CA1053683A - Thiazole derivatives and process for preparing same - Google Patents
Thiazole derivatives and process for preparing sameInfo
- Publication number
- CA1053683A CA1053683A CA226,932A CA226932A CA1053683A CA 1053683 A CA1053683 A CA 1053683A CA 226932 A CA226932 A CA 226932A CA 1053683 A CA1053683 A CA 1053683A
- Authority
- CA
- Canada
- Prior art keywords
- alkyl group
- thiazole
- formula
- hydrogen atom
- trans
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 150000007979 thiazole derivatives Chemical class 0.000 title claims abstract description 6
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 125000000217 alkyl group Chemical group 0.000 claims abstract description 88
- 150000001875 compounds Chemical class 0.000 claims abstract description 59
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims abstract description 39
- 238000000034 method Methods 0.000 claims abstract description 25
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims abstract description 10
- 125000004043 oxo group Chemical group O=* 0.000 claims abstract description 7
- 125000004423 acyloxy group Chemical group 0.000 claims abstract description 6
- 239000002253 acid Substances 0.000 claims description 16
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 11
- 229910052783 alkali metal Inorganic materials 0.000 claims description 10
- 150000001340 alkali metals Chemical class 0.000 claims description 10
- DERLEQYHZCMIPL-UHFFFAOYSA-N 1-(triphenyl-$l^{5}-phosphanylidene)heptan-2-one Chemical compound C=1C=CC=CC=1P(C=1C=CC=CC=1)(=CC(=O)CCCCC)C1=CC=CC=C1 DERLEQYHZCMIPL-UHFFFAOYSA-N 0.000 claims description 9
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 9
- NKAIMOKWJUNRHC-UHFFFAOYSA-N 4-(6-carboxyhexyl)-1,3-thiazole-5-carboxylic acid Chemical compound OC(=O)CCCCCCC=1N=CSC=1C(O)=O NKAIMOKWJUNRHC-UHFFFAOYSA-N 0.000 claims description 8
- WQDUMFSSJAZKTM-UHFFFAOYSA-N Sodium methoxide Chemical compound [Na+].[O-]C WQDUMFSSJAZKTM-UHFFFAOYSA-N 0.000 claims description 8
- UKTJGRDQSNRYPJ-UHFFFAOYSA-N dimethyl 3-oxodecanedioate Chemical compound COC(=O)CCCCCCC(=O)CC(=O)OC UKTJGRDQSNRYPJ-UHFFFAOYSA-N 0.000 claims description 8
- 150000003385 sodium Chemical class 0.000 claims description 8
- -1 4-(6-carbo-methoxyhexyl)-thiazole-5-carboxylic acid methylester Chemical class 0.000 claims description 7
- 230000007062 hydrolysis Effects 0.000 claims description 7
- 238000006460 hydrolysis reaction Methods 0.000 claims description 7
- 150000004702 methyl esters Chemical class 0.000 claims description 6
- ILWBMLIDNDNTIG-OUKQBFOZSA-N 7-[5-[(e)-3-hydroxyoct-1-enyl]-1,3-thiazol-4-yl]heptanoic acid Chemical compound CCCCCC(O)\C=C\C=1SC=NC=1CCCCCCC(O)=O ILWBMLIDNDNTIG-OUKQBFOZSA-N 0.000 claims description 5
- 230000032050 esterification Effects 0.000 claims description 5
- 238000005886 esterification reaction Methods 0.000 claims description 5
- 230000003301 hydrolyzing effect Effects 0.000 claims description 5
- FSHLMNANSBRVJE-UHFFFAOYSA-N methyl 4-(7-methoxy-7-oxoheptyl)-1,3-thiazole-5-carboxylate Chemical compound COC(=O)CCCCCCC=1N=CSC=1C(=O)OC FSHLMNANSBRVJE-UHFFFAOYSA-N 0.000 claims description 5
- PGHMHMOTXLBYNA-OUKQBFOZSA-N 7-[5-[(e)-3-oxooct-1-enyl]-1,3-thiazol-4-yl]heptanoic acid Chemical compound CCCCCC(=O)\C=C\C=1SC=NC=1CCCCCCC(O)=O PGHMHMOTXLBYNA-OUKQBFOZSA-N 0.000 claims description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 4
- 150000001408 amides Chemical class 0.000 claims description 4
- 229910052744 lithium Inorganic materials 0.000 claims description 4
- 229910001854 alkali hydroxide Inorganic materials 0.000 claims description 3
- 150000008044 alkali metal hydroxides Chemical class 0.000 claims description 3
- 125000001160 methoxycarbonyl group Chemical group [H]C([H])([H])OC(*)=O 0.000 claims description 3
- 230000003647 oxidation Effects 0.000 claims description 3
- 238000007254 oxidation reaction Methods 0.000 claims description 3
- YBBRCQOCSYXUOC-UHFFFAOYSA-N sulfuryl dichloride Chemical compound ClS(Cl)(=O)=O YBBRCQOCSYXUOC-UHFFFAOYSA-N 0.000 claims description 3
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 claims description 3
- WDJHALXBUFZDSR-UHFFFAOYSA-N Acetoacetic acid Natural products CC(=O)CC(O)=O WDJHALXBUFZDSR-UHFFFAOYSA-N 0.000 claims description 2
- 108090000371 Esterases Proteins 0.000 claims description 2
- 238000005660 chlorination reaction Methods 0.000 claims description 2
- 125000004185 ester group Chemical group 0.000 claims description 2
- 125000005843 halogen group Chemical group 0.000 claims description 2
- 230000002140 halogenating effect Effects 0.000 claims description 2
- 230000001590 oxidative effect Effects 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- TWLCEYWYILDCDA-UHFFFAOYSA-N chromium(6+) oxygen(2-) pyridine Chemical compound [O-2].[O-2].[O-2].[Cr+6].C1=CC=NC=C1.C1=CC=NC=C1 TWLCEYWYILDCDA-UHFFFAOYSA-N 0.000 claims 1
- 150000003180 prostaglandins Chemical class 0.000 abstract description 16
- 229940094443 oxytocics prostaglandins Drugs 0.000 abstract description 15
- 230000000694 effects Effects 0.000 abstract description 12
- 238000000354 decomposition reaction Methods 0.000 abstract description 4
- 230000001225 therapeutic effect Effects 0.000 abstract description 4
- 102000004190 Enzymes Human genes 0.000 abstract description 3
- 108090000790 Enzymes Proteins 0.000 abstract description 3
- 230000002401 inhibitory effect Effects 0.000 abstract description 3
- 230000002997 prostaglandinlike Effects 0.000 abstract description 3
- 230000004071 biological effect Effects 0.000 abstract description 2
- 230000001939 inductive effect Effects 0.000 abstract description 2
- 210000000056 organ Anatomy 0.000 abstract description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 106
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 105
- 235000013350 formula milk Nutrition 0.000 description 84
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 55
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 47
- 239000000243 solution Substances 0.000 description 45
- 239000011541 reaction mixture Substances 0.000 description 40
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 36
- 239000000203 mixture Substances 0.000 description 28
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 25
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 21
- 239000012043 crude product Substances 0.000 description 21
- 238000000655 nuclear magnetic resonance spectrum Methods 0.000 description 21
- 238000002329 infrared spectrum Methods 0.000 description 19
- 229910052938 sodium sulfate Inorganic materials 0.000 description 18
- 235000011152 sodium sulphate Nutrition 0.000 description 18
- FZWLAAWBMGSTSO-UHFFFAOYSA-N Thiazole Chemical group C1=CSC=N1 FZWLAAWBMGSTSO-UHFFFAOYSA-N 0.000 description 17
- 239000001257 hydrogen Substances 0.000 description 17
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 15
- 238000002360 preparation method Methods 0.000 description 15
- 239000002904 solvent Substances 0.000 description 15
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 14
- 238000003756 stirring Methods 0.000 description 14
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 13
- 238000006243 chemical reaction Methods 0.000 description 13
- 238000001704 evaporation Methods 0.000 description 13
- 230000008020 evaporation Effects 0.000 description 13
- 150000002500 ions Chemical class 0.000 description 13
- 238000012746 preparative thin layer chromatography Methods 0.000 description 13
- 239000000741 silica gel Substances 0.000 description 13
- 229910002027 silica gel Inorganic materials 0.000 description 13
- 229960001866 silicon dioxide Drugs 0.000 description 13
- 229960004132 diethyl ether Drugs 0.000 description 12
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 description 12
- ZQIGJRNKMLMFTB-UHFFFAOYSA-N dimethyl 2-chloro-3-oxodecanedioate Chemical compound COC(=O)CCCCCCC(=O)C(Cl)C(=O)OC ZQIGJRNKMLMFTB-UHFFFAOYSA-N 0.000 description 11
- 239000003463 adsorbent Substances 0.000 description 10
- 239000002024 ethyl acetate extract Substances 0.000 description 10
- CTSLXHKWHWQRSH-UHFFFAOYSA-N oxalyl chloride Chemical compound ClC(=O)C(Cl)=O CTSLXHKWHWQRSH-UHFFFAOYSA-N 0.000 description 10
- UDWJUBFHYVSGNR-UHFFFAOYSA-N 1-o-ethyl 10-o-methyl 2-acetyl-3-oxodecanedioate Chemical compound CCOC(=O)C(C(C)=O)C(=O)CCCCCCC(=O)OC UDWJUBFHYVSGNR-UHFFFAOYSA-N 0.000 description 9
- WFDIJRYMOXRFFG-UHFFFAOYSA-N Acetic anhydride Chemical compound CC(=O)OC(C)=O WFDIJRYMOXRFFG-UHFFFAOYSA-N 0.000 description 9
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 9
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 9
- HEDRZPFGACZZDS-MICDWDOJSA-N Trichloro(2H)methane Chemical compound [2H]C(Cl)(Cl)Cl HEDRZPFGACZZDS-MICDWDOJSA-N 0.000 description 9
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 9
- 239000000284 extract Substances 0.000 description 9
- 239000002609 medium Substances 0.000 description 9
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 8
- 238000001819 mass spectrum Methods 0.000 description 8
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 8
- 239000012279 sodium borohydride Substances 0.000 description 8
- 229910000033 sodium borohydride Inorganic materials 0.000 description 8
- 101150041968 CDC13 gene Proteins 0.000 description 7
- 241000700159 Rattus Species 0.000 description 7
- 238000001816 cooling Methods 0.000 description 7
- 239000000047 product Substances 0.000 description 7
- 238000000746 purification Methods 0.000 description 7
- 239000011734 sodium Substances 0.000 description 7
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 6
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 6
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 6
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 6
- 229910052708 sodium Inorganic materials 0.000 description 6
- 238000001228 spectrum Methods 0.000 description 6
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 description 5
- NGNBDVOYPDDBFK-UHFFFAOYSA-N 2-[2,4-di(pentan-2-yl)phenoxy]acetyl chloride Chemical compound CCCC(C)C1=CC=C(OCC(Cl)=O)C(C(C)CCC)=C1 NGNBDVOYPDDBFK-UHFFFAOYSA-N 0.000 description 5
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 5
- 230000000875 corresponding effect Effects 0.000 description 5
- 238000004821 distillation Methods 0.000 description 5
- 230000007071 enzymatic hydrolysis Effects 0.000 description 5
- 238000006047 enzymatic hydrolysis reaction Methods 0.000 description 5
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 5
- MWQMRLXQJCGHTO-UHFFFAOYSA-N methyl 7-(5-formyl-2-methyl-1,3-thiazol-4-yl)heptanoate Chemical compound COC(=O)CCCCCCC=1N=C(C)SC=1C=O MWQMRLXQJCGHTO-UHFFFAOYSA-N 0.000 description 5
- AHFXIQMVNJFKMX-CCEZHUSRSA-N methyl 7-[2-methyl-5-[(e)-3-oxooct-1-enyl]-1,3-thiazol-4-yl]heptanoate Chemical compound CCCCCC(=O)\C=C\C=1SC(C)=NC=1CCCCCCC(=O)OC AHFXIQMVNJFKMX-CCEZHUSRSA-N 0.000 description 5
- RKUPOLBFJIEWBZ-UHFFFAOYSA-N methyl 8-chloro-8-oxooctanoate Chemical compound COC(=O)CCCCCCC(Cl)=O RKUPOLBFJIEWBZ-UHFFFAOYSA-N 0.000 description 5
- 230000009467 reduction Effects 0.000 description 5
- 238000006722 reduction reaction Methods 0.000 description 5
- 239000001117 sulphuric acid Substances 0.000 description 5
- 235000011149 sulphuric acid Nutrition 0.000 description 5
- 210000004291 uterus Anatomy 0.000 description 5
- SKCRUDDGFCKJMY-UHFFFAOYSA-N 4-(6-carboxyhexyl)-2-methyl-1,3-thiazole-5-carboxylic acid Chemical compound CC1=NC(CCCCCCC(O)=O)=C(C(O)=O)S1 SKCRUDDGFCKJMY-UHFFFAOYSA-N 0.000 description 4
- CPFLKZKNYOUSHP-UHFFFAOYSA-N 4-(7-methoxy-7-oxoheptyl)-1,3-thiazole-5-carboxylic acid Chemical compound COC(=O)CCCCCCC=1N=CSC=1C(O)=O CPFLKZKNYOUSHP-UHFFFAOYSA-N 0.000 description 4
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 4
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 4
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 4
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 4
- 239000001166 ammonium sulphate Substances 0.000 description 4
- 235000011130 ammonium sulphate Nutrition 0.000 description 4
- 125000004429 atom Chemical group 0.000 description 4
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 4
- XYIBRDXRRQCHLP-UHFFFAOYSA-N ethyl acetoacetate Chemical compound CCOC(=O)CC(C)=O XYIBRDXRRQCHLP-UHFFFAOYSA-N 0.000 description 4
- 238000001953 recrystallisation Methods 0.000 description 4
- TYFQFVWCELRYAO-UHFFFAOYSA-N suberic acid Chemical compound OC(=O)CCCCCCC(O)=O TYFQFVWCELRYAO-UHFFFAOYSA-N 0.000 description 4
- 239000000725 suspension Substances 0.000 description 4
- WODKJPRGFAEBBZ-UHFFFAOYSA-N 4-(7-methoxy-7-oxoheptyl)-2-methyl-1,3-thiazole-5-carboxylic acid Chemical compound COC(=O)CCCCCCC=1N=C(C)SC=1C(O)=O WODKJPRGFAEBBZ-UHFFFAOYSA-N 0.000 description 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
- WBWWGRHZICKQGZ-UHFFFAOYSA-N Taurocholic acid Natural products OC1CC2CC(O)CCC2(C)C2C1C1CCC(C(CCC(=O)NCCS(O)(=O)=O)C)C1(C)C(O)C2 WBWWGRHZICKQGZ-UHFFFAOYSA-N 0.000 description 3
- 238000004587 chromatography analysis Methods 0.000 description 3
- 238000004440 column chromatography Methods 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- UWSZHRIGXFNGCU-BUHFOSPRSA-N methyl 7-[5-[(e)-3-oxooct-1-enyl]-1,3-thiazol-4-yl]heptanoate Chemical compound CCCCCC(=O)\C=C\C=1SC=NC=1CCCCCCC(=O)OC UWSZHRIGXFNGCU-BUHFOSPRSA-N 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 3
- 239000008363 phosphate buffer Substances 0.000 description 3
- 125000003259 prostaglandin group Chemical group 0.000 description 3
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 description 3
- 235000017550 sodium carbonate Nutrition 0.000 description 3
- 229940001593 sodium carbonate Drugs 0.000 description 3
- WBWWGRHZICKQGZ-GIHLXUJPSA-N taurocholic acid Chemical compound C([C@@H]1C[C@H]2O)[C@@H](O)CC[C@]1(C)[C@@H]1[C@@H]2[C@@H]2CC[C@@H]([C@@H](CCC(=O)NCCS(O)(=O)=O)C)[C@@]2(C)[C@H](O)C1 WBWWGRHZICKQGZ-GIHLXUJPSA-N 0.000 description 3
- 210000001519 tissue Anatomy 0.000 description 3
- ZXRLWHGLEJGMNO-UHFFFAOYSA-N 1,3-thiazole-5-carbaldehyde Chemical compound O=CC1=CN=CS1 ZXRLWHGLEJGMNO-UHFFFAOYSA-N 0.000 description 2
- 108010051913 15-hydroxyprostaglandin dehydrogenase Proteins 0.000 description 2
- MDJWDHXHJXTDBH-BUHFOSPRSA-N 7-[5-[(e)-3-hydroxyoct-1-enyl]-2-methyl-1,3-thiazol-4-yl]heptanoic acid Chemical compound CCCCCC(O)\C=C\C=1SC(C)=NC=1CCCCCCC(O)=O MDJWDHXHJXTDBH-BUHFOSPRSA-N 0.000 description 2
- 244000215068 Acacia senegal Species 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- IAZDPXIOMUYVGZ-WFGJKAKNSA-N Dimethyl sulfoxide Chemical compound [2H]C([2H])([2H])S(=O)C([2H])([2H])[2H] IAZDPXIOMUYVGZ-WFGJKAKNSA-N 0.000 description 2
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 2
- 229920000084 Gum arabic Polymers 0.000 description 2
- 108090001060 Lipase Proteins 0.000 description 2
- 102000004882 Lipase Human genes 0.000 description 2
- KEAYESYHFKHZAL-UHFFFAOYSA-N Sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- 239000000205 acacia gum Substances 0.000 description 2
- 235000010489 acacia gum Nutrition 0.000 description 2
- 125000005907 alkyl ester group Chemical group 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- 150000001805 chlorine compounds Chemical class 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 238000010828 elution Methods 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- 238000004508 fractional distillation Methods 0.000 description 2
- 239000008103 glucose Substances 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 239000005457 ice water Substances 0.000 description 2
- 125000000468 ketone group Chemical group 0.000 description 2
- 230000004130 lipolysis Effects 0.000 description 2
- NULWDFKIPXIDNF-UHFFFAOYSA-N methyl 4-(7-methoxy-7-oxoheptyl)-2-methyl-1,3-thiazole-5-carboxylate Chemical compound COC(=O)CCCCCCC=1N=C(C)SC=1C(=O)OC NULWDFKIPXIDNF-UHFFFAOYSA-N 0.000 description 2
- LFQWEQZSUMSRJN-UHFFFAOYSA-N methyl 7-[5-(hydroxymethyl)-2-methyl-1,3-thiazol-4-yl]heptanoate Chemical compound COC(=O)CCCCCCC=1N=C(C)SC=1CO LFQWEQZSUMSRJN-UHFFFAOYSA-N 0.000 description 2
- TUQSODXCSKNBFI-BUHFOSPRSA-N methyl 7-[5-[(e)-3-hydroxyoct-1-enyl]-1,3-thiazol-4-yl]heptanoate Chemical compound CCCCCC(O)\C=C\C=1SC=NC=1CCCCCCC(=O)OC TUQSODXCSKNBFI-BUHFOSPRSA-N 0.000 description 2
- KJIFKLIQANRMOU-UHFFFAOYSA-N oxidanium;4-methylbenzenesulfonate Chemical compound O.CC1=CC=C(S(O)(=O)=O)C=C1 KJIFKLIQANRMOU-UHFFFAOYSA-N 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
- 102200073741 rs121909602 Human genes 0.000 description 2
- 238000007127 saponification reaction Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 238000009738 saturating Methods 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 159000000000 sodium salts Chemical class 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 2
- FYSNRJHAOHDILO-UHFFFAOYSA-N thionyl chloride Chemical compound ClS(Cl)=O FYSNRJHAOHDILO-UHFFFAOYSA-N 0.000 description 2
- FIQMHBFVRAXMOP-UHFFFAOYSA-N triphenylphosphane oxide Chemical compound C=1C=CC=CC=1P(C=1C=CC=CC=1)(=O)C1=CC=CC=C1 FIQMHBFVRAXMOP-UHFFFAOYSA-N 0.000 description 2
- 238000005292 vacuum distillation Methods 0.000 description 2
- YJTKZCDBKVTVBY-UHFFFAOYSA-N 1,3-Diphenylbenzene Chemical group C1=CC=CC=C1C1=CC=CC(C=2C=CC=CC=2)=C1 YJTKZCDBKVTVBY-UHFFFAOYSA-N 0.000 description 1
- WKBQQWDVVHGWDB-UHFFFAOYSA-N 1,3-thiazol-5-ylmethanol Chemical compound OCC1=CN=CS1 WKBQQWDVVHGWDB-UHFFFAOYSA-N 0.000 description 1
- MDZHTHTULSCAPV-UHFFFAOYSA-N 1-O-ethyl 5-O-methyl 2-heptanoyl-3-oxopentanedioate Chemical compound CCCCCCC(=O)C(C(=O)OCC)C(=O)CC(=O)OC MDZHTHTULSCAPV-UHFFFAOYSA-N 0.000 description 1
- LQZCYXCHWNQBKX-UHFFFAOYSA-N 1-dimethoxyphosphorylheptan-2-one Chemical compound CCCCCC(=O)CP(=O)(OC)OC LQZCYXCHWNQBKX-UHFFFAOYSA-N 0.000 description 1
- 102100030489 15-hydroxyprostaglandin dehydrogenase [NAD(+)] Human genes 0.000 description 1
- OAXSBIJZTFSWRG-UHFFFAOYSA-N 2-(2-sulfanylidenepyrrolidin-1-yl)acetamide Chemical compound NC(=O)CN1CCCC1=S OAXSBIJZTFSWRG-UHFFFAOYSA-N 0.000 description 1
- SHDOPXQMNJDYDK-UHFFFAOYSA-N 2-oxononanoic acid Chemical compound CCCCCCCC(=O)C(O)=O SHDOPXQMNJDYDK-UHFFFAOYSA-N 0.000 description 1
- OCUOIXPYMRKHNL-BUHFOSPRSA-N 7-[2-methyl-5-[(e)-3-oxooct-1-enyl]-1,3-thiazol-4-yl]heptanoic acid Chemical compound CCCCCC(=O)\C=C\C=1SC(C)=NC=1CCCCCCC(O)=O OCUOIXPYMRKHNL-BUHFOSPRSA-N 0.000 description 1
- 235000019227 E-number Nutrition 0.000 description 1
- 239000004243 E-number Substances 0.000 description 1
- 239000004367 Lipase Substances 0.000 description 1
- XYFCBTPGUUZFHI-UHFFFAOYSA-N Phosphine Chemical compound P XYFCBTPGUUZFHI-UHFFFAOYSA-N 0.000 description 1
- 241000235527 Rhizopus Species 0.000 description 1
- 240000005384 Rhizopus oryzae Species 0.000 description 1
- 239000012891 Ringer solution Substances 0.000 description 1
- 101100073357 Streptomyces halstedii sch2 gene Proteins 0.000 description 1
- 101100054666 Streptomyces halstedii sch3 gene Proteins 0.000 description 1
- 238000007239 Wittig reaction Methods 0.000 description 1
- 150000008065 acid anhydrides Chemical class 0.000 description 1
- 229910000091 aluminium hydride Inorganic materials 0.000 description 1
- 229940006138 antiglaucoma drug and miotics prostaglandin analogues Drugs 0.000 description 1
- 239000012736 aqueous medium Substances 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- FGVNCNTVSHHPTI-UHFFFAOYSA-N butoxyaluminum Chemical compound CCCCO[Al] FGVNCNTVSHHPTI-UHFFFAOYSA-N 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- VTHIKKVKIVQWHV-UHFFFAOYSA-N chromium(6+) oxygen(2-) pyridine Chemical compound [O-2].[O-2].[O-2].[Cr+6].C1=CC=NC=C1 VTHIKKVKIVQWHV-UHFFFAOYSA-N 0.000 description 1
- 230000000332 continued effect Effects 0.000 description 1
- 125000001511 cyclopentyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C1([H])[H] 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- WOWBFOBYOAGEEA-UHFFFAOYSA-N diafenthiuron Chemical compound CC(C)C1=C(NC(=S)NC(C)(C)C)C(C(C)C)=CC(OC=2C=CC=CC=2)=C1 WOWBFOBYOAGEEA-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 201000010063 epididymitis Diseases 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000002779 inactivation Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 235000019421 lipase Nutrition 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- TWXDDNPPQUTEOV-FVGYRXGTSA-N methamphetamine hydrochloride Chemical compound Cl.CN[C@@H](C)CC1=CC=CC=C1 TWXDDNPPQUTEOV-FVGYRXGTSA-N 0.000 description 1
- CYEBJEDOHLIWNP-UHFFFAOYSA-N methanethioamide Chemical compound NC=S CYEBJEDOHLIWNP-UHFFFAOYSA-N 0.000 description 1
- ZYNTVFLHVPBGJY-UHFFFAOYSA-N methyl 7-(5-carbonochloridoyl-2-methyl-1,3-thiazol-4-yl)heptanoate Chemical compound CC=1SC(=C(N1)CCCCCCC(=O)OC)C(=O)Cl ZYNTVFLHVPBGJY-UHFFFAOYSA-N 0.000 description 1
- ASPPHQXWJMEETJ-UHFFFAOYSA-N methyl 7-[5-(hydroxymethyl)-1,3-thiazol-4-yl]heptanoate Chemical compound COC(=O)CCCCCCC=1N=CSC=1CO ASPPHQXWJMEETJ-UHFFFAOYSA-N 0.000 description 1
- XKWIJLMNDJCDNZ-CCEZHUSRSA-N methyl 7-[5-[(e)-3-acetyloxyoct-1-enyl]-1,3-thiazol-4-yl]heptanoate Chemical compound CCCCCC(OC(C)=O)\C=C\C=1SC=NC=1CCCCCCC(=O)OC XKWIJLMNDJCDNZ-CCEZHUSRSA-N 0.000 description 1
- YJBHOOHRIMWSQU-FOCLMDBBSA-N methyl 7-[5-[(e)-3-acetyloxyoct-1-enyl]-2-methyl-1,3-thiazol-4-yl]heptanoate Chemical compound CCCCCC(OC(C)=O)\C=C\C=1SC(C)=NC=1CCCCCCC(=O)OC YJBHOOHRIMWSQU-FOCLMDBBSA-N 0.000 description 1
- GXDIEXCDLSTANW-CCEZHUSRSA-N methyl 7-[5-[(e)-3-hydroxyoct-1-enyl]-2-methyl-1,3-thiazol-4-yl]heptanoate Chemical compound CCCCCC(O)\C=C\C=1SC(C)=NC=1CCCCCCC(=O)OC GXDIEXCDLSTANW-CCEZHUSRSA-N 0.000 description 1
- 230000002906 microbiologic effect Effects 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 230000004118 muscle contraction Effects 0.000 description 1
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- TWHMVKPVFOOAMY-UHFFFAOYSA-N octanedioic acid Chemical compound OC(=O)CCCCCCC(O)=O.OC(=O)CCCCCCC(O)=O TWHMVKPVFOOAMY-UHFFFAOYSA-N 0.000 description 1
- 239000012074 organic phase Substances 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- TYJJADVDDVDEDZ-UHFFFAOYSA-M potassium hydrogencarbonate Chemical class [K+].OC([O-])=O TYJJADVDDVDEDZ-UHFFFAOYSA-M 0.000 description 1
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 1
- 108700022737 rat Fat1 Proteins 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000001020 rhythmical effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000012047 saturated solution Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 239000012312 sodium hydride Substances 0.000 description 1
- 229910000104 sodium hydride Inorganic materials 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 210000002784 stomach Anatomy 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 238000004809 thin layer chromatography Methods 0.000 description 1
- 238000005809 transesterification reaction Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/0004—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor along the working face
- E21D23/0017—Pile type supports
- E21D23/0021—Pile type supports comprising two walking elements
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/30—Preparation of carboxylic acid esters by modifying the acid moiety of the ester, such modification not being an introduction of an ester group
- C07C67/307—Preparation of carboxylic acid esters by modifying the acid moiety of the ester, such modification not being an introduction of an ester group by introduction of halogen; by substitution of halogen atoms by other halogen atoms
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/30—Preparation of carboxylic acid esters by modifying the acid moiety of the ester, such modification not being an introduction of an ester group
- C07C67/333—Preparation of carboxylic acid esters by modifying the acid moiety of the ester, such modification not being an introduction of an ester group by isomerisation; by change of size of the carbon skeleton
- C07C67/343—Preparation of carboxylic acid esters by modifying the acid moiety of the ester, such modification not being an introduction of an ester group by isomerisation; by change of size of the carbon skeleton by increase in the number of carbon atoms
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D277/00—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings
- C07D277/02—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings
- C07D277/20—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
- C07D277/22—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to ring carbon atoms
- C07D277/30—Radicals substituted by carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/04—Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of props; Means for counteracting lateral sliding on inclined floor
- E21D23/0409—Aligning or guiding means for the supports or for the constitutive parts of the supports
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Thiazole And Isothizaole Compounds (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE:
The present invention relates to novel thiazole deriva-tives of the general formula I
(I)
The present invention relates to novel thiazole deriva-tives of the general formula I
(I)
Description
The invention relates to novel thiazole derivatives of the general formula I, carrying prostaglandin side-chains, N ~ 2 R~
S ~~ ~ .
wherein Rl and R2 denote hydrogen atoms or alkyl groups, and R3 denotes an oxo, hydroxyl or acyloxy group. Furthermore the invention relates to processes for preparing these com-pounds.
Attempts are known to utilize the many-sided physio-logical effectsof prostaglandins in several fields of pharma-ceutical researches~ The effect of native prostaglandins is not sufficiently selective, and they are quickly deactivated in the organism, These drawbacks can be eliminated by the production of prostaglandin analogues of more selective effect that are metabolized slower (P. Ramwell and J. Shaw: Ann.
N. Y. Acad. Sci. 180, 10/1971/). Among the compounds struc-turally related to the prostaglandins also compounds can befound which inhibit both the biosynthesis and various effects o~ prostaglandins present in the organism (J. Fried et al.:
Ann. N. Y. Acad. Sci. 180, 38 /1971/). These compounds having prostaglandin-antagonistic effect may be valuable also from therapeutic aspects. Compounds inhibiting the metabolization of nàtive prostaglandins possess a therapeutic significance as well.
! The invention is aimed at the production of novel compounds with a structure related to that of prostaglandins, in which compounds the prostaglandin side-chains are coupled to a thiazole ring, instead of the cyclopentane ring present in native prostaglandins. These two side-chains can be
S ~~ ~ .
wherein Rl and R2 denote hydrogen atoms or alkyl groups, and R3 denotes an oxo, hydroxyl or acyloxy group. Furthermore the invention relates to processes for preparing these com-pounds.
Attempts are known to utilize the many-sided physio-logical effectsof prostaglandins in several fields of pharma-ceutical researches~ The effect of native prostaglandins is not sufficiently selective, and they are quickly deactivated in the organism, These drawbacks can be eliminated by the production of prostaglandin analogues of more selective effect that are metabolized slower (P. Ramwell and J. Shaw: Ann.
N. Y. Acad. Sci. 180, 10/1971/). Among the compounds struc-turally related to the prostaglandins also compounds can befound which inhibit both the biosynthesis and various effects o~ prostaglandins present in the organism (J. Fried et al.:
Ann. N. Y. Acad. Sci. 180, 38 /1971/). These compounds having prostaglandin-antagonistic effect may be valuable also from therapeutic aspects. Compounds inhibiting the metabolization of nàtive prostaglandins possess a therapeutic significance as well.
! The invention is aimed at the production of novel compounds with a structure related to that of prostaglandins, in which compounds the prostaglandin side-chains are coupled to a thiazole ring, instead of the cyclopentane ring present in native prostaglandins. These two side-chains can be
-2-' located in the thiazole ring vicinally at the carbon atoms 4 and 5.
In the course of our experiments we succeeded in synthesizing new thiazole derivatives in which a 6-carboxy-hexyl or 6-carbalkoxyhexyl side chain is coupled to the C4-atom of t~e thiazole ring, a 3-oxo-1-trans-octenyl or 3-hydroxy-l-trans-octenyl or 3-acyloxy-1-trans-octenyl side-chain is coupled to the C5-atom of the ring, and a hydrogen atom or an alkyl group is coupled to the C2-atom of the ring.
In one aspect the invention provides new thiazole der.~vatives of the general formula I
N ~ COOR2 R _ < 1 (I) S \~
wherein Rl and R2 denote hydrogen atoms or alkyl groups, and R3 denotes an oxo, hydroxyl or acyloxy group.
Compounds of the general formula I produced according to the invention have been classified as follows :
.
Rl R2 R3 Ia hydrogen or alkyl alkyl oxo Ib " " " hydrogen oxo Ic " " " alkyl hydroxyl Id " " " hydrogen hydroxyl Ie " " " alkyl acyloxy ~.
In an other aspect the invention provides methods for preparing the new compounds of general formula I.
Method a) (reaction scheme 1) comprises the following Qteps: acylating the sodium derivative of an acetoacetic .
. . . . ~ .
- : :, : -acid alkylester of the general formula II, wherein R4 denotes an alkyl group, with a 7-carbalkoxyheptanoyl chloride of the general formula III, wherein R5 denotes an alkyl group, and converting the obtained 10-carbalkoxy-2,4-diketodecane-3-carboxylic acid alkylester of the general formula IV, wherein R4 and Rs have the same meanings as above, with sodium methyl-ate into 9-carbomethoxy-3-ketononanic acid methylester of formula V, halogenating the latter compound to 9-carbomethoxy-2-halo-3-ketononanic acid methylester of the general formula VI, wherein Y denotes a halogen atom, reacting VI with a thioacid amide of the general formula VII, wherein Rl denotes a hydrogen atom or an alkyl group, hydrolyzing the obtained 4-(6-carbomethoxyhexyl)-thiazole-5-carboxylic acid methylester of the general formula VIII, wherein Rl stands for a hydrogen atom or an alkyl group, to obtain 4-(6-carboxyhexyl)-thiazole-5-carboxylic acid of the general formula IX, wherein Rl is a hydrogen atom or an alkyl group, subjecting IX to selective e~terification with an alcohol of the general formula R20H, wherein R2 stands for an alkyl group, in the presence of p-toluenesulphonic acid, converting the thusobtained 4-(6-car-balkoxyhexyl)-thiazole-5-carboxylic acid of the general for-mula X, wherein Rl is a hydrogen atom or an alkyl group and R2 is an alkyl group, into 4-(6-carbalkoxyhexyl~-thiazole-5-carboxylic chloride of the general formula XI, wherein Rl is a hydrogen atom or an alkyl group and R2 is an alkyl group, reducing XI with an alkali metal borohydride to 4-(6-carbal-; koxyhexyl)-5-hydroxymethylthiazole of the general formula XII, wherein Rl is a hydrogen atom or an alkyl group and R2 is an alkyl group, then oxidizing XII to 4-(6-carbalkoxyhexyl)-thiazole-5-carbaldehyde of the general formula XIII, wherein Rl is a hydrogen atom or an alkyl group, and R2 is an alkyl group, reacting XIII with 2-oxo-heptylidene-triphenyl-phosphorane to obtain 4-(6-carbalkoxyhexyl)-5-(3-keto-1-trans-octenyl)-thiazole of the general formula Ia, wherein Rl is a hydrogen atom or an alkyl group and R2 is an alkyl group.
Method b) comprises the steps of reducing 4-(6-carbal-koxyhexyl)-thiazole-5-carboxylic chloric of the general for-mula XI, wherein Rl stands for a hydrogen atom or an alkyl group and R2 stands for an alkyl group, with lithium tri-tert.-butoxy-aluminium hydride to 4-(6-carbalkoxyhexyl)-thiazole-5-carbaldehyde of the general formula XIII, wherein Rl stands for a hydrogen atom or an alkyl group and R2 stands for an alkyl group, then reacting XIII with 2-oxo-heptylidene-tri-phenyl-phosphorane to obtain 4-(6-carbalkoxyhexyl)-5-(3-keto-l-trans-octenyl)-thiazole of the general ' ' /
-5- :
.~, . . . . .
-- 6 _ ~ormula IQ, wherein R1 i~ a h~drogen atom or an alkyl group and R2 i8 an al~yl group.
Method c) comprises the step~ Or converting~' 4-(6-carbalkoxyhex~ thiazole-5-carbaldehyde of the general formula ~III, wherein R1 is a hydrogen atom or an alkyl group, and R2 i8 an alkyl.group, with the sodium derivative of 2-oxo-heptylphosphonic acid dimethylest'er or with 2_oxo-hept~lidene-triphenyl phosphorane into 4-(6-carbalkoxyhexyl)-5-(3-keto-1-trans-octenyl)-thiazole . 10 of the general formula Ia, wherein R1 is Q hydrogen atom or an alkyl group and R2 is an alkyl group, and, ir desired, ' hydr,ozyling Ia to 4-~carboxyhexyl)-5-(3-keto-1-trans-octenyl)-thiazole of the general formul~ Ib, wherein ~
is a hydrogen atom or an alkyl group (reaction scheme 2),.
or, if desired, reducing Ia with an alkali metal boro- ' ' ' bydrlde to 4-(6-carbalkoxyhex~1)-5-(3-hydrox~ tran~-octon~
.1 . . thlazolej; o~ the general formula Ic, wherein ~1 i8 a
In the course of our experiments we succeeded in synthesizing new thiazole derivatives in which a 6-carboxy-hexyl or 6-carbalkoxyhexyl side chain is coupled to the C4-atom of t~e thiazole ring, a 3-oxo-1-trans-octenyl or 3-hydroxy-l-trans-octenyl or 3-acyloxy-1-trans-octenyl side-chain is coupled to the C5-atom of the ring, and a hydrogen atom or an alkyl group is coupled to the C2-atom of the ring.
In one aspect the invention provides new thiazole der.~vatives of the general formula I
N ~ COOR2 R _ < 1 (I) S \~
wherein Rl and R2 denote hydrogen atoms or alkyl groups, and R3 denotes an oxo, hydroxyl or acyloxy group.
Compounds of the general formula I produced according to the invention have been classified as follows :
.
Rl R2 R3 Ia hydrogen or alkyl alkyl oxo Ib " " " hydrogen oxo Ic " " " alkyl hydroxyl Id " " " hydrogen hydroxyl Ie " " " alkyl acyloxy ~.
In an other aspect the invention provides methods for preparing the new compounds of general formula I.
Method a) (reaction scheme 1) comprises the following Qteps: acylating the sodium derivative of an acetoacetic .
. . . . ~ .
- : :, : -acid alkylester of the general formula II, wherein R4 denotes an alkyl group, with a 7-carbalkoxyheptanoyl chloride of the general formula III, wherein R5 denotes an alkyl group, and converting the obtained 10-carbalkoxy-2,4-diketodecane-3-carboxylic acid alkylester of the general formula IV, wherein R4 and Rs have the same meanings as above, with sodium methyl-ate into 9-carbomethoxy-3-ketononanic acid methylester of formula V, halogenating the latter compound to 9-carbomethoxy-2-halo-3-ketononanic acid methylester of the general formula VI, wherein Y denotes a halogen atom, reacting VI with a thioacid amide of the general formula VII, wherein Rl denotes a hydrogen atom or an alkyl group, hydrolyzing the obtained 4-(6-carbomethoxyhexyl)-thiazole-5-carboxylic acid methylester of the general formula VIII, wherein Rl stands for a hydrogen atom or an alkyl group, to obtain 4-(6-carboxyhexyl)-thiazole-5-carboxylic acid of the general formula IX, wherein Rl is a hydrogen atom or an alkyl group, subjecting IX to selective e~terification with an alcohol of the general formula R20H, wherein R2 stands for an alkyl group, in the presence of p-toluenesulphonic acid, converting the thusobtained 4-(6-car-balkoxyhexyl)-thiazole-5-carboxylic acid of the general for-mula X, wherein Rl is a hydrogen atom or an alkyl group and R2 is an alkyl group, into 4-(6-carbalkoxyhexyl~-thiazole-5-carboxylic chloride of the general formula XI, wherein Rl is a hydrogen atom or an alkyl group and R2 is an alkyl group, reducing XI with an alkali metal borohydride to 4-(6-carbal-; koxyhexyl)-5-hydroxymethylthiazole of the general formula XII, wherein Rl is a hydrogen atom or an alkyl group and R2 is an alkyl group, then oxidizing XII to 4-(6-carbalkoxyhexyl)-thiazole-5-carbaldehyde of the general formula XIII, wherein Rl is a hydrogen atom or an alkyl group, and R2 is an alkyl group, reacting XIII with 2-oxo-heptylidene-triphenyl-phosphorane to obtain 4-(6-carbalkoxyhexyl)-5-(3-keto-1-trans-octenyl)-thiazole of the general formula Ia, wherein Rl is a hydrogen atom or an alkyl group and R2 is an alkyl group.
Method b) comprises the steps of reducing 4-(6-carbal-koxyhexyl)-thiazole-5-carboxylic chloric of the general for-mula XI, wherein Rl stands for a hydrogen atom or an alkyl group and R2 stands for an alkyl group, with lithium tri-tert.-butoxy-aluminium hydride to 4-(6-carbalkoxyhexyl)-thiazole-5-carbaldehyde of the general formula XIII, wherein Rl stands for a hydrogen atom or an alkyl group and R2 stands for an alkyl group, then reacting XIII with 2-oxo-heptylidene-tri-phenyl-phosphorane to obtain 4-(6-carbalkoxyhexyl)-5-(3-keto-l-trans-octenyl)-thiazole of the general ' ' /
-5- :
.~, . . . . .
-- 6 _ ~ormula IQ, wherein R1 i~ a h~drogen atom or an alkyl group and R2 i8 an al~yl group.
Method c) comprises the step~ Or converting~' 4-(6-carbalkoxyhex~ thiazole-5-carbaldehyde of the general formula ~III, wherein R1 is a hydrogen atom or an alkyl group, and R2 i8 an alkyl.group, with the sodium derivative of 2-oxo-heptylphosphonic acid dimethylest'er or with 2_oxo-hept~lidene-triphenyl phosphorane into 4-(6-carbalkoxyhexyl)-5-(3-keto-1-trans-octenyl)-thiazole . 10 of the general formula Ia, wherein R1 is Q hydrogen atom or an alkyl group and R2 is an alkyl group, and, ir desired, ' hydr,ozyling Ia to 4-~carboxyhexyl)-5-(3-keto-1-trans-octenyl)-thiazole of the general formul~ Ib, wherein ~
is a hydrogen atom or an alkyl group (reaction scheme 2),.
or, if desired, reducing Ia with an alkali metal boro- ' ' ' bydrlde to 4-(6-carbalkoxyhex~1)-5-(3-hydrox~ tran~-octon~
.1 . . thlazolej; o~ the general formula Ic, wherein ~1 i8 a
3 h~drogen atom or an alkyl group and R2 i8 an alk~l group . (reaction scheme 3), or, if desired, reducing the compound ' 20 0~ general formula Ib with an alkali metal bor'ohyd~ide ~reaction soheme 4),.or hydrolyzing the compound of the i goneral formula Ic (reaction ~cheme 5) to 4-(6-carboxyhe~yl)-¦~ ' 5-(3-hvdroxy-1-trans-o~te~ thiazole Or the general ! ~ormula Id~ wherei~ R1 stands for a hydrogen~atom or an .
25 a}~yl group, or ac~lating ~he compound Or the:general . ' .~rm~la Ic (reactio~ :scheme 6) to 4-(6-carbalkoxyhe~y1)-5-.` (3-aoyloxy-1-trans-ootenyl)-thiazole o~ the general ~ormula `' Io~wherel~ R1 8tand8 for a h~1rogen atom or an alkJl 6roup and ~2 .itand~-for an al4yl g~oup.
~Q In.methodl a~'roi-s~nthesising the compounds Or the -: . . - ~ .
general formula I the starting material is an acetoacetic alkylester of the general formula II, preferably the readily available acetoacetic ethylester, and suberic acid (hexane-1,6-dicarboxylic acid).
The acetoacetic ester is converted into its sodium derivative by stirring the ester for 3-5 hours with sodium metal cut to small pieces, in a medium of anhydrous benzene or anhydrous ether. On reacting the sodium derivative of the acetoacetic ester with 7-carbalkoxyheptanoyl chloride of the general formula III prepared from suberic acid, a 10-carbal-koxy02,4-diketo-decane-3-carboxylic acid alkylester of the general formula IV is obtained. The 7-carbalkoxy-heptanoyl chloride of the general formula III is prepared by producing a semiester from suberic acid in the known way, and then heat-in the obtained 7-carbalkoxyheptanoic acid with thionyl chloride until the acid chloride of the general formula III
is formed. For the preparation of the compound of formula IV
expediently 7-carbomethoxyheptanoyl chloride, a known compound (J. Am. Chem. Soc. 78, 2451 /1956/) is used. The 10-carbal-koxy-2,4-diketodecane-3-carboxylic acid alkylester of the general formula IV is prepared by producing the sodium deri-vative of the acetoacetic acid aklylester of the general formula II and adding a 7-carbalkoxyheptanoyl chloride of the general formula III immediately to the reaction mixture.
When purifying the crude product it is of advantage to observe that on treating a 10=carbalkoxy-2,4-diketodecane-3-carboxylic acid aklyester of the general formula IV with a saturated solution of potassium carbonate or a saturated sodium solution according _ 1053683 to the method of S. Archer and M. G. Pratt (J. Am. Chem.
Soc. 66, 1656 /1944/), an alkali metal derivative isolable from the by-products formed at the formation of the compound of the general formula IV can be produced. However, the purification of the crude product is not needed from the aspect of the continuation of the synthesis because the crude product can be used directly for the preparation of 9-carbomethoxy-3-ketononanic acid methylester of the formula V.
The 10-carbalkoxy-2,4-diketodecane-3-carboxylic acid alkylester of the general formula IV is converted at room temperature on the effect of a solution of sodium methylate, as a result of a partial decomposition to acid and of transesterification, into 9-carbomethoxy-3-ketononanic acid methylester of the formula V. The crude product obtained by this reaction can be purified by fractionated distillation.
The 9-carbomethoxy-3-ketononanic acid methylester of formula V can be readily halogenated at the C2-atom enclosed between the keto group and the carbomethoxy group. Chlorination in a carbon tetrachloride medium with 1.0-1.2 moles of sulphuryl chloride proved to be favourable.
On reacting the halogenated product, 9-carbomethoxy-2-halo-3-ketononanic acid methylester of the general formula VI with thioacid amides of the general formula VII, 4-(6-carbome-thoxyhexyl)-thiazole-5-carboxylic methylester of the general formula VIII is obtained which carries hydrogen or an alkyl group on C2. Thiazole formation is completed in one hour when the 9-carbomethoxy-2-chloro-3-ketononanic acid methylester of formula VI is boiled in methanol with 1.0-1.2 moles of a thioacid amide of the , , .~3 , , general formula VII. On subjecting the crude product, obtained by the extraction with ether of the reaction mixture neutralized with sodium carbonate solution, to purification by column chromatography or preparative thin layer chromato-graphy, an analytically pure compound of the general formula VIII can be obtained.
The 4-(6-carboxyhexyl)-thiazole-5-carboxylic acid of the general formula IX which carries hydrogen or an alkyl group on C2 can preferably prepared by the direct hydrolysis of the crude compound of the general formula VIII. Hydro-lysis is carried out preferably with an alkali hydroxide.
Saponification with 2.5-3.5 moles of sodium hydroxide is completed in an ethanolic-aqueous medium at boiling temperature in 0.5-1.0 hour. The product of saponification, that is the 4-(6-carboxyhexyl)-thiazole-5-carboxylic acid of the gene-ral formula IX, which carries hydrogen or an alkyl group on C2, is purified by recrystallization.
On investigating the possibility of the trans-eQterification of the carboxyl group located in the ring and at the terminal C-atom of the chain of the compound of the general formula IX it has been found that esterification w-ith aliphatic alcohols in the presence of p-toluene-sulphonic acid as catalyst takes place at room temperature only in case of the terminal carboxyl group. This recognition is essential from the aspect of the synthesis. Namely, the free carboxyl group located in the ring of the 4-(6-carbal-koxyhexyl)-thiazole-5-carboxylic acid of the general formula X, which carries hydrogen or an alkyl group on C2 and posses-ses a protected terminal carboxyl group as obtained by the `selective esterification, can be converted into an acid chloride in a selective way.
-The acid chloride of the general formula XI is _9_ ~ . . , - ~ . - ~ - , ` - . - ':
produced by reacting the compound of the general formula X
expediently with oxalyl chloride in a benzenic medium at room temperature. However, also other known methods for the production of acid chlorides can be applied.
The 4-(6-carbalkoxyhexyl)-5-hydroxymethyl thiazole of the general formula XII which carries hydrogen or an alkyl group on C2 is obtained by reducing an acid chloride of the general formula XI with an alkali metal borohydride. Reduc-tion is carried out expediently in a dioxane medium with 1.5-2.0 moles of sodium borohydride.
The 4-(6-carbalkoxyhexyl)-thiazole-5-carbaldehyde of the general formula XIII which carries hydrogen or an alkyl group on C2 is produced by gentle oxidation of the hydroxyl group of the compound of the general formula XII. A very favourable way of carrying out this oxidation is the method of Collins et al. (Tetrahedron Letters 1968, 3363), using a chromium trioxide-pyridine complex in a dichloromethane medium.
The 4-(6-carbalkoxyhexyl)-5~(3-keto-1-trans-octenyl)-thlazole of the general formula Ia which carries hydrogenor an alkyl group on C2 is prepared by Wittig reaction from the compound of the general formula XIII. 2-oxo-heptylidene triphenyl phosphorane prepared in the way described by M.P.L.
Caton et al. (Tetrahedron Letters 1972, 773) can be favourably applied as Witting reagent. The compound of the general formula XIII is converted on the effect of 2.5 moles of 2-oxo-heptylidene triphenyl phosphorane under stirring at room temperature in 16 hours into a compound of the general formula Ia which latter can be separated from the triphenyl-phosphine oxide formed during the reaction and from theresidual excess of 2-oxo-heptylidene triphenyl phosphorane by column chromatography or by preparative thin layer . :. . . -chromatography.
According to method b), 4-(6-carbalkoxyhexyl)-thiazole-5-carbaldehyde of the general formula XIII, which carries hydrogen or an alkyl group on C2, is prepared direct-ly from the acid chloride of the general formula XI by reduc-tion with lithium tri-tert.butoxy-aluminium hydride. This reduction is carried out expediently in a medium of anhydrous tetrahydrofuran at -50 C.
According to method c), 4-(6-carbalkoxyhexyl)-thia-zole-5-carbaldehyde of the general formula XIII, which carries hydrogen or an alkyl group on C2, is converted into 4-(6-carbalkoxyhexyl)-5-(3-keto-1-trans-octenyl)-thiazole of the general formula Ia, which carries hydrogen or an alkyl group on C2, by reacting with the sodium derivative of 2-oxo-heptylphosphonic acid dimethylester. The latter compound can be prepared expediently in the way described by E. J. Corey et al. (J. Am. Chem. Soc. 90, 3247 /1968/).
The 4-(6-carboxyhexyl)-5-(3-keto-1-trans-octenyl)-thiazole of the general formula Ib, which carries hydrogen or an alkyl group on C2, is obtained by the hydrolysis of the corresponding compound of formula Ia. According to our investigation~ enzymatic hydrolysis is more favourable than chemical methods. It proved to be of advantage to apply esterase enzymes of microbiological origin, e.g. the lipase enzyme produced by the fungus Rhizopus oryzae and prepared according to Hungarian Patent Specification No. 160,109, for the hydrolysis of the compound of the general formula Ia. The enzymatic hydrolysis can be preferably carried out in a phosphate buffer of pH 7.5. To improve the dispersi-bility of the compound to be hydrolyzed it is advantageousto add gum arabic and the sodium salt of taurocholic acid to the reaction mixture. The ester group of the compound . ~
.~ . : . , .
.
of the general formula Ia can be saponified also with an alkali hydroxide. However, slight decomposition occurs even under mild conditions when the reaction is carried out at room temperature under nitrogen atmosphere. Consequently, the attainable yield is lower than that of the enzymatic hydrolysis.
The 4-(6-carbalkoxyhexyl)-5-(3-hydroxy-1-trans-octenyl)-thiazole of the general formula Ic, which carries hydrogen or an alkyl group on C2, can be prepared from the corresponding compound of general formula Ia by reduction with an alkali metal borohydride. The ketone group of the compound of the general formula Ia is reduced in an aqueous-propanolic medium by 0.5 mole of sodium borohydride at room temperature in 2 hours.
The 4-(6-carboxyhexyl)-5-(3-hydroxy-1-trans-octenyl)-thiazole of the general formula Id, which carries hydrogen or an alkyl group on C2, is obtained by reducing the correspond-ing compound of general formula Ib with an alkali metal horohydride. This reaction proceeds slower than the reduction of the compound of the general formula Ia; it requires at room temperature in an aqueous propanolic medium even in the presence of 2 moles of sodium borohydride about 16 hours.
The compound of the general formula Id can be produced more favourably by the enzymatic hydrolysis of the corresponding ; compound of general formula Ic. The enzymatic hydrolysis is carried out in the way already specified at the hydrolysis of the compound of the general formula Ia.
The 4-(6-carbalkoxyhexyl)-5-(3-acyloxy-1-trans-octenyl)-thiazole of the general formula Ie, which carries hydrogen or an alkyl group on C2, is prepared by esterification of the hydroxyl group of the corresponding compound of general for-mula Ic. Esterification can be carried out by known methods, . .
such as treatment with acid anhydrides or acid chlorides, as well. The hydroxyl group can be esterified under mild conditions, e.g. it can be acetylated in a pyridine medium at room temperature with acetic anhydride.
The structure ofthecompounds produced by the process according to the invention is unequivocally confirmed by the data of the IR, NMR and mass spectra specified in the following Examples.
On investigating the biological properties of the compounds of the general formula I prepared according to the invention it has been found that they have prostaglandin_ like effects on certain organs. From the aspect of therapeu-tic application it is essential that their action is more selective than that of native prostaglandins. They possess the valuable property of inhibiting the activity of enzymes inducing the decomposition of prostaglandins in the organism and thus they promote the rise of the endogenous level of pro~taglandins.
To illustrate the prostaglandin-like effect of the compounds of general formula I the effects of 4-(6-carboxy-hexyl)-5-(3-hydroxy-1-trans-octenyl)-thiazole (Id, Rl = H) on rat uterus and on stripes of rat stomach muscle, further on rat fat tissue are described. Muscle contractions were measured by the method of W. H. Newton (J. Physiol. (London) 79, 301 /1933/) whereas lipolysis appearing in the fat tissue was measured by the method of G. Cseh et al. (Acta Biochim.
Biophys. Acad, Sci. Hung. 8, 245 /1973/).
a) The compound used in a concentration of 0.01,ug/
ml induced the contraction of rat uterus suspended in a Krebs-Ringer solution containing 0.2 % of glucose which exhibitedno spontaneous cont~actions.
b) The compound in concentrations above 0.1,ug/ml - -increased, as a function of the concentration, the size and frequency ofthe rhythmical contractions of rat uterus suspen-ded in the physiological nutrient solution specified under point a).
c) From the aspect of the effect on the uterus the compound exhibited synergism with prostaglandins.
d) On applying the compound in a concentration of 0.001 ,ug/ml it decreased the lipolysis of the epididymal fat tissue of rats induced by 0.01 ,ug/ml of isopropylnorodrenalin.
It has been observed further that the activity of the enzyme 15-hydroxyprostaglandin dehydrogenase responsible for the inactivation of the native prostaglandins is competitively inhibited by the compounds of formula Ib and Id, such as 4-(6-carboxyhexyl)-5-(3-keto-1-trans-octenyl~-thiazole and 4-(6-carboxyhexyl)-5-(3-hydroxy-1-trans-octenyl)-thiazole. In accordance with this observation it has been experienced that the prostaglandin content of the rat uterine horn incubated at 37C in a Krebs-Ri~er solution of O.2 %
glucose content is significantly increased by adding 4-(6-carboxyhexyl)-5-(3-hydroxy-1-trans-octenyl)-thiazole (Id, Rl = H) to the solution. The effect of the investigated compounds on 15-hydroxyprostaglandin dehydrogenase was determined by the method of M. A. Marrazzi and F. M.
~atschinsky (Prostaglandins 1, 373 /1972/), whereas the prostaglandin content of rat uterus by the method of N. Gilmore et al. (Nature 218, 1135 /1968j).
The process according to the invention is further illustrated by the following non-limiting Examples.
Exam~le 1 Prepa~ation of 4-(6-carbomethoxyhexyl)-5-(3-keto-1-trans-octenyl)-thiazole (Ia, Rl = H) a) 10 Carbomethoxy-2,4-diketodecane-3-carboxylic acid ethylester (IV) Small portions of 3.45 g of metallic sodium cut to minute pieces were added in 2 hours under stirring to a solution of 19.5 g of acetoacetic ethylester (II) in 250 ml of anhydrous benzene, then stirring was continued for another 3 hours until the reaction with sodium was completed. The obtained suspension was treated under stirring with 31 g of 7-carbomethoxyheptanoyl chloride (III) added dropwise in 30 minutes. Subsequently the reaction mixture was stirred for further 30 minutes and boiled for 15 minutes. On cooling, the reaction mixture was poured onto a 10 % iced sulphuric acid solution. The benzene phase of the acidified reaction mixture wau separoted, wsshed with water ' . .
/
,/''~ ' ; ' //
/
until neutral and dried on sodium sulphate. On removing b~nz~ne by vacuum distillation, 44.5 g of a crude product containin6 10-carbomethoxy-2,4-diketodecane-3-carboxylic acid ethylester (IV) were obtained which could be w ed wlthout rurther purirication ~or the preparation of 9~
¢arbomethoxy-3-ketononanic acid meth~lester (V) according to polnt b).
10-Carbomethox~-2,4-diketodecane-3-carboxylic acid ethylester (IV) o~ analytical purity was prepared as rollows. ~he solution Or 10 g of the crude product in 40 ml Or diethyl ether was shaken with 40 ml Or saturated potassium carbonate solution. ~he pota6sium derivative of 10-carbo-~ methoxy-2,4-dlketodecane-3-carboxylic acid ethyIester ~eparated as an oil located between the ethereal and the agueous phases. On separating this oil it wa~ acidified with a 10 ~ sulphuric acid solution and the obtained ~olutio~
oxtracted with diethyl ether. The ethereal extract washed with wator until neutra} and dried on sodium sulphate. On removing ether by vacuum distillation 6.5 g of a distillation ~o~idue co~taining 10-carbomethoxy-2,4-diketodecane-3-oarboxylic ethylestor (IV)~ were obtained. ~hi~ residue was purified by preparati~e thin layer chromatography on a silica gel layer with the use of a running solvent misture of 40 ~ ethyl acetate and 60 % n-heptan~.
I~ spectrum ($ilm): ~ C~ 2990-2860~ 0-0 1735, 1705,
25 a}~yl group, or ac~lating ~he compound Or the:general . ' .~rm~la Ic (reactio~ :scheme 6) to 4-(6-carbalkoxyhe~y1)-5-.` (3-aoyloxy-1-trans-ootenyl)-thiazole o~ the general ~ormula `' Io~wherel~ R1 8tand8 for a h~1rogen atom or an alkJl 6roup and ~2 .itand~-for an al4yl g~oup.
~Q In.methodl a~'roi-s~nthesising the compounds Or the -: . . - ~ .
general formula I the starting material is an acetoacetic alkylester of the general formula II, preferably the readily available acetoacetic ethylester, and suberic acid (hexane-1,6-dicarboxylic acid).
The acetoacetic ester is converted into its sodium derivative by stirring the ester for 3-5 hours with sodium metal cut to small pieces, in a medium of anhydrous benzene or anhydrous ether. On reacting the sodium derivative of the acetoacetic ester with 7-carbalkoxyheptanoyl chloride of the general formula III prepared from suberic acid, a 10-carbal-koxy02,4-diketo-decane-3-carboxylic acid alkylester of the general formula IV is obtained. The 7-carbalkoxy-heptanoyl chloride of the general formula III is prepared by producing a semiester from suberic acid in the known way, and then heat-in the obtained 7-carbalkoxyheptanoic acid with thionyl chloride until the acid chloride of the general formula III
is formed. For the preparation of the compound of formula IV
expediently 7-carbomethoxyheptanoyl chloride, a known compound (J. Am. Chem. Soc. 78, 2451 /1956/) is used. The 10-carbal-koxy-2,4-diketodecane-3-carboxylic acid alkylester of the general formula IV is prepared by producing the sodium deri-vative of the acetoacetic acid aklylester of the general formula II and adding a 7-carbalkoxyheptanoyl chloride of the general formula III immediately to the reaction mixture.
When purifying the crude product it is of advantage to observe that on treating a 10=carbalkoxy-2,4-diketodecane-3-carboxylic acid aklyester of the general formula IV with a saturated solution of potassium carbonate or a saturated sodium solution according _ 1053683 to the method of S. Archer and M. G. Pratt (J. Am. Chem.
Soc. 66, 1656 /1944/), an alkali metal derivative isolable from the by-products formed at the formation of the compound of the general formula IV can be produced. However, the purification of the crude product is not needed from the aspect of the continuation of the synthesis because the crude product can be used directly for the preparation of 9-carbomethoxy-3-ketononanic acid methylester of the formula V.
The 10-carbalkoxy-2,4-diketodecane-3-carboxylic acid alkylester of the general formula IV is converted at room temperature on the effect of a solution of sodium methylate, as a result of a partial decomposition to acid and of transesterification, into 9-carbomethoxy-3-ketononanic acid methylester of the formula V. The crude product obtained by this reaction can be purified by fractionated distillation.
The 9-carbomethoxy-3-ketononanic acid methylester of formula V can be readily halogenated at the C2-atom enclosed between the keto group and the carbomethoxy group. Chlorination in a carbon tetrachloride medium with 1.0-1.2 moles of sulphuryl chloride proved to be favourable.
On reacting the halogenated product, 9-carbomethoxy-2-halo-3-ketononanic acid methylester of the general formula VI with thioacid amides of the general formula VII, 4-(6-carbome-thoxyhexyl)-thiazole-5-carboxylic methylester of the general formula VIII is obtained which carries hydrogen or an alkyl group on C2. Thiazole formation is completed in one hour when the 9-carbomethoxy-2-chloro-3-ketononanic acid methylester of formula VI is boiled in methanol with 1.0-1.2 moles of a thioacid amide of the , , .~3 , , general formula VII. On subjecting the crude product, obtained by the extraction with ether of the reaction mixture neutralized with sodium carbonate solution, to purification by column chromatography or preparative thin layer chromato-graphy, an analytically pure compound of the general formula VIII can be obtained.
The 4-(6-carboxyhexyl)-thiazole-5-carboxylic acid of the general formula IX which carries hydrogen or an alkyl group on C2 can preferably prepared by the direct hydrolysis of the crude compound of the general formula VIII. Hydro-lysis is carried out preferably with an alkali hydroxide.
Saponification with 2.5-3.5 moles of sodium hydroxide is completed in an ethanolic-aqueous medium at boiling temperature in 0.5-1.0 hour. The product of saponification, that is the 4-(6-carboxyhexyl)-thiazole-5-carboxylic acid of the gene-ral formula IX, which carries hydrogen or an alkyl group on C2, is purified by recrystallization.
On investigating the possibility of the trans-eQterification of the carboxyl group located in the ring and at the terminal C-atom of the chain of the compound of the general formula IX it has been found that esterification w-ith aliphatic alcohols in the presence of p-toluene-sulphonic acid as catalyst takes place at room temperature only in case of the terminal carboxyl group. This recognition is essential from the aspect of the synthesis. Namely, the free carboxyl group located in the ring of the 4-(6-carbal-koxyhexyl)-thiazole-5-carboxylic acid of the general formula X, which carries hydrogen or an alkyl group on C2 and posses-ses a protected terminal carboxyl group as obtained by the `selective esterification, can be converted into an acid chloride in a selective way.
-The acid chloride of the general formula XI is _9_ ~ . . , - ~ . - ~ - , ` - . - ':
produced by reacting the compound of the general formula X
expediently with oxalyl chloride in a benzenic medium at room temperature. However, also other known methods for the production of acid chlorides can be applied.
The 4-(6-carbalkoxyhexyl)-5-hydroxymethyl thiazole of the general formula XII which carries hydrogen or an alkyl group on C2 is obtained by reducing an acid chloride of the general formula XI with an alkali metal borohydride. Reduc-tion is carried out expediently in a dioxane medium with 1.5-2.0 moles of sodium borohydride.
The 4-(6-carbalkoxyhexyl)-thiazole-5-carbaldehyde of the general formula XIII which carries hydrogen or an alkyl group on C2 is produced by gentle oxidation of the hydroxyl group of the compound of the general formula XII. A very favourable way of carrying out this oxidation is the method of Collins et al. (Tetrahedron Letters 1968, 3363), using a chromium trioxide-pyridine complex in a dichloromethane medium.
The 4-(6-carbalkoxyhexyl)-5~(3-keto-1-trans-octenyl)-thlazole of the general formula Ia which carries hydrogenor an alkyl group on C2 is prepared by Wittig reaction from the compound of the general formula XIII. 2-oxo-heptylidene triphenyl phosphorane prepared in the way described by M.P.L.
Caton et al. (Tetrahedron Letters 1972, 773) can be favourably applied as Witting reagent. The compound of the general formula XIII is converted on the effect of 2.5 moles of 2-oxo-heptylidene triphenyl phosphorane under stirring at room temperature in 16 hours into a compound of the general formula Ia which latter can be separated from the triphenyl-phosphine oxide formed during the reaction and from theresidual excess of 2-oxo-heptylidene triphenyl phosphorane by column chromatography or by preparative thin layer . :. . . -chromatography.
According to method b), 4-(6-carbalkoxyhexyl)-thiazole-5-carbaldehyde of the general formula XIII, which carries hydrogen or an alkyl group on C2, is prepared direct-ly from the acid chloride of the general formula XI by reduc-tion with lithium tri-tert.butoxy-aluminium hydride. This reduction is carried out expediently in a medium of anhydrous tetrahydrofuran at -50 C.
According to method c), 4-(6-carbalkoxyhexyl)-thia-zole-5-carbaldehyde of the general formula XIII, which carries hydrogen or an alkyl group on C2, is converted into 4-(6-carbalkoxyhexyl)-5-(3-keto-1-trans-octenyl)-thiazole of the general formula Ia, which carries hydrogen or an alkyl group on C2, by reacting with the sodium derivative of 2-oxo-heptylphosphonic acid dimethylester. The latter compound can be prepared expediently in the way described by E. J. Corey et al. (J. Am. Chem. Soc. 90, 3247 /1968/).
The 4-(6-carboxyhexyl)-5-(3-keto-1-trans-octenyl)-thiazole of the general formula Ib, which carries hydrogen or an alkyl group on C2, is obtained by the hydrolysis of the corresponding compound of formula Ia. According to our investigation~ enzymatic hydrolysis is more favourable than chemical methods. It proved to be of advantage to apply esterase enzymes of microbiological origin, e.g. the lipase enzyme produced by the fungus Rhizopus oryzae and prepared according to Hungarian Patent Specification No. 160,109, for the hydrolysis of the compound of the general formula Ia. The enzymatic hydrolysis can be preferably carried out in a phosphate buffer of pH 7.5. To improve the dispersi-bility of the compound to be hydrolyzed it is advantageousto add gum arabic and the sodium salt of taurocholic acid to the reaction mixture. The ester group of the compound . ~
.~ . : . , .
.
of the general formula Ia can be saponified also with an alkali hydroxide. However, slight decomposition occurs even under mild conditions when the reaction is carried out at room temperature under nitrogen atmosphere. Consequently, the attainable yield is lower than that of the enzymatic hydrolysis.
The 4-(6-carbalkoxyhexyl)-5-(3-hydroxy-1-trans-octenyl)-thiazole of the general formula Ic, which carries hydrogen or an alkyl group on C2, can be prepared from the corresponding compound of general formula Ia by reduction with an alkali metal borohydride. The ketone group of the compound of the general formula Ia is reduced in an aqueous-propanolic medium by 0.5 mole of sodium borohydride at room temperature in 2 hours.
The 4-(6-carboxyhexyl)-5-(3-hydroxy-1-trans-octenyl)-thiazole of the general formula Id, which carries hydrogen or an alkyl group on C2, is obtained by reducing the correspond-ing compound of general formula Ib with an alkali metal horohydride. This reaction proceeds slower than the reduction of the compound of the general formula Ia; it requires at room temperature in an aqueous propanolic medium even in the presence of 2 moles of sodium borohydride about 16 hours.
The compound of the general formula Id can be produced more favourably by the enzymatic hydrolysis of the corresponding ; compound of general formula Ic. The enzymatic hydrolysis is carried out in the way already specified at the hydrolysis of the compound of the general formula Ia.
The 4-(6-carbalkoxyhexyl)-5-(3-acyloxy-1-trans-octenyl)-thiazole of the general formula Ie, which carries hydrogen or an alkyl group on C2, is prepared by esterification of the hydroxyl group of the corresponding compound of general for-mula Ic. Esterification can be carried out by known methods, . .
such as treatment with acid anhydrides or acid chlorides, as well. The hydroxyl group can be esterified under mild conditions, e.g. it can be acetylated in a pyridine medium at room temperature with acetic anhydride.
The structure ofthecompounds produced by the process according to the invention is unequivocally confirmed by the data of the IR, NMR and mass spectra specified in the following Examples.
On investigating the biological properties of the compounds of the general formula I prepared according to the invention it has been found that they have prostaglandin_ like effects on certain organs. From the aspect of therapeu-tic application it is essential that their action is more selective than that of native prostaglandins. They possess the valuable property of inhibiting the activity of enzymes inducing the decomposition of prostaglandins in the organism and thus they promote the rise of the endogenous level of pro~taglandins.
To illustrate the prostaglandin-like effect of the compounds of general formula I the effects of 4-(6-carboxy-hexyl)-5-(3-hydroxy-1-trans-octenyl)-thiazole (Id, Rl = H) on rat uterus and on stripes of rat stomach muscle, further on rat fat tissue are described. Muscle contractions were measured by the method of W. H. Newton (J. Physiol. (London) 79, 301 /1933/) whereas lipolysis appearing in the fat tissue was measured by the method of G. Cseh et al. (Acta Biochim.
Biophys. Acad, Sci. Hung. 8, 245 /1973/).
a) The compound used in a concentration of 0.01,ug/
ml induced the contraction of rat uterus suspended in a Krebs-Ringer solution containing 0.2 % of glucose which exhibitedno spontaneous cont~actions.
b) The compound in concentrations above 0.1,ug/ml - -increased, as a function of the concentration, the size and frequency ofthe rhythmical contractions of rat uterus suspen-ded in the physiological nutrient solution specified under point a).
c) From the aspect of the effect on the uterus the compound exhibited synergism with prostaglandins.
d) On applying the compound in a concentration of 0.001 ,ug/ml it decreased the lipolysis of the epididymal fat tissue of rats induced by 0.01 ,ug/ml of isopropylnorodrenalin.
It has been observed further that the activity of the enzyme 15-hydroxyprostaglandin dehydrogenase responsible for the inactivation of the native prostaglandins is competitively inhibited by the compounds of formula Ib and Id, such as 4-(6-carboxyhexyl)-5-(3-keto-1-trans-octenyl~-thiazole and 4-(6-carboxyhexyl)-5-(3-hydroxy-1-trans-octenyl)-thiazole. In accordance with this observation it has been experienced that the prostaglandin content of the rat uterine horn incubated at 37C in a Krebs-Ri~er solution of O.2 %
glucose content is significantly increased by adding 4-(6-carboxyhexyl)-5-(3-hydroxy-1-trans-octenyl)-thiazole (Id, Rl = H) to the solution. The effect of the investigated compounds on 15-hydroxyprostaglandin dehydrogenase was determined by the method of M. A. Marrazzi and F. M.
~atschinsky (Prostaglandins 1, 373 /1972/), whereas the prostaglandin content of rat uterus by the method of N. Gilmore et al. (Nature 218, 1135 /1968j).
The process according to the invention is further illustrated by the following non-limiting Examples.
Exam~le 1 Prepa~ation of 4-(6-carbomethoxyhexyl)-5-(3-keto-1-trans-octenyl)-thiazole (Ia, Rl = H) a) 10 Carbomethoxy-2,4-diketodecane-3-carboxylic acid ethylester (IV) Small portions of 3.45 g of metallic sodium cut to minute pieces were added in 2 hours under stirring to a solution of 19.5 g of acetoacetic ethylester (II) in 250 ml of anhydrous benzene, then stirring was continued for another 3 hours until the reaction with sodium was completed. The obtained suspension was treated under stirring with 31 g of 7-carbomethoxyheptanoyl chloride (III) added dropwise in 30 minutes. Subsequently the reaction mixture was stirred for further 30 minutes and boiled for 15 minutes. On cooling, the reaction mixture was poured onto a 10 % iced sulphuric acid solution. The benzene phase of the acidified reaction mixture wau separoted, wsshed with water ' . .
/
,/''~ ' ; ' //
/
until neutral and dried on sodium sulphate. On removing b~nz~ne by vacuum distillation, 44.5 g of a crude product containin6 10-carbomethoxy-2,4-diketodecane-3-carboxylic acid ethylester (IV) were obtained which could be w ed wlthout rurther purirication ~or the preparation of 9~
¢arbomethoxy-3-ketononanic acid meth~lester (V) according to polnt b).
10-Carbomethox~-2,4-diketodecane-3-carboxylic acid ethylester (IV) o~ analytical purity was prepared as rollows. ~he solution Or 10 g of the crude product in 40 ml Or diethyl ether was shaken with 40 ml Or saturated potassium carbonate solution. ~he pota6sium derivative of 10-carbo-~ methoxy-2,4-dlketodecane-3-carboxylic acid ethyIester ~eparated as an oil located between the ethereal and the agueous phases. On separating this oil it wa~ acidified with a 10 ~ sulphuric acid solution and the obtained ~olutio~
oxtracted with diethyl ether. The ethereal extract washed with wator until neutra} and dried on sodium sulphate. On removing ether by vacuum distillation 6.5 g of a distillation ~o~idue co~taining 10-carbomethoxy-2,4-diketodecane-3-oarboxylic ethylestor (IV)~ were obtained. ~hi~ residue was purified by preparati~e thin layer chromatography on a silica gel layer with the use of a running solvent misture of 40 ~ ethyl acetate and 60 % n-heptan~.
I~ spectrum ($ilm): ~ C~ 2990-2860~ 0-0 1735, 1705,
4 o_o 1240 cm~1 -DM~ 8p~0trum (¢al4): ~ W ~2 4.38, 4.15 (2 H? q~ J - 7.5 Hz~, -~ ~ 3~62 ~3 ~ ..8~ 3 C~2(CeO) 2~67 (2 E, t, J ~ 7 Hz~, ~ 2~28;~2 ~t ~ J - 7 Ez3, ~ CH3(C-0) 2.32 (3 H, 8),
5 ~ 1.9-1.25 (8 H, m), ~ CH3 1.~5 (3 H, ~, J =. 7.5 Hz) ppm.
b) 9-Carbomethoxy-3-ketononanic acid methylester (V) A solution of sodium methylate prepared form 3.45 g of sodium and 100 ml of anhydrous methanol was added to 44,5 g of the crude product of 10-carbomethoxy-2,4-diketodecane-3-carboxylic acid ethylester (IV). The reaction mixture was allowed to stand 16 hours at room temperature, then poured onto a 10 % iced sulphuric acid solution. The acidified aqueous reaction mixture was extracted with diethyl ether, the ethereal extract dried on sodium sulphate, then ether distilled off under vacuum. On subjecting the obtained distillation residue to fractional distillation, 22.5 g of 9-carbomethoxy-3-ketononanic acid methylester (V) were obtained.
B.p.: 160C at 0.4 torr.
Infrared spectrum (film) :~ CH 2980-2860,~C=0-1732, ~ C-O 1250 cm~l.
NMR spectrum (CC14): ~ OCH3 3.7 (3H, s), 3.62 (3 H, s), CH2(C=O) 3.35 (2 H, s), 2.6-2.0 (4 ~, m), ~ CH2 1.9-1.2 (8 H, m) ppm.
c) 9-Carbomethoxy-2-chloro-3-ketononanic acid methyl-ester (VI) The solution of 22.2 g of 9-carbomethoxy-3-ketonona-nic acid methylester (V) in 20 ml of carbon tetrachloride was cooled to -5C and the solution of 14.7 g of sulphuryl chloride in 10 ml of carbon tetrachloride was added drop-wise to the solution. The reaction mixture was stirred for 30 minutes at -5 C, then for 30 minutes at room temperature and finally for 30 minutes at 60C. On cooling, the reaction mixture was diluted with 100 ml of diethyl ether, then washed with a 5 % solution of sodium hydrogen carbonate and finally with water. On removing the solvent ~y distillation, 22.6 g of crude 9-carbomethoxy-2-chloro-3-;.
-. '' , .. - , ketononanic acid methyiester (VI) were obtained which could be used without any further purification for the preparation of 4-(6-carbomethoxy-hexyl)-thiazole-5-carboxylic acid methyl-egter (VIII, Rl = H) according to point d). The fractional distillation of the crude product yielded 17 g of 9-carbomethoxy-2-chloro-3-ketononanic acid methylester (VI) of analytical purity.
B.p. : 155C at 0.3 torr.
IR spectrum (film) :~ CH 3000-2860,~ C=O 1735, ~ C-O 1255 cm 1.
NMR spectrum (CC14) : ~ CH(Cl ) 4.7 (1 H, s), ~ OCH3 3.8 (3 H, s), 3.6 (3 H, s), ~ CH2 (C=O) 2.68 (2 H, t, J = 7 Hz), 2.25 (2 H, t, J = 7 Hz), ~ CH2 1.9-1.1 (8 H, m) ppm.
d) 4-(Carbomethoxyhexyl)-thiazole-5-carboxylic acid methylester (VIII, Rl - H) 16.8 g of 9-carbomethoxy-2-chloro-3-ketononanic acid methylester (VI) and 4.5 g of thioformamide (VII, Rl - H ) were boiled in 90 ml of methanol for one hour then methanol wa9 distilled off under vacuum, and the distillation residue was dissolved in 150 ml of 2 N hydrochloric acid. The obtained solution was neutralized with a 5% solution of sodium carbonate, saturated with ammonium sulphate and extrac-ted with 3 x 150 ml of diethyl ether. The ethereal extract was dried on sodium sulphate, then ether was distilled off in vacuum. Thus 16 g of crude 4-(6-carbomethoxyhexyl)-thiazole-5-carboxylic acid methylester (VIII, Rl = H) were obtained which could be used without any further purification for the production of 4-(6-carboxyhexyl)-thiazole-5-carboxylic acid (IX, Rl = H) according to point e).
On subjecting the crude product to purification by preparative thin layer chromatography and using a silicagel layer as adsorvent and a mixture of 60 % ethyl acetate and 40 % n-heptane as running solvent, 4-(6-carbomethoxyhexyl)-,~ -18-thiazole-5-carboxylic acid methylester (VIII, Rl = H) of analytical purity was obtained.
IR spectrum (film) : ~CH 3000-2860,~ C=O 1740, 1715, C-O 1270 cm 1.
NMR spectrum (CC14) :S~ CH (thiazole) 8.7 (1 H, s) "~ OCH3 3.85 (3 H, s), 3.6 (3 H, s), ~ CH2(vicinal to the ring) 3.15 (2 H, t, J =~Hz), ~ CH2 (C=o) 2.25 (2 H, t, J = 7 Hz), CH2 1.95-1.1 (8 H, m) ppm.
e) 4-(6-Carboxyhexyl)-thiazole-5carboxylic acid (IX, Rl = H) To the solution of 16 g of crude 4-(6-carbomethoxy-hexyl)-thiazole-5-carboxylic acid methylester (VIII, Rl = H) in 50 ml of ethanol 100 ml of 2 N sodium hydroxide solution was added, the reaction mixture was boiled for 30 minutes, then acidified with 5 ~ sulphuric acid under ice-cooling.
On extracting the aqueous reaction mixture with 3 x 150 ml ethyl acetate, the extract was dried on sodium sulphate and evaporated in vacuum. Recrystallization of the obtained crude product from diethylether afforded 9.4 g of 4-(6-car-boxyhexyl)-thiazole-5-carboxylic acid (IX, Rl = H).
M,p. : 151-153 C.
t~ ~ IR spectrum (KBr) : ~ CH 3080, ~ CH 2980-2860,1~ C=O 1720cm NMR spectrum (CDC13 ~ D~iSO-d6) : ~ ~ CH (thiazole) 8.85 (1 H, s) COOH 8.65 (2 H),~ CH2(vicinal to the ring) 3.2 (2 H, t, J = 7 Hz), ~ CH2 (C=O) 2.25 (2 H, t, J = 7 Hz), CH2 1.95 - 1.0 (8 H, m) ppm.
f) 4-(6-Carbomethoxyhexyl)-thiazole-5-carboxylic acid -~- (x, Rl = H) 9.2 g of 4-(6-carboxyhexyl)-thiazole-5-carboxylic acid (IX, Rl = H) and 10.2 g of p-toluenesulphonic acid mono-hydrate were dissolved in 400 ml of methanol. The obtained .
, , --19--reaction mixture was stirred for 2 hours at room temperature, then poured onto one liter water. After saturating the aqueous solution with ammonium sulphate it was extracted with 3 x 400 ml of ethyl acetate, then the ethyl acetate extract was washed with water, dried on sodium sulphate and evaporated in vacuum. Recrystallization of the obtained crude product from a mixture of diethyl ether and n-hexane afforded 7.9 of 4-(6-carbomethoxyhexyl)-thiazole-5-carboxylic acid (X, Rl = H).
M.p. : 113-114 C.
IR spectrum (KBr) ~ CH 3090,~ CH 3000-2860, C=O 1730, 1705, C-O 1260 cm~l .
NMR spectrum (CDC13) : ~ COOH 11.45 (1 H), ~CH (thiazole) 9.0 (1 H, s),~ OCH3 3.65 (3 H, s),~ CH2 (vicinal to the ring) 3.25 (2 H, t, J = 7.5 Hz), ~ CH2 (C=O) 2.3 (2 H, t, J = 7 Hz), ~ CH2 2.0-1.15 (8 H, m) ppm.
g) 4-(6-Carbomethoxyhexyl)-5-hydroxymethyl-thiazole (XII, Rl = H).
To the solution of 7.75 g of 4-(6-carbomethoxyhexyl)-thiazole-5-carboxylic acid (X, Rl = H) in 100 ml of anhydrous benzene 8 ml of oxalyl chloride were added dropwise and the reaction mixture was allowed to stand overnight at room temperature, then the benzene and the excess oxalyl chloride were distilled off under vacuum. The obtained evaporation residue containing 4-(6-carbomethoxyhexyl)-thiazole-5-` carboxylic chloride (XI, Rl = H) was dissolved in 20 ml anhydrous dioxane and the obtained solution was added drop-wise, under stirring, to a suspension of 2.14 g of sodium borohydride in 40 ml of anhydrous dioxane. The stirring of t~e reaction mixture was continued for 30 minutes at room : temperature and then for further 30 minutes at 80C. When the reaction mixture cooled to room temperature, 50 ml of water were dropwise added under cooling with ice, then stirring was .
~. . . - . - - , .
.
continued at room temperature for 2 hours. Subsequently the aqueous reaction mixture was extracted with 3 x 50 ml of ethyl acetate, the ethyl acetate extract was dried on sodium sulphate and evaporated in vacuum, yielding 6.7 g of crude product.
On subjecting the crude product to purification by preparative thin layer chromatography, with the use of a silica gel layer and a mixture of 70 % ethyl acetate and 30 %
n-heptane as running solvent, 4-(6-carbomethoxyhexyl)-5-hydro-xymethyl-thiazole (XII, Rl = H) of analytical purity was obtained.
IR spectrum (film) :~ OH 3300,~ CH 2995-2860, C=O 1735, ~ C-O 1250 cm~l.
NMR spectrum (CC14)~ ~ CH (thiazole) 8.5 (1 H, s), ~ CH2(OH) 4.72 (2 H, s), S OH 4.35 (1 H), ~ OCH3 3.6 (3 H, ~ CH2 (vicinal to the ring) 2.65 (2 H, t, J = 7 Hz), d CH2 (c=o) 2.22 (2 H, t, J = 7 Hz),~ CH2 1.9-1 (8 H, m) ppm.
.
h) 4-(6-Oarbomethoxghex~l)-thi~zol~ c~rbsldeh;~e (XIII, R1 ' ~I) ~he 60lutlon Or 6.4 g o~ crude 4-(6-oarbomethoxyhex~l)-5-h~drox;srmeth~lthlszole (~2II, R1 ~ H) ln 60 ml o~ dlohloro-methane was dropwi~e. adde~, under stlrrint, to the ~olution o~ 40 g Or chromium trioxl~e-~tp~rldlne oo~le~c ln 800 ml of ~ichloromethane. .8t~rring Or the reactlon mixture wa~
continued for 30 mlnutes, then the reaction mixture was filtered and the filtrate evaporatea in va¢uum. '~he evaporation residue was treated in 50 ml of hot methanol with active carbon, the filtered methanolic solution was e:l~aporated, and the obtained 4.95 g crude 4-~6-carbo-m'ethoxyhex;~ thiazole-5-carbaldeh~de (~III, R1 ~ ~I) were recr;srstallized from dieth;gl ether.
15 M.p.: 60-62. C.
IR epectrum (l~Br): jJ ;~¢E 3090, ~ CH 3000-2850, ~ C~O 1730, 1660, L' c_o 1260 c~
1~ spectrum (ODCl3): J'C~I0 10.2 (1 E, 8), S~CH (thiazole) 9.d6 (1 ~, 8), 5 OaH3 3.7 (3 E, 8), ~ C~I2 (vicinal to the ring) 3.2 (2 E, t, J - 7.5 Ez), S CE2(C.0) 2.35 (2 lI, ~, J - 7.5 HZ), ~ CE2 2.05-1.1 (8 E, m) ppm.
~a8~ spectrum: molecular weight 255.
Ma~e number oi~ the c.~ acteri~tic ion~ (m/e): 255, 226, 224, ~2, 154, 140, 127, 126, 112, 99.
i~ Carbom~thox~he~yl)-5-(3-keto-1-trans-Qcten;~l)-~hiazole (Ia, ~1 ~ E~
' . '!I~.solution o~ 4~8 ~ of 4-~6-carbometho~arhex~
'` ` t~azole-5-¢arbalde~de (~
.
2-oxohe~?t r1idene triphell;yl phosphorane in 25 ml o~ carbon -: .3~ e*~ohloride was ~tirred under nitro~en curr~t at room .
~' .
-- 23 _ -temperature for 16 hours. During this time the 4(6-carbo-methoxyhexyl)-thi~zole-5-carbaldehyde (~III, R1 H) cOmpletely converted into 4-(6-carbomethox~hexyl)-5-(3-keto-1-trans-octenyl)-thiazole (I~ R1 ~ H). ~he latter compound was separated by column chromatography from the triphenyl pho~phine oxide formed during the reaction and from the residual excess of 2-oxoheptylidene triphenyl pho8phorane. A column prepared rro~ 200 g 9iliC acid was used for this ~eparation. Elution was carried out with mixtures of n-heptane and eth~l acetate whose conte~t of ethyl acetate was succe~sively increased. The product was eluted from the ¢olumn with n-heptane containing 25 % of ethyl acetate.
In this way 5.~ of 4-(6-carbomethoxyhexyl)-5-(3-keto-1-trans-octenyl)-thiazole of analytical purity (Ia, R1 H) were obtained.
r~ spectrum (fi~1m): ~ 7fCH 3080, ~ CH 2095-2860~ ~ C~ 1735, ~685-1660, V C~O 1595, v C-O 1250 cm 1.
NMR 6pectrum (CCl43:~ ~ CH ¢hiazole) 8.55 (1 H, 8)~ S C~CH
7.5~ 6.3 (2 H, q, ~ - 15 ~z), ~ OC~3 3.55 (3 ~, s), ~ CH2 -(~icinal to the ring) 2.85 (2 H, t, J - 6 Hz), ~ CH2(C~O) 2.5 (2 H~ t~ J ~ 6 Hz), 2.2 (2 H, t~ J - 6 Hz), ~ CH2 ~.95-1.1 (14 H! m), ~ CH3 0.9 (3 H, t~ J - 4 Hz) ppm.
Mass spectrum: molecular weight 351.
Ma~8 uumber of characteristic ion~ (m/e): 351, 320, 295, 280j 278j 252, 236, 223, 222, 208j 152, 138, 124.
amPle 2 Preparation of 4-(6-carbomethoxyheæyl)-5-(3-keto-1-trans-octenyl)-thiazole (Ia, R1 H) 2.9 g of 4-(6-carbomethoxyhexyl)-thiazole-5-csrboxylic 3o chloride (~ 1 e H) obtained in the way de~cribed i~ poi~t .
~053683 g) of Example 1 were dissolved in 25 ml of anhydrous tetra-hydrofuran. ~o this solution cooled to -50 C a solution of 2.5 g of lithium,tri-tert.bu~oxy-aluminium hydride in 10 ml of anhydrous tetra~drofuran was added dropwise under ~tirring. ~he reaction mixture was stirred for an hour at 50 C, then allowed to take up room temperature and poured onto 100 ml of ice-water. The aqueou~ reaction mixture was extracted with 3 x 50 ml of diethylether, the extract dri~d on sodium sulphate and the solvent evaporated.
~he obtained 3 g evaporation residue which cont~ined 4-(6-carbomethoxyhex~ thiazole-5-carbaldehyde (XIII, R1 - ~) was purified by preparative thin layer chromatograph~, with the use of a silicagel layer as adsorbent and a mlxture of 40 % ethyl acetate and 60 % n-heptane as running solvent.
In ~his way 1.25 g of 4-(6-carbomethoxyhexyl)-thiazole-5-carbaldeh~de (~III, R1 ~ H) described in point h) of Example 1 were obtained.
From 4-(6-carbomethoxyhexyl)-thiazole-5-oarbaldehyde (XIII, Rl = ~) 4-(6-carbomethoxyhex~1)-5-(3-keto-1-trans-octenyl)-thiazole (Ia, ~1 = H) was prepared in the way ~pecified in point i) of ~xample 1.
- Example 3 - Preparation of 2-methyl-4-(6-carbomethoxyhexyl)-5-(3-keto-1-trans-octen~ thiazole (Ia, ~1 = CH3) : 25 : a) 2-Neth~1-4-(6-carbomethoxyh~xyl)-thiazole-5-oarboxylic acid methylester (VIII, R1 ~ CH3~
8.4 g of 9Lcarbomethoxy-?-chloro-3-ketononanic acid ;methylester (VI) and 2.5 g of thioacet~mide (VII, R1 = CH3) ~ were boiled in 50 ml methanol for one hour, then methanol - 3o was evaporated in vacuum and the evaporation residue .
. .
dissolved in 75 ml of 2 N hydrochloric acid. m e obtained solution was neutralized with a 5 % solution of sodium carbo-nate and saturated with ammonium sulphate, then extracted with 3 x 75 ml of diethyl ether. After drying the ethereal extract on sodium sulphate, it was evaporated in vacuum, affording 8.2 g of a crude product containing 2-methyl-4-(6-carbomethoxyhexyl)-thiazole-5-carboxylic acid methylester (VIII, Rl = CH3) which could be used without any further purification for the preparation of 2-methyl-4-(6-carboxy-hexyl)-thiazole-5-carboxylic acid (IX, Rl = CH3) according to point b) of this Example.
On purifying the crude product by preparative thin layer chromatography with the use of a silicagel layer as adsorbent and a mixture of 60 % ethyl acetate and 40 %
n-heptane as running solvent, 2-methyl-4-(6-carbomethoxyhexyl)-thiazole-5-carboxylic acid methylester (VIII, Rl = CH3) of analytical purity was obtained.
IR spectrum (film): ~ CH 3000-2860,~ C=O 1735, 1720, ~ C-O 1270 cm~l.
NMR spectrum (CC14) : ~ OCH3 3.82 (3 H, s), 3.6 (3 H, s) ~ CH2 (vicinal to the ring) 3.05 (2 H, t, J = 7 Hz), ~ CH3 2,65 (3 H, s),~ CH2(C=O) 2.25 (2 H, t, J = Hz), CH2 1.95-1.15 (8 H, m) ppm.
b) 2-Methyl-4-(6-carboxyhexyl)-thiazole-5-carboxylic acid (IX, Rl = CH3) The solution of a 8 g of crude 2-methyl-4-(6-carbo-methoxyhexyl)-thiazole-5-carboxylic acid methylester (VIII, Rl = CH3) in 25 ml ethanol was treated with 40 ml of 2 N
sodium hydroxide solution. The reaction mixture was boiled ~ for 30 minutes, then acidified with 5 N sulphuric acid under ice-cooling. After extracting the aqueous reaction mixture with 3 x 75 ml of ethyl acetate, the extract was dried on sodium sulp}late and evaporated in vacuum. The obtained crude product was recrystallized from a mixture of acetone and n-hexane, affording 5.3 g of 2-methyl-4-(6-carboxyhexyl)-thia-zole-5-carboxylic acid (IX, Rl = CH3).
M.p. : 147-149 C.
IR spectrum (KBr) : ~ OH (carboxylic acid) 3300-2200, C=O 1685 cm~l.
NMR spectrum ~DC~ + DMSO-d6) : ~ COOH 9.0 (2 H), ~ CH2 (vicinal to the ring) 3.08 (2 H, t, J = 7 Hz), ~ CH3 2.65 (3 H, s), ~ CH2(C=O) 2.25 (2 H, t, J = 7 Hz), ~CH2 1.95-l.l (8 H, m) ppm.
c) 2-Methyl-4-(6-carbomethoxyhexyl)-thiazole-5-carboxylic acld (X, Rl ~ CH3) 5.15 g of 2-methyl-4-(6-carboxyhexyl)-thiazole-5-carboxylic acid (IX, Rl = CH3) and 5.4 g of p-toluenesulphonic acid monohydrate were dissolved in 200 ml of methanol. The reaction mixture was stirred for 2 hours at room temperature, then poured onto 500 ml of water. On saturating the aqueous solution with ammonium sulphate it was extracted with 3 x 200 ml of ethyl acetate, the ethyl acetate extract was washed with water, dried on sodium sulphate and evaporated in vacuum. Recrystallization of the obtained crude product from a mixture of diethyl ether and n-hexane afforded 4.3 g of 2-methyl-4-(6-carbomethoxyhexyl)-thiazole-5-carboxylic acid [X, Rl = CH3).
M.p.: 106-107 C.
IR spectrum (KBr) : ~ OH (carboxylic acid) 3200-2200, C=O 1735, 1695, ~ C-O 1235 cm~l .
NMR spectrum (CDC13) : ~ COOH 11.45 (1 H), ~ OCH3 3.65 (3 H, s),~ CH2 (vicinal to the ring) 3.2 ~2 H, t, J = 7.5 Hz), CH3, 2.75 (3 H, s), ~ CH2(C-O) 2.25 (2 H, t, J = 7.5 Hz), ~CH2 2.0-1.05 (8 H, m) ppm.
d) 2-Methyl-4(6-carbome~hoxyhexyl~5-hydroxymethyl-thiazole (XII, Rl = CH3 ) To the solution of 4.15 g of 2-methyl-4-(6-carbo-methoxyhexyl)-thiazole-5-carboxylic acid (X, Rl = CH3) in 50 ml of anhydrous benzene 4.2 ml of oxalyl chloride were added dropwise, and the reaction mixture was allowed to stand overnight at room temperature, then benzene and excess oxalyl chloride were distilled off in vacuum. The obtained residue which contained 2-methyl-4-(6-carbomethoxyhexyl)-thiazole-5-carboxylic chloride (XI, Rl = CH3) was dissolved in 20 ml ofanhydrous dioxane, and a suspension of 1.1 g of sodium boro-hydride in 20 ml of anhydrous dioxane was added dropwise to the solution under continuous stirring. Stirring of the reaction mixture was continued for 30 minutes at room temperature and for further 60 minutes at 80C. When the reaction mixture was cooled to room temperature, 25 ml of water were dropwise added under ice-cooling to the reaction mixture, and stirring was continued for 2 hours at room temperature. Subsequently, the aqueous reaction mixture was extracted with 3 x 50 ml of ethyl acetate. The ethyl acetate extract was dried over sodium sulphate and evaporated under vacuum, yielding 2.95 of crude product.
On purifying the crude product by preparative thin layer chromatography, using a silicagel layer as adsorbent and a mixture of 70 % ethyl acetate and 30% n-heptane as running solvent, 2-methyl-4-(6-carbomethoxyhexyl)-5-hydroxy-methyl-thiazole (XII, Rl = CH3 ) of analytical purity was obtained.
IR spectrum (film) : ~ OH 3300, ~ CH 30OO -2860, ~C=O
1735, bc-o 1255,b C-O (H) 1020 cm~l.
NMR spectrum (CC14) : ~ CH2 (OH) 4.62 (2 H, S),s OH 4-22 (1 H) ,~ OCH3 3.62 (3 H, s) ~ CH3 2.6 (3 H, s) ,S CH2 (vicinalto the ring) 2.59 (2 H, t, J = 7.5 HZ), ~ CH2 (C=0) 2.25 (2 H, t, J = 7 Hz), ~ CH2 1.95-1.1 (8 H, m) ppm.
e) 2-Methyl-4-(6-carbomethoxyhexyl)-thiazole-5-carbaldehyde (XIII, Rl = CH3) The solution of 2.8 g of crude 2-methyl-4-(6-carbo-methoxyhexyl)-5-hydroxymethyl thiazole (XII, Rl = CH3) in 25 ml of dichloromethane was dropwise added to the solution of 16 g chromium trioxide-dipyiridine complex in 320 ml of dichloromethane. Stirring of the reaction mixture was con-tinued for 30 minutes, then the reaction mixture was filtered and the filtrate was evaporated in vacuum. After purifying the crude product obtained as evaporation residue , by pre-parative thin layer chromatography using silicagel ~ayer as adsorbent and a mixture of 50% ethyl acetate and 50 % of n-heptane as running solvent, 2.15 g of 2-methyl-4-(6-carbo-methoxyhexyl)-thiazole-5-carbaldehyde (XIII, Rl = CH3) were obtained.
IR spectrum (film) : ~ CH 2995-2860, ~ C=0 1732, 1660, C-0 1255 cm 1.
NMR spectrum (CC14) : ~ CH0 10.0 (1 H, s),~ OCH3 3.61 (3 H, s),S CH2Cvicinal to the ring) 3.0 (2 H, t, J = 7.5 Hz), CH3 2.7 (3 H, s),~S CH2(C=0) 2.25 (2 H, t, J = 7 Hz).
~ CH2 1.95-1.1 (8 H, m) ppm.
Mass spectrum : molecular weight 269.
Mass number of characteristic ions (m/e) : 269, 240, 238, 196, 168, 154, 141, 113.
f) 2-Methyl-4-(6-carbomethoxyhexyl)-5-(3-keto-1-trans-cotenyl)-thiazole (Ia, Rl = CH3) 2 g of 2-methyl-4-(6-carbomethoxyhexyl)-thiazole-5-carbaldehyde (XIII, Rl = CH3) and 7 g of 2-oxoheptylidene-triphenyl phosphorane were dissolved in 15 ml of carbon tetrachloride. The reaction mixture was stirred for 16 hours under nitrogen current. During this time the 2-methyl-4-(6-carbomethoxyhexyl)-thiazole-5-carbaldehyde (XIII, Rl = CH3) was completely converted into 2-methyl-4-(6-carbomethoxyhexyl)-5-(3-keto-1-trans-octenyl)-thiazole (Ia, Rl = CH3). The latter compound was separated by preparative thin layer chroma-tography from the triphenyl phosphine oxide formed during the reaction and from the residual excess of 2-oxoheptylidene tri-phenyl phosphorane. For the separation a silicagel layer was used as adsorbent and a mixture of 50 % ethyl acetate and 50%
n-heptane as running solvent. In this way 2.1 g of 2-methyl-4-(6-carbomethoxyhexyl)-5-(3-keto-1-trans-oc-tenyl)-thiazole (Ia, Rl = CH3) were obtained.
IR spectrum (film) :1 CH 3000-2860, ~ C=O 1735, 1685-1660, C=C 1592,~ C-O 1250 cm~l.
NMR spectrum (CC14) : ~ CH=CH 7.52, 6.22 (2 H, q, J = 15.5 Hz), ~ OCH3 3.61 (3 H, s), ~ CH2 (vicinal to the ring) 2.78 (2 H, t, J = 6.5 Hz), ~ CH3 2.63 (3 H, s),~ CH2(C=O) 2.5 (2 H, t, J = 7 Hz), 2.25 (2 H, t, J = 7 Hz), ~ CH2 1.95-1.1 (14 H, m) ~ CH3 0.95 (3 H, t, J = 6 Hz) ppm.
Mass spectrum molecular weight 365.
Mass number of characteristic ions (m/e) : 365, 334, 309, 294, 292, 266, 250, 237, 236, 222, ~66, 152, 138.
Example 4 Preparation of 2-methyl-4-(6-carbomethoxyhexyl)-5-(3-keto-1-trans-octenyl)-thiazole (Ia, Rl = CH3) To a suspension of 0,45 g of sodium hydride in 5 ml of anhydrous 1,2-dimethoxy-ethane a solution of 4.12 g of 2-oxoheptylphosphonic acid dimethyl ester in 20 ml 1,2-dime-thoxy-ethane was added under stirring at room temperature.
The reaction mixture was stirred for an hour, then a solution of 1 g of 2-methyl-4-(6-carbomethoxyhexyl)-thiazole-5-carbal-dehyde (XIII, Rl = CH3) prepared according to point e) of Example 2, in 10 ml of dimethoxy-ethane was added dropwise, and stirring was continued for 5 hours. After dropwise, adding 30 ml of water under ice-cooling to the reaction mixture, it was extracted with 3 x 20 ml of diethyl ether. The extract was dried on sodium sulphate and evaporated in vacuum. The evaporation residue was purified by preparative thin layer chromatography, using a silicagel layer as adsorbent and a mixture of 40 % ethyl acetate and 60 % n-heptane as running solvent. The yield was 0.81 g of 2-methyl-4-(6-carbometho-xyhexyl)-5-(3-keto-1-trans-octenyl)-thiazole (Ia, Rl = CH3) of chromatographic purity.
Example 5 Preparation of 4-(6-carboxyhexyl)-5-(3-keto-1-trans-octenyl)-thiazole (Ib, Rl = H) .
- 31 _ To a ~uspension of 2.65 g of 4-(6-carbomethoxyhexyl)-5-(3-keto-1-trans-octenyl)-thiazole (I~, R1 H) in 50 ml of a 0.2 M phosphate buffer of pH 7.5, 265 mg of lipa~e enz~me of an activit~ of 40 U/mg, prepared with the fungus Rhizopus or~Tzae, 26 mg of the sodium salt of taurocholic acid, and 2.6 ml of a 10 Yo solution of gum arabic were added. ~he mixture was then shaken at 25 C in a screening shaker desk at 260 revolutions,'minute and an amplitude of 2 cm for 24 hours. ~hen the reaction mixture was diluted with 100 ml of water, acidified with citric acid and extracted with 3 x 75 ml of ethyl acetate. ~he ethyl acetate extract was dried on sodium sulphate and evaporated in vacuum. The obtained 2.95 g evaporation residue were purified by chrom~tography on a column prepared with lOO g of ~licic acid, eluting with mixtures of n-heptane and ethyl acetate whose ethyI acetate c~ntent wa~ stepwise increa~ed. 4-(6-Carboxyhexyl)-5-~3-keto-1-trans-octenyl)-thiazole ~Ib, R1 = H) was eluted from the co~umn b~ a mixture consisting of 60 ~ ethyl acetate and 40 ~ ~-heptane, `affording thus 1.8 g of a product of chromatographic purity which was recryætallized from acetone.
M~p,: 67-68 C.
IR pectrum (XBr): ~ OH (carboxylic acid) 3200-2300, ~ 7~H
3095, iJ C~ 3000-2860, ~ C=O 1713, 1690, ~JC=C 1590 cm 1~
2~ NMR spectrum (CDCl3): ~ COOH 10.9 (1 H), ~ ~y CH (thiazole) 8.8 (1H~ CH=CH 7.72, 6.52 (2 H, q, J = 15.5 Hz), - S CE2 (~icinal to the ring) 2.9 (2 H, t, J = 7 Ezj, ~CH2(C-0) 2.65 (2 E, t, J = 7 Hz), 2.32 (2 H, t, J = 7 Hz), S CH2 2.05-1~1 (14 H, m), S CH3 0.88 (3 E, t, J = 6 Hz) ppm.
3o Ma~s spectrum: molecular weight 337.
.
M~s number of ch~r~ct~rl~tie ions (m/e): 337, 281, 27B, 266, 238, 236~ 223, 20~ 152.
,Exsm~le 6 ~rQ~aratlon o~ 4-~6-c~r~ox~hexyl)-5-~3-koto-1-tr~n~-octen~ thl~ole tIb, R~ ~ H) 2 ml o~ 1 N ~o~lum hydroxl~o was tropw~se ~d~ed undor ~ltrogen atmosphere and under lce-coollng to a ~olution of 175 m6 Of 4-(6-carbomethox~hex~l)-5-(3-keto-1-tran~-octsnyl)-thiazole (Ia, R1 ~ ~) in 5 ml of ethanol. ~he solution was subsequently stirred for 1.5 hours at room temperature.
~hen the reaction mixture was poured onto 30 ml of ice-water, acidified with 1 N hydrochloric acid and extracted with 3 x 15 ml of ethyl acetate. ~he ethyl acetate extract was dried over sodium sulphate and evaporated under vacuum.
~he evaporatlon residue was purified by preparative thin layer chromatography, using a silicagel layer as adsorbent and the organic phase of a mixture of 110 ml of ethyl aoetate, 50 ml of n-hepta~e, 100 ml of water and 20 ml of acetic acid as running solvent. In this way 71 mg of 2Q 4~(6-carboxyhexyl~)-5-(3-keto-1-trans-octenyl)-thiazole (Ib, R1 ~ ~) f ohromatographic purity were obtained. The m.p. and spectroscopical data of the product agreed with those ~pecified in Example 5 ~xample 7 Preparation of 2-methyl-4-(6-carboxyhexyl)-5-(3-keto-~~ lttrans-octenyl)-thiazole (Ibj R1 = CH3) ~o a sugpension of 912 mg of 2-methyl-4-(6-carbo-methoxyhexyl)-5-(3-keto_1-trans-octenyl)-thiazole (Ia, R~ - CH3) in 20 ml of 0.2 M phosphate buffer of pE 7.5, 90 mg of the Iipase enzyme specified in Example 5, 9 mg ~053683 - ~3 -of the æo~ium æalt of t~urocholic acid and 0.9 ml of a 1 '~
~o]ution of gum ar~bic were added~ The mixture was then ~haken at 25 ~C in a æcreening æhaker de~k Qt 260 revolu-tio~min~te and an amplitude'of 2 cm for 24 hours. ~en ~he reaction mixture was diluted with 50 ml of water, acidified with citric acid and extracted with 3 x 40 ml of eth~71 acetate. ~he ethyl ~cetate extract was dried o~er æodium æulphate and evaporated under ~acuum. ~he obtained 1.03gevaporation residue were puri'fied ~y preparative thin layer chromatography in the way specified in Example 6. ~hu~', 645 mg of 2-methyl-4-(6-carboxyhexyl)-5-(3-keto-1-trans-octen~ thiazole (Ib, R1 = CH3) were obtained .
; IR spectrum (film): ~OH (carboxylic acid~ 3500-2400, ~ CH 2995-2860, ~ C=O 1720, 1680, Y C-C 1590 cm 1.
NMR spectrum (CCl4): ~ COOH 10.4 (1 E), S CH-CH 7.45,
b) 9-Carbomethoxy-3-ketononanic acid methylester (V) A solution of sodium methylate prepared form 3.45 g of sodium and 100 ml of anhydrous methanol was added to 44,5 g of the crude product of 10-carbomethoxy-2,4-diketodecane-3-carboxylic acid ethylester (IV). The reaction mixture was allowed to stand 16 hours at room temperature, then poured onto a 10 % iced sulphuric acid solution. The acidified aqueous reaction mixture was extracted with diethyl ether, the ethereal extract dried on sodium sulphate, then ether distilled off under vacuum. On subjecting the obtained distillation residue to fractional distillation, 22.5 g of 9-carbomethoxy-3-ketononanic acid methylester (V) were obtained.
B.p.: 160C at 0.4 torr.
Infrared spectrum (film) :~ CH 2980-2860,~C=0-1732, ~ C-O 1250 cm~l.
NMR spectrum (CC14): ~ OCH3 3.7 (3H, s), 3.62 (3 H, s), CH2(C=O) 3.35 (2 H, s), 2.6-2.0 (4 ~, m), ~ CH2 1.9-1.2 (8 H, m) ppm.
c) 9-Carbomethoxy-2-chloro-3-ketononanic acid methyl-ester (VI) The solution of 22.2 g of 9-carbomethoxy-3-ketonona-nic acid methylester (V) in 20 ml of carbon tetrachloride was cooled to -5C and the solution of 14.7 g of sulphuryl chloride in 10 ml of carbon tetrachloride was added drop-wise to the solution. The reaction mixture was stirred for 30 minutes at -5 C, then for 30 minutes at room temperature and finally for 30 minutes at 60C. On cooling, the reaction mixture was diluted with 100 ml of diethyl ether, then washed with a 5 % solution of sodium hydrogen carbonate and finally with water. On removing the solvent ~y distillation, 22.6 g of crude 9-carbomethoxy-2-chloro-3-;.
-. '' , .. - , ketononanic acid methyiester (VI) were obtained which could be used without any further purification for the preparation of 4-(6-carbomethoxy-hexyl)-thiazole-5-carboxylic acid methyl-egter (VIII, Rl = H) according to point d). The fractional distillation of the crude product yielded 17 g of 9-carbomethoxy-2-chloro-3-ketononanic acid methylester (VI) of analytical purity.
B.p. : 155C at 0.3 torr.
IR spectrum (film) :~ CH 3000-2860,~ C=O 1735, ~ C-O 1255 cm 1.
NMR spectrum (CC14) : ~ CH(Cl ) 4.7 (1 H, s), ~ OCH3 3.8 (3 H, s), 3.6 (3 H, s), ~ CH2 (C=O) 2.68 (2 H, t, J = 7 Hz), 2.25 (2 H, t, J = 7 Hz), ~ CH2 1.9-1.1 (8 H, m) ppm.
d) 4-(Carbomethoxyhexyl)-thiazole-5-carboxylic acid methylester (VIII, Rl - H) 16.8 g of 9-carbomethoxy-2-chloro-3-ketononanic acid methylester (VI) and 4.5 g of thioformamide (VII, Rl - H ) were boiled in 90 ml of methanol for one hour then methanol wa9 distilled off under vacuum, and the distillation residue was dissolved in 150 ml of 2 N hydrochloric acid. The obtained solution was neutralized with a 5% solution of sodium carbonate, saturated with ammonium sulphate and extrac-ted with 3 x 150 ml of diethyl ether. The ethereal extract was dried on sodium sulphate, then ether was distilled off in vacuum. Thus 16 g of crude 4-(6-carbomethoxyhexyl)-thiazole-5-carboxylic acid methylester (VIII, Rl = H) were obtained which could be used without any further purification for the production of 4-(6-carboxyhexyl)-thiazole-5-carboxylic acid (IX, Rl = H) according to point e).
On subjecting the crude product to purification by preparative thin layer chromatography and using a silicagel layer as adsorvent and a mixture of 60 % ethyl acetate and 40 % n-heptane as running solvent, 4-(6-carbomethoxyhexyl)-,~ -18-thiazole-5-carboxylic acid methylester (VIII, Rl = H) of analytical purity was obtained.
IR spectrum (film) : ~CH 3000-2860,~ C=O 1740, 1715, C-O 1270 cm 1.
NMR spectrum (CC14) :S~ CH (thiazole) 8.7 (1 H, s) "~ OCH3 3.85 (3 H, s), 3.6 (3 H, s), ~ CH2(vicinal to the ring) 3.15 (2 H, t, J =~Hz), ~ CH2 (C=o) 2.25 (2 H, t, J = 7 Hz), CH2 1.95-1.1 (8 H, m) ppm.
e) 4-(6-Carboxyhexyl)-thiazole-5carboxylic acid (IX, Rl = H) To the solution of 16 g of crude 4-(6-carbomethoxy-hexyl)-thiazole-5-carboxylic acid methylester (VIII, Rl = H) in 50 ml of ethanol 100 ml of 2 N sodium hydroxide solution was added, the reaction mixture was boiled for 30 minutes, then acidified with 5 ~ sulphuric acid under ice-cooling.
On extracting the aqueous reaction mixture with 3 x 150 ml ethyl acetate, the extract was dried on sodium sulphate and evaporated in vacuum. Recrystallization of the obtained crude product from diethylether afforded 9.4 g of 4-(6-car-boxyhexyl)-thiazole-5-carboxylic acid (IX, Rl = H).
M,p. : 151-153 C.
t~ ~ IR spectrum (KBr) : ~ CH 3080, ~ CH 2980-2860,1~ C=O 1720cm NMR spectrum (CDC13 ~ D~iSO-d6) : ~ ~ CH (thiazole) 8.85 (1 H, s) COOH 8.65 (2 H),~ CH2(vicinal to the ring) 3.2 (2 H, t, J = 7 Hz), ~ CH2 (C=O) 2.25 (2 H, t, J = 7 Hz), CH2 1.95 - 1.0 (8 H, m) ppm.
f) 4-(6-Carbomethoxyhexyl)-thiazole-5-carboxylic acid -~- (x, Rl = H) 9.2 g of 4-(6-carboxyhexyl)-thiazole-5-carboxylic acid (IX, Rl = H) and 10.2 g of p-toluenesulphonic acid mono-hydrate were dissolved in 400 ml of methanol. The obtained .
, , --19--reaction mixture was stirred for 2 hours at room temperature, then poured onto one liter water. After saturating the aqueous solution with ammonium sulphate it was extracted with 3 x 400 ml of ethyl acetate, then the ethyl acetate extract was washed with water, dried on sodium sulphate and evaporated in vacuum. Recrystallization of the obtained crude product from a mixture of diethyl ether and n-hexane afforded 7.9 of 4-(6-carbomethoxyhexyl)-thiazole-5-carboxylic acid (X, Rl = H).
M.p. : 113-114 C.
IR spectrum (KBr) ~ CH 3090,~ CH 3000-2860, C=O 1730, 1705, C-O 1260 cm~l .
NMR spectrum (CDC13) : ~ COOH 11.45 (1 H), ~CH (thiazole) 9.0 (1 H, s),~ OCH3 3.65 (3 H, s),~ CH2 (vicinal to the ring) 3.25 (2 H, t, J = 7.5 Hz), ~ CH2 (C=O) 2.3 (2 H, t, J = 7 Hz), ~ CH2 2.0-1.15 (8 H, m) ppm.
g) 4-(6-Carbomethoxyhexyl)-5-hydroxymethyl-thiazole (XII, Rl = H).
To the solution of 7.75 g of 4-(6-carbomethoxyhexyl)-thiazole-5-carboxylic acid (X, Rl = H) in 100 ml of anhydrous benzene 8 ml of oxalyl chloride were added dropwise and the reaction mixture was allowed to stand overnight at room temperature, then the benzene and the excess oxalyl chloride were distilled off under vacuum. The obtained evaporation residue containing 4-(6-carbomethoxyhexyl)-thiazole-5-` carboxylic chloride (XI, Rl = H) was dissolved in 20 ml anhydrous dioxane and the obtained solution was added drop-wise, under stirring, to a suspension of 2.14 g of sodium borohydride in 40 ml of anhydrous dioxane. The stirring of t~e reaction mixture was continued for 30 minutes at room : temperature and then for further 30 minutes at 80C. When the reaction mixture cooled to room temperature, 50 ml of water were dropwise added under cooling with ice, then stirring was .
~. . . - . - - , .
.
continued at room temperature for 2 hours. Subsequently the aqueous reaction mixture was extracted with 3 x 50 ml of ethyl acetate, the ethyl acetate extract was dried on sodium sulphate and evaporated in vacuum, yielding 6.7 g of crude product.
On subjecting the crude product to purification by preparative thin layer chromatography, with the use of a silica gel layer and a mixture of 70 % ethyl acetate and 30 %
n-heptane as running solvent, 4-(6-carbomethoxyhexyl)-5-hydro-xymethyl-thiazole (XII, Rl = H) of analytical purity was obtained.
IR spectrum (film) :~ OH 3300,~ CH 2995-2860, C=O 1735, ~ C-O 1250 cm~l.
NMR spectrum (CC14)~ ~ CH (thiazole) 8.5 (1 H, s), ~ CH2(OH) 4.72 (2 H, s), S OH 4.35 (1 H), ~ OCH3 3.6 (3 H, ~ CH2 (vicinal to the ring) 2.65 (2 H, t, J = 7 Hz), d CH2 (c=o) 2.22 (2 H, t, J = 7 Hz),~ CH2 1.9-1 (8 H, m) ppm.
.
h) 4-(6-Oarbomethoxghex~l)-thi~zol~ c~rbsldeh;~e (XIII, R1 ' ~I) ~he 60lutlon Or 6.4 g o~ crude 4-(6-oarbomethoxyhex~l)-5-h~drox;srmeth~lthlszole (~2II, R1 ~ H) ln 60 ml o~ dlohloro-methane was dropwi~e. adde~, under stlrrint, to the ~olution o~ 40 g Or chromium trioxl~e-~tp~rldlne oo~le~c ln 800 ml of ~ichloromethane. .8t~rring Or the reactlon mixture wa~
continued for 30 mlnutes, then the reaction mixture was filtered and the filtrate evaporatea in va¢uum. '~he evaporation residue was treated in 50 ml of hot methanol with active carbon, the filtered methanolic solution was e:l~aporated, and the obtained 4.95 g crude 4-~6-carbo-m'ethoxyhex;~ thiazole-5-carbaldeh~de (~III, R1 ~ ~I) were recr;srstallized from dieth;gl ether.
15 M.p.: 60-62. C.
IR epectrum (l~Br): jJ ;~¢E 3090, ~ CH 3000-2850, ~ C~O 1730, 1660, L' c_o 1260 c~
1~ spectrum (ODCl3): J'C~I0 10.2 (1 E, 8), S~CH (thiazole) 9.d6 (1 ~, 8), 5 OaH3 3.7 (3 E, 8), ~ C~I2 (vicinal to the ring) 3.2 (2 E, t, J - 7.5 Ez), S CE2(C.0) 2.35 (2 lI, ~, J - 7.5 HZ), ~ CE2 2.05-1.1 (8 E, m) ppm.
~a8~ spectrum: molecular weight 255.
Ma~e number oi~ the c.~ acteri~tic ion~ (m/e): 255, 226, 224, ~2, 154, 140, 127, 126, 112, 99.
i~ Carbom~thox~he~yl)-5-(3-keto-1-trans-Qcten;~l)-~hiazole (Ia, ~1 ~ E~
' . '!I~.solution o~ 4~8 ~ of 4-~6-carbometho~arhex~
'` ` t~azole-5-¢arbalde~de (~
.
2-oxohe~?t r1idene triphell;yl phosphorane in 25 ml o~ carbon -: .3~ e*~ohloride was ~tirred under nitro~en curr~t at room .
~' .
-- 23 _ -temperature for 16 hours. During this time the 4(6-carbo-methoxyhexyl)-thi~zole-5-carbaldehyde (~III, R1 H) cOmpletely converted into 4-(6-carbomethox~hexyl)-5-(3-keto-1-trans-octenyl)-thiazole (I~ R1 ~ H). ~he latter compound was separated by column chromatography from the triphenyl pho~phine oxide formed during the reaction and from the residual excess of 2-oxoheptylidene triphenyl pho8phorane. A column prepared rro~ 200 g 9iliC acid was used for this ~eparation. Elution was carried out with mixtures of n-heptane and eth~l acetate whose conte~t of ethyl acetate was succe~sively increased. The product was eluted from the ¢olumn with n-heptane containing 25 % of ethyl acetate.
In this way 5.~ of 4-(6-carbomethoxyhexyl)-5-(3-keto-1-trans-octenyl)-thiazole of analytical purity (Ia, R1 H) were obtained.
r~ spectrum (fi~1m): ~ 7fCH 3080, ~ CH 2095-2860~ ~ C~ 1735, ~685-1660, V C~O 1595, v C-O 1250 cm 1.
NMR 6pectrum (CCl43:~ ~ CH ¢hiazole) 8.55 (1 H, 8)~ S C~CH
7.5~ 6.3 (2 H, q, ~ - 15 ~z), ~ OC~3 3.55 (3 ~, s), ~ CH2 -(~icinal to the ring) 2.85 (2 H, t, J - 6 Hz), ~ CH2(C~O) 2.5 (2 H~ t~ J ~ 6 Hz), 2.2 (2 H, t~ J - 6 Hz), ~ CH2 ~.95-1.1 (14 H! m), ~ CH3 0.9 (3 H, t~ J - 4 Hz) ppm.
Mass spectrum: molecular weight 351.
Ma~8 uumber of characteristic ion~ (m/e): 351, 320, 295, 280j 278j 252, 236, 223, 222, 208j 152, 138, 124.
amPle 2 Preparation of 4-(6-carbomethoxyheæyl)-5-(3-keto-1-trans-octenyl)-thiazole (Ia, R1 H) 2.9 g of 4-(6-carbomethoxyhexyl)-thiazole-5-csrboxylic 3o chloride (~ 1 e H) obtained in the way de~cribed i~ poi~t .
~053683 g) of Example 1 were dissolved in 25 ml of anhydrous tetra-hydrofuran. ~o this solution cooled to -50 C a solution of 2.5 g of lithium,tri-tert.bu~oxy-aluminium hydride in 10 ml of anhydrous tetra~drofuran was added dropwise under ~tirring. ~he reaction mixture was stirred for an hour at 50 C, then allowed to take up room temperature and poured onto 100 ml of ice-water. The aqueou~ reaction mixture was extracted with 3 x 50 ml of diethylether, the extract dri~d on sodium sulphate and the solvent evaporated.
~he obtained 3 g evaporation residue which cont~ined 4-(6-carbomethoxyhex~ thiazole-5-carbaldehyde (XIII, R1 - ~) was purified by preparative thin layer chromatograph~, with the use of a silicagel layer as adsorbent and a mlxture of 40 % ethyl acetate and 60 % n-heptane as running solvent.
In ~his way 1.25 g of 4-(6-carbomethoxyhexyl)-thiazole-5-carbaldeh~de (~III, R1 ~ H) described in point h) of Example 1 were obtained.
From 4-(6-carbomethoxyhexyl)-thiazole-5-oarbaldehyde (XIII, Rl = ~) 4-(6-carbomethoxyhex~1)-5-(3-keto-1-trans-octenyl)-thiazole (Ia, ~1 = H) was prepared in the way ~pecified in point i) of ~xample 1.
- Example 3 - Preparation of 2-methyl-4-(6-carbomethoxyhexyl)-5-(3-keto-1-trans-octen~ thiazole (Ia, ~1 = CH3) : 25 : a) 2-Neth~1-4-(6-carbomethoxyh~xyl)-thiazole-5-oarboxylic acid methylester (VIII, R1 ~ CH3~
8.4 g of 9Lcarbomethoxy-?-chloro-3-ketononanic acid ;methylester (VI) and 2.5 g of thioacet~mide (VII, R1 = CH3) ~ were boiled in 50 ml methanol for one hour, then methanol - 3o was evaporated in vacuum and the evaporation residue .
. .
dissolved in 75 ml of 2 N hydrochloric acid. m e obtained solution was neutralized with a 5 % solution of sodium carbo-nate and saturated with ammonium sulphate, then extracted with 3 x 75 ml of diethyl ether. After drying the ethereal extract on sodium sulphate, it was evaporated in vacuum, affording 8.2 g of a crude product containing 2-methyl-4-(6-carbomethoxyhexyl)-thiazole-5-carboxylic acid methylester (VIII, Rl = CH3) which could be used without any further purification for the preparation of 2-methyl-4-(6-carboxy-hexyl)-thiazole-5-carboxylic acid (IX, Rl = CH3) according to point b) of this Example.
On purifying the crude product by preparative thin layer chromatography with the use of a silicagel layer as adsorbent and a mixture of 60 % ethyl acetate and 40 %
n-heptane as running solvent, 2-methyl-4-(6-carbomethoxyhexyl)-thiazole-5-carboxylic acid methylester (VIII, Rl = CH3) of analytical purity was obtained.
IR spectrum (film): ~ CH 3000-2860,~ C=O 1735, 1720, ~ C-O 1270 cm~l.
NMR spectrum (CC14) : ~ OCH3 3.82 (3 H, s), 3.6 (3 H, s) ~ CH2 (vicinal to the ring) 3.05 (2 H, t, J = 7 Hz), ~ CH3 2,65 (3 H, s),~ CH2(C=O) 2.25 (2 H, t, J = Hz), CH2 1.95-1.15 (8 H, m) ppm.
b) 2-Methyl-4-(6-carboxyhexyl)-thiazole-5-carboxylic acid (IX, Rl = CH3) The solution of a 8 g of crude 2-methyl-4-(6-carbo-methoxyhexyl)-thiazole-5-carboxylic acid methylester (VIII, Rl = CH3) in 25 ml ethanol was treated with 40 ml of 2 N
sodium hydroxide solution. The reaction mixture was boiled ~ for 30 minutes, then acidified with 5 N sulphuric acid under ice-cooling. After extracting the aqueous reaction mixture with 3 x 75 ml of ethyl acetate, the extract was dried on sodium sulp}late and evaporated in vacuum. The obtained crude product was recrystallized from a mixture of acetone and n-hexane, affording 5.3 g of 2-methyl-4-(6-carboxyhexyl)-thia-zole-5-carboxylic acid (IX, Rl = CH3).
M.p. : 147-149 C.
IR spectrum (KBr) : ~ OH (carboxylic acid) 3300-2200, C=O 1685 cm~l.
NMR spectrum ~DC~ + DMSO-d6) : ~ COOH 9.0 (2 H), ~ CH2 (vicinal to the ring) 3.08 (2 H, t, J = 7 Hz), ~ CH3 2.65 (3 H, s), ~ CH2(C=O) 2.25 (2 H, t, J = 7 Hz), ~CH2 1.95-l.l (8 H, m) ppm.
c) 2-Methyl-4-(6-carbomethoxyhexyl)-thiazole-5-carboxylic acld (X, Rl ~ CH3) 5.15 g of 2-methyl-4-(6-carboxyhexyl)-thiazole-5-carboxylic acid (IX, Rl = CH3) and 5.4 g of p-toluenesulphonic acid monohydrate were dissolved in 200 ml of methanol. The reaction mixture was stirred for 2 hours at room temperature, then poured onto 500 ml of water. On saturating the aqueous solution with ammonium sulphate it was extracted with 3 x 200 ml of ethyl acetate, the ethyl acetate extract was washed with water, dried on sodium sulphate and evaporated in vacuum. Recrystallization of the obtained crude product from a mixture of diethyl ether and n-hexane afforded 4.3 g of 2-methyl-4-(6-carbomethoxyhexyl)-thiazole-5-carboxylic acid [X, Rl = CH3).
M.p.: 106-107 C.
IR spectrum (KBr) : ~ OH (carboxylic acid) 3200-2200, C=O 1735, 1695, ~ C-O 1235 cm~l .
NMR spectrum (CDC13) : ~ COOH 11.45 (1 H), ~ OCH3 3.65 (3 H, s),~ CH2 (vicinal to the ring) 3.2 ~2 H, t, J = 7.5 Hz), CH3, 2.75 (3 H, s), ~ CH2(C-O) 2.25 (2 H, t, J = 7.5 Hz), ~CH2 2.0-1.05 (8 H, m) ppm.
d) 2-Methyl-4(6-carbome~hoxyhexyl~5-hydroxymethyl-thiazole (XII, Rl = CH3 ) To the solution of 4.15 g of 2-methyl-4-(6-carbo-methoxyhexyl)-thiazole-5-carboxylic acid (X, Rl = CH3) in 50 ml of anhydrous benzene 4.2 ml of oxalyl chloride were added dropwise, and the reaction mixture was allowed to stand overnight at room temperature, then benzene and excess oxalyl chloride were distilled off in vacuum. The obtained residue which contained 2-methyl-4-(6-carbomethoxyhexyl)-thiazole-5-carboxylic chloride (XI, Rl = CH3) was dissolved in 20 ml ofanhydrous dioxane, and a suspension of 1.1 g of sodium boro-hydride in 20 ml of anhydrous dioxane was added dropwise to the solution under continuous stirring. Stirring of the reaction mixture was continued for 30 minutes at room temperature and for further 60 minutes at 80C. When the reaction mixture was cooled to room temperature, 25 ml of water were dropwise added under ice-cooling to the reaction mixture, and stirring was continued for 2 hours at room temperature. Subsequently, the aqueous reaction mixture was extracted with 3 x 50 ml of ethyl acetate. The ethyl acetate extract was dried over sodium sulphate and evaporated under vacuum, yielding 2.95 of crude product.
On purifying the crude product by preparative thin layer chromatography, using a silicagel layer as adsorbent and a mixture of 70 % ethyl acetate and 30% n-heptane as running solvent, 2-methyl-4-(6-carbomethoxyhexyl)-5-hydroxy-methyl-thiazole (XII, Rl = CH3 ) of analytical purity was obtained.
IR spectrum (film) : ~ OH 3300, ~ CH 30OO -2860, ~C=O
1735, bc-o 1255,b C-O (H) 1020 cm~l.
NMR spectrum (CC14) : ~ CH2 (OH) 4.62 (2 H, S),s OH 4-22 (1 H) ,~ OCH3 3.62 (3 H, s) ~ CH3 2.6 (3 H, s) ,S CH2 (vicinalto the ring) 2.59 (2 H, t, J = 7.5 HZ), ~ CH2 (C=0) 2.25 (2 H, t, J = 7 Hz), ~ CH2 1.95-1.1 (8 H, m) ppm.
e) 2-Methyl-4-(6-carbomethoxyhexyl)-thiazole-5-carbaldehyde (XIII, Rl = CH3) The solution of 2.8 g of crude 2-methyl-4-(6-carbo-methoxyhexyl)-5-hydroxymethyl thiazole (XII, Rl = CH3) in 25 ml of dichloromethane was dropwise added to the solution of 16 g chromium trioxide-dipyiridine complex in 320 ml of dichloromethane. Stirring of the reaction mixture was con-tinued for 30 minutes, then the reaction mixture was filtered and the filtrate was evaporated in vacuum. After purifying the crude product obtained as evaporation residue , by pre-parative thin layer chromatography using silicagel ~ayer as adsorbent and a mixture of 50% ethyl acetate and 50 % of n-heptane as running solvent, 2.15 g of 2-methyl-4-(6-carbo-methoxyhexyl)-thiazole-5-carbaldehyde (XIII, Rl = CH3) were obtained.
IR spectrum (film) : ~ CH 2995-2860, ~ C=0 1732, 1660, C-0 1255 cm 1.
NMR spectrum (CC14) : ~ CH0 10.0 (1 H, s),~ OCH3 3.61 (3 H, s),S CH2Cvicinal to the ring) 3.0 (2 H, t, J = 7.5 Hz), CH3 2.7 (3 H, s),~S CH2(C=0) 2.25 (2 H, t, J = 7 Hz).
~ CH2 1.95-1.1 (8 H, m) ppm.
Mass spectrum : molecular weight 269.
Mass number of characteristic ions (m/e) : 269, 240, 238, 196, 168, 154, 141, 113.
f) 2-Methyl-4-(6-carbomethoxyhexyl)-5-(3-keto-1-trans-cotenyl)-thiazole (Ia, Rl = CH3) 2 g of 2-methyl-4-(6-carbomethoxyhexyl)-thiazole-5-carbaldehyde (XIII, Rl = CH3) and 7 g of 2-oxoheptylidene-triphenyl phosphorane were dissolved in 15 ml of carbon tetrachloride. The reaction mixture was stirred for 16 hours under nitrogen current. During this time the 2-methyl-4-(6-carbomethoxyhexyl)-thiazole-5-carbaldehyde (XIII, Rl = CH3) was completely converted into 2-methyl-4-(6-carbomethoxyhexyl)-5-(3-keto-1-trans-octenyl)-thiazole (Ia, Rl = CH3). The latter compound was separated by preparative thin layer chroma-tography from the triphenyl phosphine oxide formed during the reaction and from the residual excess of 2-oxoheptylidene tri-phenyl phosphorane. For the separation a silicagel layer was used as adsorbent and a mixture of 50 % ethyl acetate and 50%
n-heptane as running solvent. In this way 2.1 g of 2-methyl-4-(6-carbomethoxyhexyl)-5-(3-keto-1-trans-oc-tenyl)-thiazole (Ia, Rl = CH3) were obtained.
IR spectrum (film) :1 CH 3000-2860, ~ C=O 1735, 1685-1660, C=C 1592,~ C-O 1250 cm~l.
NMR spectrum (CC14) : ~ CH=CH 7.52, 6.22 (2 H, q, J = 15.5 Hz), ~ OCH3 3.61 (3 H, s), ~ CH2 (vicinal to the ring) 2.78 (2 H, t, J = 6.5 Hz), ~ CH3 2.63 (3 H, s),~ CH2(C=O) 2.5 (2 H, t, J = 7 Hz), 2.25 (2 H, t, J = 7 Hz), ~ CH2 1.95-1.1 (14 H, m) ~ CH3 0.95 (3 H, t, J = 6 Hz) ppm.
Mass spectrum molecular weight 365.
Mass number of characteristic ions (m/e) : 365, 334, 309, 294, 292, 266, 250, 237, 236, 222, ~66, 152, 138.
Example 4 Preparation of 2-methyl-4-(6-carbomethoxyhexyl)-5-(3-keto-1-trans-octenyl)-thiazole (Ia, Rl = CH3) To a suspension of 0,45 g of sodium hydride in 5 ml of anhydrous 1,2-dimethoxy-ethane a solution of 4.12 g of 2-oxoheptylphosphonic acid dimethyl ester in 20 ml 1,2-dime-thoxy-ethane was added under stirring at room temperature.
The reaction mixture was stirred for an hour, then a solution of 1 g of 2-methyl-4-(6-carbomethoxyhexyl)-thiazole-5-carbal-dehyde (XIII, Rl = CH3) prepared according to point e) of Example 2, in 10 ml of dimethoxy-ethane was added dropwise, and stirring was continued for 5 hours. After dropwise, adding 30 ml of water under ice-cooling to the reaction mixture, it was extracted with 3 x 20 ml of diethyl ether. The extract was dried on sodium sulphate and evaporated in vacuum. The evaporation residue was purified by preparative thin layer chromatography, using a silicagel layer as adsorbent and a mixture of 40 % ethyl acetate and 60 % n-heptane as running solvent. The yield was 0.81 g of 2-methyl-4-(6-carbometho-xyhexyl)-5-(3-keto-1-trans-octenyl)-thiazole (Ia, Rl = CH3) of chromatographic purity.
Example 5 Preparation of 4-(6-carboxyhexyl)-5-(3-keto-1-trans-octenyl)-thiazole (Ib, Rl = H) .
- 31 _ To a ~uspension of 2.65 g of 4-(6-carbomethoxyhexyl)-5-(3-keto-1-trans-octenyl)-thiazole (I~, R1 H) in 50 ml of a 0.2 M phosphate buffer of pH 7.5, 265 mg of lipa~e enz~me of an activit~ of 40 U/mg, prepared with the fungus Rhizopus or~Tzae, 26 mg of the sodium salt of taurocholic acid, and 2.6 ml of a 10 Yo solution of gum arabic were added. ~he mixture was then shaken at 25 C in a screening shaker desk at 260 revolutions,'minute and an amplitude of 2 cm for 24 hours. ~hen the reaction mixture was diluted with 100 ml of water, acidified with citric acid and extracted with 3 x 75 ml of ethyl acetate. ~he ethyl acetate extract was dried on sodium sulphate and evaporated in vacuum. The obtained 2.95 g evaporation residue were purified by chrom~tography on a column prepared with lOO g of ~licic acid, eluting with mixtures of n-heptane and ethyl acetate whose ethyI acetate c~ntent wa~ stepwise increa~ed. 4-(6-Carboxyhexyl)-5-~3-keto-1-trans-octenyl)-thiazole ~Ib, R1 = H) was eluted from the co~umn b~ a mixture consisting of 60 ~ ethyl acetate and 40 ~ ~-heptane, `affording thus 1.8 g of a product of chromatographic purity which was recryætallized from acetone.
M~p,: 67-68 C.
IR pectrum (XBr): ~ OH (carboxylic acid) 3200-2300, ~ 7~H
3095, iJ C~ 3000-2860, ~ C=O 1713, 1690, ~JC=C 1590 cm 1~
2~ NMR spectrum (CDCl3): ~ COOH 10.9 (1 H), ~ ~y CH (thiazole) 8.8 (1H~ CH=CH 7.72, 6.52 (2 H, q, J = 15.5 Hz), - S CE2 (~icinal to the ring) 2.9 (2 H, t, J = 7 Ezj, ~CH2(C-0) 2.65 (2 E, t, J = 7 Hz), 2.32 (2 H, t, J = 7 Hz), S CH2 2.05-1~1 (14 H, m), S CH3 0.88 (3 E, t, J = 6 Hz) ppm.
3o Ma~s spectrum: molecular weight 337.
.
M~s number of ch~r~ct~rl~tie ions (m/e): 337, 281, 27B, 266, 238, 236~ 223, 20~ 152.
,Exsm~le 6 ~rQ~aratlon o~ 4-~6-c~r~ox~hexyl)-5-~3-koto-1-tr~n~-octen~ thl~ole tIb, R~ ~ H) 2 ml o~ 1 N ~o~lum hydroxl~o was tropw~se ~d~ed undor ~ltrogen atmosphere and under lce-coollng to a ~olution of 175 m6 Of 4-(6-carbomethox~hex~l)-5-(3-keto-1-tran~-octsnyl)-thiazole (Ia, R1 ~ ~) in 5 ml of ethanol. ~he solution was subsequently stirred for 1.5 hours at room temperature.
~hen the reaction mixture was poured onto 30 ml of ice-water, acidified with 1 N hydrochloric acid and extracted with 3 x 15 ml of ethyl acetate. ~he ethyl acetate extract was dried over sodium sulphate and evaporated under vacuum.
~he evaporatlon residue was purified by preparative thin layer chromatography, using a silicagel layer as adsorbent and the organic phase of a mixture of 110 ml of ethyl aoetate, 50 ml of n-hepta~e, 100 ml of water and 20 ml of acetic acid as running solvent. In this way 71 mg of 2Q 4~(6-carboxyhexyl~)-5-(3-keto-1-trans-octenyl)-thiazole (Ib, R1 ~ ~) f ohromatographic purity were obtained. The m.p. and spectroscopical data of the product agreed with those ~pecified in Example 5 ~xample 7 Preparation of 2-methyl-4-(6-carboxyhexyl)-5-(3-keto-~~ lttrans-octenyl)-thiazole (Ibj R1 = CH3) ~o a sugpension of 912 mg of 2-methyl-4-(6-carbo-methoxyhexyl)-5-(3-keto_1-trans-octenyl)-thiazole (Ia, R~ - CH3) in 20 ml of 0.2 M phosphate buffer of pE 7.5, 90 mg of the Iipase enzyme specified in Example 5, 9 mg ~053683 - ~3 -of the æo~ium æalt of t~urocholic acid and 0.9 ml of a 1 '~
~o]ution of gum ar~bic were added~ The mixture was then ~haken at 25 ~C in a æcreening æhaker de~k Qt 260 revolu-tio~min~te and an amplitude'of 2 cm for 24 hours. ~en ~he reaction mixture was diluted with 50 ml of water, acidified with citric acid and extracted with 3 x 40 ml of eth~71 acetate. ~he ethyl ~cetate extract was dried o~er æodium æulphate and evaporated under ~acuum. ~he obtained 1.03gevaporation residue were puri'fied ~y preparative thin layer chromatography in the way specified in Example 6. ~hu~', 645 mg of 2-methyl-4-(6-carboxyhexyl)-5-(3-keto-1-trans-octen~ thiazole (Ib, R1 = CH3) were obtained .
; IR spectrum (film): ~OH (carboxylic acid~ 3500-2400, ~ CH 2995-2860, ~ C=O 1720, 1680, Y C-C 1590 cm 1.
NMR spectrum (CCl4): ~ COOH 10.4 (1 E), S CH-CH 7.45,
6.18 (2 H~ ~, J - 15.5 Hz), ~ CH2 (vicinal to the ring) 2.75 (2 H, t, J- 7 Hz), ~ CH3 2.65 (3 H? 8)~ ~CE2(c=O) 2.45 (2 H, t, J ~ 7 Hz), 2.25 (2 H, t, J = 7 Ez), S CH2 ' ~0 1.95-1.1 (14 E, m), ~ CE3 0.9 (3 H, t, J = 5 Hz) ppm.
Ma8s spectrum: molecular weight 351.
Mas~ number of characteristic ions (m/e): 351, 295, 292, ` 280~ 252, 250, 237, 222, 166.
~xam~le 8 ' `'' ?5 Preparation of 4-(6-carbomethoxyhexyl)-5-(3-hydroxy-trans-octenyl)-thiazole (Ic, ~1 = H) - ~he solution of 143 mg of sodium borohydride in 30 ml of water was added to the æolution of 2.65 g of 4-(6-carbomethoxyhexyl)-5-(3-keto-1-trans-octen~l)-thiazole 3o (Ia, R1 = ~) in 30 ml of isopropanol. ~he obtained reaction ' ' ' ' , : - . :
mixture was stirred for 2 hours at room temperature, then poured onto 150 ml of water, and extracted with 3 x 75 ml of ethyl acetate. The ethyl acetate extract was washed with water until neutral and evaporated in vacuum. The obtained 2.5 g of residue on evaporation was subjected to chromatography on a column prepared with 100 g of silica, carrying out the elution with mixtures of n-heptane and ethyl acetate having stepwise increased content of ethyl acetate. The desired 4-(6-carbomethoxyhexyl)-5-(3-hydroxy-l-trans-octenyl)-thiazole (Ic, Rl = H) was eluted from the column with a mixture consisting of 70 % n-heptane and 30 %
ethyl acetate, affording 2.2 g of a product of chromatogra-phic purity.
IR spectrum (film) : ~ OH 3350, ~ ~ CH 3080, ~ CH 3000-2860, C=O 1735,~ C=C 1640, ~ C-O 1250 cm 1 .
NMR spectrum (CC14) : ~CH (thiazole) 8.5 (1 H, s), ~ CH=CH 6.67 (1 H, d, J = 16 Hz), 5.97 (1 H, dd, J = 16 Hz, J = 6 Hz),~ CH(OH)4.2 (1 H, m), ~ OCH3 3.6 (3 H, s), ~ OH 3.12 (1 H), ~ CH2 (vicinal to the ring) 2.75 ( 2 H, t, J = 7 Hz, ~ CH2 (C=O) 2.25 (2 H, t, J = 7 Hz), ~ CH2 1.95-1.1 (16 H, m), ~ CH3 0.9 (3 H, t, J = 5 Hz) ppm.
Mass spectrum : molecular weight 353.
Mass number of characteristic ions (m/e) : 353, 322, 282, 280, 254, 250, 238, 222~ 124.
Example 9 Preparation of 2-methyl-4-(6-carbomethoxyhexyl)-5-(3-hydroxy-1-trans-octenyl)-thiazole (Ic, Rl = CH3) The solution of 47 mg of sodium borohydride in 10 ml of water was added to the solution of 912 mg of 2-methyl-4-(6-carbomethoxyhexyl)-5-(3-keto-1-trans-octenyl)-thiazole (Ia, R1 = CH3) in 10 ml of isopropanol. The ob-tained reaction mixture was ~tirred for 2 hours ~t room temperature, then poured onto 50 ml water and extracted with 3 x 25 ml of ethyl acetate. ~he ethyl acetRte e~tract was washed with water until neutral, dried over sodium ~ulphate and evaporated under vacuum. The obtained 830 mg of residue on evaporation was purified by preparative thin layer chromatography, using a silicagel layer as adsorbent and a mixture of 50 ~ ethyl acetate and 50 X n-heptane as running solvent. Thus, 705 mg of 2-methyl-4-(6-carbo-methoxyhexyl)-5-(3-h;ydroxy-1-trans-octeng:l)-thiazole (Ic, R1 = CH3) of chromatographic purity were obtained.
IR spectrum (film~: ~ OH 3350, ~CH 3000-2860, ~ C=O 1740, ~ CaC 1640, ~ C-O 1255 cm 1.
NMR spectrum (CCl4): ~ CH~CH 6.48 (1 H, d, J ~ 15 Hz), 5.7 (1 H, dd, ~ ~ 15 Hz, J - 5.5 Hz), ~SC~(OH) 4.06 (1 H, m), ~ OCH3 3.56 (3H, 8)~ ~ OH 3.0 (1 H), ~ CH3 ~ ~CH2 (vicinal to the ring~ 2.55 (5 H), SCH2(C.O) 2.22 (2 H, t, J ~ 6~5 Hz), '~ S CH2 1.95-1.05 (16 H, m), SCH3 0.9 (3 ~, t, J - 5 Hz) ppm.
~ 20 Mas~ spe¢trum: molecular weight 367.
,~ ' 'Ma~ number of characteristic ions (m/e): 367, 336, 296, !~ 294~ 8, 264, ?52, 239, 236, 196, 183, 140.
Exam~le 10 ' Prèparation of 4-(6-oarboxyhexyl)-5-(3-hydroxy~
~25 trans-octenyl)-thiazole (Id, R1 Z H) ` ` To the suspensio~ of 1.75 g of 'l (6-carbomethoxyhexyl)-', 5-(3-hgdroxy-1-trans-octe~yl~-thiazole (Ic, R1 s H) in 35 ml of a 0.2 M ~hosphate buifer of p~ 7.5, 175 mg of the lipase en&yme ~pecified in Ex~mple 5, 17.5 mg of the aodiu~ salt of taurocholic acid o~d 1.75 ml of a 10 X solution of gum ' .~ ' , ' ' , . ' . , ' . . ' .
arabic were added. The mixture was then shaken at 25C in a screening shaker desk at 260 revolutions/mir,ute and an amplitude of 2 cm for 24 hours, whereafter the reaction mixture was diluted with 100 ml of water, acidified with citric acid and extracted with 3 x 70 ml of ethyl acetate.
The ethyl acetate extract was dried over sodium sulphate and evaporated under vacuum. The obtained 1.95 g of residue on evaporation was purified by chromatography on a column prepar-ed with 50 g of silicic acid, using as eluting agents mixtures of n-heptane and ethyl acetate whose ethyl acetate content was stepwise increased. 4-(6-Carbocyhexyl)-5-(3-hydroxy-1-trans-octenyl)-thiazole Id, R1 = H) was eluted from the column by a mixture consisting of 70 % ethyl acetate and 30 %
n-heptane. Thus, 1.25 g of a product of chromatographic purity was obtained which was recrystallized from a mixture of diethyl ether and n-hexane.
M.p. : 73-74C.
IR spectrum (film) : ~ OH 3500-2300, ~ CH 3000-2~60, ~ C=O 1710,~ C=C 1635 cm~l.
NMR spectrum (CDC13) : ~CH (thiazole) 8.55 (1 H s), OH 6.65 (2 H), ~ CH~CH 6.65 (1 H, d, J = 15 HZ), 5.9 ~1 H, dd, J = 15 HZ, J = 6 Hz), ~ CH(OH) 4.22 (1 H, m), ~ CH2 (vicinal to the ring) 2.75 (2 H, t, J = 6 Hz), 5 CH2(C=O) 2.28 (2 H, t, J = 6 Hz), ~ CH2 1.95-1.05 (16 H, m), ~ CH3 0,87 (3 H, t, J = 4 Hz) ppm.
Mass spectrum : molecular weight 339.
Mass number of characteristic ions (m/e) : 339, 321, 280, 268, 250, 240, 238, 225, 222, 182, 169, 152, 126, 124.
Example 11 Preparation of 2-methyl-4-(6-carboxyhexyl)-5-(3-hydro-xy-l-trans-octenyl)-thiazole (Id, Rl = CH3) The solution of 76 mg of sodium borohydride in 6 ml of water was added to the solution of 351 mg of 2-methyl-4-(6-carboxyhexyl)-5-(3-keto-1-trans-octenyl)-thiazole (Ib, Rl = CH3) in 4 ml of propanol. The reaction mixture was allowed to stand overnight at room temperature, then diluted with 50 ml of water, acidified with 1 N hydrochloric acid and extracted with 3 x 25 ml of ethyl acetate. The ethyl acetate extract was dried over sodium sulphate and evaporated under vacuum. m e obtained 317 mg of residue on evaporation was purified by preparative thin layer chromato-lQ graphy in the way specified in Example 6. Thus, 245 mg of 2-methyl-4-(6-carboxyhexyl)-5-(3-hydroxy-1-trans-octenyl)-thiazole (Id, Rl - CH3) were obtained.
IR speetrum (film) : OH 3500-2300, CH 3000-2860, C=O
1710, ~ C=C 1640 cm 1 NMR spectrum (CDC13) : ~ OH 7.15 (2 H), ~ CH=CH 6.55 (1 H, d, J = 15 Hz), 5.78 (1 H, dd, J = 15 Hz, J = 6 Hz), S CH(OH) 4.20 (1 H, m),~ CH3 + ~ CH2 (vieinal to the ring), 2.62 (5 H, m),~ CH2(C=O) 2.28 (2 H, t, J = 6 Hz), ~ CH2 1.9-1.05 (16 H, m), S CH3 0.9 (3 H, t, J = 5 Hz) ppm.
Mass speetrum : moleeular weight 353.
Mass number of eharaeteristic ions (m/e) : 353, 335, 294, 282, 264, 254, 252, 239, 236, 196, 183, 140.
Exam~Le 12 Preparation of 4-(6-carbomethoxyhexyl)-5-(3-aeetoxy--l-trans-oetenyl)-thiazole (Ie, Rl = H) To the solution of 353 mg of 4-(6-earbomethoxyhexyl)-5-(3-hydroxy-1-trans-oetenyl)-thiazole (Ie, Rl = H) in 4 ml of anhydrous pyridine, 1 ml of acetic anhydride was added.
The reaetion mixture was allowed to stand for 24 hours at room temperature, diluted with 50 ml of water and extraeted with 3 x 15 ml of ethyl aeetate. The ethyl aeetate extraet was washed with water, dried over sodium sulphate and .
, ~, , , , .. .. ,, .. , . . .: , . . .
evaporated under vacuum. The obtained 390 mg of residue on evaporation was purified by preparative thin layer chromato-graphy, using a silicagel layer as adsorbent and a mixture of 40 % ethyl acetate and 60 % n-heptane as running solvent.
Thus, 285 mg of 4-(6-carbomethoxyhexyl)-5-(3-acetoxy-1-trans-octenyl)-thiazole (Ie, Rl = H) of chromatographic purity were obtained.
IR spectrum (film) :~CH 3080, ~ CH 3000-2860, ~ C=O 1735, ~ C=C 1642, ~ C-O 1240 cm 1, NMR spectrum (CDC13) : ~ CH (thiazole) 8.46 (1 H, s), CH=CH 6.71 (1 H, d, J = 15 Hz), 5.76 (1 H, dd, J = 15 Hz, J = 6 Hz), S CH(OAc) 5.35 (1 H, m) ~ OCH3 3.6 (3 H, s), ~ CH2 (vicinal to the ring) 2.75 (2 H, t, J - 7 Hz), S CH2(C=O) 2.25 (2 H, t, J = 6 Hz), S CH3(C=O) 2.0 (3 H, s), ~ CH2 1.9-1.1 (16 H, m), 5 CH3 0.9 (3 H, t, J = S Hz) ppm.
Mass spectrum : molecular weight 395.
Mass number of characteristic ions (m/e) : 395, 353, 352, 336, 335, 324, 282,280, 267, 254, 250, 222.
Example 13 Preparation of 2-methyl-4-~6-carbomethoxyhexyl)-5-(3-acetoxy-1-trans-octenyl)-thiazole (Ie, Rl = CH3) To the solu~ion of 367 mg of 2-methyl-4-(6-carboxy-hexyl)-5-(3-hydroxy-1-trans-octenyl)thiazole (Ic, Rl = CH3) in 4 ml of anhydrous pyridine, 1 ml of acetic anhydride was added. The reaction mixture was allowed to stand for 24 hours at room temperature, diluted with 50 ml of water and extracted with 3 x 15 ml of ethyl acetate. The ethyl acetate extract was washed with water, dried over sodium sulphate and evaporated under vacuum. The obtained 403 mg of residue on evaporation was purified by preparative thin layer chromatography, using a silicagel layer as adsorbent and a mixture of 40 % ethyl acetate and 60 % n-heptane as running solvent. Thus, 290 mg of 2-methyl-4-(6-carbomethoxy-hexyl)-5-(3-acetoxy-1-trans-octenyl)-thiazole (Ie, Rl = CH3 of chromatographic purity were obtained.
IR spectrum (film) : ~ CH 3000-2860,~ C=O 1735, ~ C=C 1640, l~c_o 1240 cm~l.
NMR spectrum ~CDC13) : ~ CH=CH 6.55 (1 H, d, J = 15 Hz), 5.60 (1 H, dd, J = 15 Hz, J = 6 Hz), ~CH(OAc) 5.3 (1 H, m), ~ OCH3 3~6 (3 H, s), ~ CH2 (vicinaI to ~he ring) 2.65 (2 H, t, J = 7 H~), ~ CH3 2.6 (3 H, s) ~ CH2(C=O) 2.3 (2 H, t, J = 7 Hz), ~ CH3(C=O) 2.05 (3 H, s) ~ CH2 1.9-1.05 (16 H, m), ~ CH3 0.9 (3 H, t, J = 5 Hz) ppm.
Mass spectrum : molecular weight 409.
Mass number of characteristic ions (m/e) : 409, 378, 367, 366, 350, 349, 338, 336, 296, 294, 281, 268, 238, N~/cooR2 R1-~S~ ' Rg (I) QEACTION SCHE~ 1 C~cocH2cooR4~ metal Na R500C (cH2 ) (Il) (111) R~sOOC (CH2)6CO-CH-COOR~
CzO
(Iv) CH3 --~H300C(CH~)6CO-CH2-COOCH~, --(~) --C~OOC(CH~)~,GO-CHY-COOCH3+Rl-C~ NH
(\/1 ) (Vll) lOS3683 ~_~VwCOOcH3 N_~VWCOOH
R~ ~5~ sl COOCH3 COOH + R20H
(VIII) (IX) N~/\/COOR2 ~ CR2 ' --R1~S,~ s ~
COOH COCl (x) (XI) N~/\/COOR2 N~/\~COOR2 --R~s,~ Rl~S~
~HaOH CHO
(Xll) (Xlll) N~\/COOR2 --R1~ ¦¦
S~w O
(1~) RfACT/0~/ SC~ lE2 C~OR2 r~OH
5~ S
O O
(la) (Ib) R~f~.CTlON SCHE/~lE 3 COOR2 N~COOR2 R~S ; ~ R
OH
(la) ( Ic) I~EACTION SCHE~E 4 R~ R1~r~
S S~
0~
(Ib) (Id) ~2 "~}
. ~
: :
.
R~ l~/COOR2 y~ COOH
S~W S~W
OH OH
(Ic) (Id) R~ACTION SCHE11f 6 R1~ ~/GOOR N~COOR2 5~ ~ S~ ' ``
OH
(IC) ( le)
Ma8s spectrum: molecular weight 351.
Mas~ number of characteristic ions (m/e): 351, 295, 292, ` 280~ 252, 250, 237, 222, 166.
~xam~le 8 ' `'' ?5 Preparation of 4-(6-carbomethoxyhexyl)-5-(3-hydroxy-trans-octenyl)-thiazole (Ic, ~1 = H) - ~he solution of 143 mg of sodium borohydride in 30 ml of water was added to the æolution of 2.65 g of 4-(6-carbomethoxyhexyl)-5-(3-keto-1-trans-octen~l)-thiazole 3o (Ia, R1 = ~) in 30 ml of isopropanol. ~he obtained reaction ' ' ' ' , : - . :
mixture was stirred for 2 hours at room temperature, then poured onto 150 ml of water, and extracted with 3 x 75 ml of ethyl acetate. The ethyl acetate extract was washed with water until neutral and evaporated in vacuum. The obtained 2.5 g of residue on evaporation was subjected to chromatography on a column prepared with 100 g of silica, carrying out the elution with mixtures of n-heptane and ethyl acetate having stepwise increased content of ethyl acetate. The desired 4-(6-carbomethoxyhexyl)-5-(3-hydroxy-l-trans-octenyl)-thiazole (Ic, Rl = H) was eluted from the column with a mixture consisting of 70 % n-heptane and 30 %
ethyl acetate, affording 2.2 g of a product of chromatogra-phic purity.
IR spectrum (film) : ~ OH 3350, ~ ~ CH 3080, ~ CH 3000-2860, C=O 1735,~ C=C 1640, ~ C-O 1250 cm 1 .
NMR spectrum (CC14) : ~CH (thiazole) 8.5 (1 H, s), ~ CH=CH 6.67 (1 H, d, J = 16 Hz), 5.97 (1 H, dd, J = 16 Hz, J = 6 Hz),~ CH(OH)4.2 (1 H, m), ~ OCH3 3.6 (3 H, s), ~ OH 3.12 (1 H), ~ CH2 (vicinal to the ring) 2.75 ( 2 H, t, J = 7 Hz, ~ CH2 (C=O) 2.25 (2 H, t, J = 7 Hz), ~ CH2 1.95-1.1 (16 H, m), ~ CH3 0.9 (3 H, t, J = 5 Hz) ppm.
Mass spectrum : molecular weight 353.
Mass number of characteristic ions (m/e) : 353, 322, 282, 280, 254, 250, 238, 222~ 124.
Example 9 Preparation of 2-methyl-4-(6-carbomethoxyhexyl)-5-(3-hydroxy-1-trans-octenyl)-thiazole (Ic, Rl = CH3) The solution of 47 mg of sodium borohydride in 10 ml of water was added to the solution of 912 mg of 2-methyl-4-(6-carbomethoxyhexyl)-5-(3-keto-1-trans-octenyl)-thiazole (Ia, R1 = CH3) in 10 ml of isopropanol. The ob-tained reaction mixture was ~tirred for 2 hours ~t room temperature, then poured onto 50 ml water and extracted with 3 x 25 ml of ethyl acetate. ~he ethyl acetRte e~tract was washed with water until neutral, dried over sodium ~ulphate and evaporated under vacuum. The obtained 830 mg of residue on evaporation was purified by preparative thin layer chromatography, using a silicagel layer as adsorbent and a mixture of 50 ~ ethyl acetate and 50 X n-heptane as running solvent. Thus, 705 mg of 2-methyl-4-(6-carbo-methoxyhexyl)-5-(3-h;ydroxy-1-trans-octeng:l)-thiazole (Ic, R1 = CH3) of chromatographic purity were obtained.
IR spectrum (film~: ~ OH 3350, ~CH 3000-2860, ~ C=O 1740, ~ CaC 1640, ~ C-O 1255 cm 1.
NMR spectrum (CCl4): ~ CH~CH 6.48 (1 H, d, J ~ 15 Hz), 5.7 (1 H, dd, ~ ~ 15 Hz, J - 5.5 Hz), ~SC~(OH) 4.06 (1 H, m), ~ OCH3 3.56 (3H, 8)~ ~ OH 3.0 (1 H), ~ CH3 ~ ~CH2 (vicinal to the ring~ 2.55 (5 H), SCH2(C.O) 2.22 (2 H, t, J ~ 6~5 Hz), '~ S CH2 1.95-1.05 (16 H, m), SCH3 0.9 (3 ~, t, J - 5 Hz) ppm.
~ 20 Mas~ spe¢trum: molecular weight 367.
,~ ' 'Ma~ number of characteristic ions (m/e): 367, 336, 296, !~ 294~ 8, 264, ?52, 239, 236, 196, 183, 140.
Exam~le 10 ' Prèparation of 4-(6-oarboxyhexyl)-5-(3-hydroxy~
~25 trans-octenyl)-thiazole (Id, R1 Z H) ` ` To the suspensio~ of 1.75 g of 'l (6-carbomethoxyhexyl)-', 5-(3-hgdroxy-1-trans-octe~yl~-thiazole (Ic, R1 s H) in 35 ml of a 0.2 M ~hosphate buifer of p~ 7.5, 175 mg of the lipase en&yme ~pecified in Ex~mple 5, 17.5 mg of the aodiu~ salt of taurocholic acid o~d 1.75 ml of a 10 X solution of gum ' .~ ' , ' ' , . ' . , ' . . ' .
arabic were added. The mixture was then shaken at 25C in a screening shaker desk at 260 revolutions/mir,ute and an amplitude of 2 cm for 24 hours, whereafter the reaction mixture was diluted with 100 ml of water, acidified with citric acid and extracted with 3 x 70 ml of ethyl acetate.
The ethyl acetate extract was dried over sodium sulphate and evaporated under vacuum. The obtained 1.95 g of residue on evaporation was purified by chromatography on a column prepar-ed with 50 g of silicic acid, using as eluting agents mixtures of n-heptane and ethyl acetate whose ethyl acetate content was stepwise increased. 4-(6-Carbocyhexyl)-5-(3-hydroxy-1-trans-octenyl)-thiazole Id, R1 = H) was eluted from the column by a mixture consisting of 70 % ethyl acetate and 30 %
n-heptane. Thus, 1.25 g of a product of chromatographic purity was obtained which was recrystallized from a mixture of diethyl ether and n-hexane.
M.p. : 73-74C.
IR spectrum (film) : ~ OH 3500-2300, ~ CH 3000-2~60, ~ C=O 1710,~ C=C 1635 cm~l.
NMR spectrum (CDC13) : ~CH (thiazole) 8.55 (1 H s), OH 6.65 (2 H), ~ CH~CH 6.65 (1 H, d, J = 15 HZ), 5.9 ~1 H, dd, J = 15 HZ, J = 6 Hz), ~ CH(OH) 4.22 (1 H, m), ~ CH2 (vicinal to the ring) 2.75 (2 H, t, J = 6 Hz), 5 CH2(C=O) 2.28 (2 H, t, J = 6 Hz), ~ CH2 1.95-1.05 (16 H, m), ~ CH3 0,87 (3 H, t, J = 4 Hz) ppm.
Mass spectrum : molecular weight 339.
Mass number of characteristic ions (m/e) : 339, 321, 280, 268, 250, 240, 238, 225, 222, 182, 169, 152, 126, 124.
Example 11 Preparation of 2-methyl-4-(6-carboxyhexyl)-5-(3-hydro-xy-l-trans-octenyl)-thiazole (Id, Rl = CH3) The solution of 76 mg of sodium borohydride in 6 ml of water was added to the solution of 351 mg of 2-methyl-4-(6-carboxyhexyl)-5-(3-keto-1-trans-octenyl)-thiazole (Ib, Rl = CH3) in 4 ml of propanol. The reaction mixture was allowed to stand overnight at room temperature, then diluted with 50 ml of water, acidified with 1 N hydrochloric acid and extracted with 3 x 25 ml of ethyl acetate. The ethyl acetate extract was dried over sodium sulphate and evaporated under vacuum. m e obtained 317 mg of residue on evaporation was purified by preparative thin layer chromato-lQ graphy in the way specified in Example 6. Thus, 245 mg of 2-methyl-4-(6-carboxyhexyl)-5-(3-hydroxy-1-trans-octenyl)-thiazole (Id, Rl - CH3) were obtained.
IR speetrum (film) : OH 3500-2300, CH 3000-2860, C=O
1710, ~ C=C 1640 cm 1 NMR spectrum (CDC13) : ~ OH 7.15 (2 H), ~ CH=CH 6.55 (1 H, d, J = 15 Hz), 5.78 (1 H, dd, J = 15 Hz, J = 6 Hz), S CH(OH) 4.20 (1 H, m),~ CH3 + ~ CH2 (vieinal to the ring), 2.62 (5 H, m),~ CH2(C=O) 2.28 (2 H, t, J = 6 Hz), ~ CH2 1.9-1.05 (16 H, m), S CH3 0.9 (3 H, t, J = 5 Hz) ppm.
Mass speetrum : moleeular weight 353.
Mass number of eharaeteristic ions (m/e) : 353, 335, 294, 282, 264, 254, 252, 239, 236, 196, 183, 140.
Exam~Le 12 Preparation of 4-(6-carbomethoxyhexyl)-5-(3-aeetoxy--l-trans-oetenyl)-thiazole (Ie, Rl = H) To the solution of 353 mg of 4-(6-earbomethoxyhexyl)-5-(3-hydroxy-1-trans-oetenyl)-thiazole (Ie, Rl = H) in 4 ml of anhydrous pyridine, 1 ml of acetic anhydride was added.
The reaetion mixture was allowed to stand for 24 hours at room temperature, diluted with 50 ml of water and extraeted with 3 x 15 ml of ethyl aeetate. The ethyl aeetate extraet was washed with water, dried over sodium sulphate and .
, ~, , , , .. .. ,, .. , . . .: , . . .
evaporated under vacuum. The obtained 390 mg of residue on evaporation was purified by preparative thin layer chromato-graphy, using a silicagel layer as adsorbent and a mixture of 40 % ethyl acetate and 60 % n-heptane as running solvent.
Thus, 285 mg of 4-(6-carbomethoxyhexyl)-5-(3-acetoxy-1-trans-octenyl)-thiazole (Ie, Rl = H) of chromatographic purity were obtained.
IR spectrum (film) :~CH 3080, ~ CH 3000-2860, ~ C=O 1735, ~ C=C 1642, ~ C-O 1240 cm 1, NMR spectrum (CDC13) : ~ CH (thiazole) 8.46 (1 H, s), CH=CH 6.71 (1 H, d, J = 15 Hz), 5.76 (1 H, dd, J = 15 Hz, J = 6 Hz), S CH(OAc) 5.35 (1 H, m) ~ OCH3 3.6 (3 H, s), ~ CH2 (vicinal to the ring) 2.75 (2 H, t, J - 7 Hz), S CH2(C=O) 2.25 (2 H, t, J = 6 Hz), S CH3(C=O) 2.0 (3 H, s), ~ CH2 1.9-1.1 (16 H, m), 5 CH3 0.9 (3 H, t, J = S Hz) ppm.
Mass spectrum : molecular weight 395.
Mass number of characteristic ions (m/e) : 395, 353, 352, 336, 335, 324, 282,280, 267, 254, 250, 222.
Example 13 Preparation of 2-methyl-4-~6-carbomethoxyhexyl)-5-(3-acetoxy-1-trans-octenyl)-thiazole (Ie, Rl = CH3) To the solu~ion of 367 mg of 2-methyl-4-(6-carboxy-hexyl)-5-(3-hydroxy-1-trans-octenyl)thiazole (Ic, Rl = CH3) in 4 ml of anhydrous pyridine, 1 ml of acetic anhydride was added. The reaction mixture was allowed to stand for 24 hours at room temperature, diluted with 50 ml of water and extracted with 3 x 15 ml of ethyl acetate. The ethyl acetate extract was washed with water, dried over sodium sulphate and evaporated under vacuum. The obtained 403 mg of residue on evaporation was purified by preparative thin layer chromatography, using a silicagel layer as adsorbent and a mixture of 40 % ethyl acetate and 60 % n-heptane as running solvent. Thus, 290 mg of 2-methyl-4-(6-carbomethoxy-hexyl)-5-(3-acetoxy-1-trans-octenyl)-thiazole (Ie, Rl = CH3 of chromatographic purity were obtained.
IR spectrum (film) : ~ CH 3000-2860,~ C=O 1735, ~ C=C 1640, l~c_o 1240 cm~l.
NMR spectrum ~CDC13) : ~ CH=CH 6.55 (1 H, d, J = 15 Hz), 5.60 (1 H, dd, J = 15 Hz, J = 6 Hz), ~CH(OAc) 5.3 (1 H, m), ~ OCH3 3~6 (3 H, s), ~ CH2 (vicinaI to ~he ring) 2.65 (2 H, t, J = 7 H~), ~ CH3 2.6 (3 H, s) ~ CH2(C=O) 2.3 (2 H, t, J = 7 Hz), ~ CH3(C=O) 2.05 (3 H, s) ~ CH2 1.9-1.05 (16 H, m), ~ CH3 0.9 (3 H, t, J = 5 Hz) ppm.
Mass spectrum : molecular weight 409.
Mass number of characteristic ions (m/e) : 409, 378, 367, 366, 350, 349, 338, 336, 296, 294, 281, 268, 238, N~/cooR2 R1-~S~ ' Rg (I) QEACTION SCHE~ 1 C~cocH2cooR4~ metal Na R500C (cH2 ) (Il) (111) R~sOOC (CH2)6CO-CH-COOR~
CzO
(Iv) CH3 --~H300C(CH~)6CO-CH2-COOCH~, --(~) --C~OOC(CH~)~,GO-CHY-COOCH3+Rl-C~ NH
(\/1 ) (Vll) lOS3683 ~_~VwCOOcH3 N_~VWCOOH
R~ ~5~ sl COOCH3 COOH + R20H
(VIII) (IX) N~/\/COOR2 ~ CR2 ' --R1~S,~ s ~
COOH COCl (x) (XI) N~/\/COOR2 N~/\~COOR2 --R~s,~ Rl~S~
~HaOH CHO
(Xll) (Xlll) N~\/COOR2 --R1~ ¦¦
S~w O
(1~) RfACT/0~/ SC~ lE2 C~OR2 r~OH
5~ S
O O
(la) (Ib) R~f~.CTlON SCHE/~lE 3 COOR2 N~COOR2 R~S ; ~ R
OH
(la) ( Ic) I~EACTION SCHE~E 4 R~ R1~r~
S S~
0~
(Ib) (Id) ~2 "~}
. ~
: :
.
R~ l~/COOR2 y~ COOH
S~W S~W
OH OH
(Ic) (Id) R~ACTION SCHE11f 6 R1~ ~/GOOR N~COOR2 5~ ~ S~ ' ``
OH
(IC) ( le)
Claims (6)
1. A process for the production of thiazole derivatives of the general formula I
(I) wherein R1 and R2 stand for hydrogen atoms or alkyl groups, and R3 stands for an oxo, hydroxyl or acyloxy group, comprising the steps of a) acylating the sodium derivative of an acetoacetic acid alkylester of the formula CH3COCH2COOR4, wherein R4 denotes an alkyl group, with a 7-carbalkoxyheptanoyl chloride of the formula R5OOC(CH2)6COCl, wherein R5 denotes an alkyl group, and converting the obtained 10-carbalkoxy-2,4-diketodecane-3-carboxylic acid alkylester of the formula , wherein R4 and R5 have the same meanings as above, with sodium methylate into 9-carbomethoxy-3-ketononanic acid methylester of formula CH3OOC(CH2)6CO-CH2-COOCH3 , halogenating the latter compound to 9-carbomethoxy-2-halo-3-ketononanic acid methylester of the formula CH3OOC(CH2)6CO-CHY-COOCH3 , wherein Y denotes a halogen atom, reacting the last-named compound with a thioacid amide of the formula , wherein R1 denotes a hydrogen atom or an alkyl group, hydrolyzing the obtained 4-(6-carbo-methoxyhexyl)-thiazole-5-carboxylic acid methylester of the formula wherein R1 stands for a hydrogen atom or an alkyl group, to obtain 4-(6-carboxyhexyl)-thiazole-5-carboxylic acid of the formula wherein R1 is a hydrogen atom or an alkyl group, subjecting the last-named compound to selective esterification with an alcohol of the general formula R2OH, wherein R2 stands for an alkyl group, in the presence of p-toluenesulphonic acid, converting the thus-obtained 4-(6-carbalkoxyhexyl)-thiazole-5-carboxylic acid of the formula wherein R1 is a hydrogen atom or an alkyl group and R2 is an alkyl group, into 4-(6-carbalkoxyhexyl)-thiazole-5-carboxylic chloride of the general formula wherein R1 is a hydrogen atom or an alkyl group and R2 is an alkyl group, reducing the last-named compound with an alkali metal borohydride to 4-(6-carbalkoxyhexyl)-5-hydroxy-methyl-thiazole of the formula wherein R1 is a hydrogen atom or an alkyl group and R2 is an alkyl group, then oxidizing the last-named compound to 4-(6-carb-alkoxyhexyl)-thiazole-5-carbaldehyde of the formula wherein R1 is a hydrogen atom or an alkyl group and R2 is an alkyl group, reacting the last-named compound with 2-oxo-heptylidene-triphenyl phosphorane to obtain 4-(6-carbalkoxyhexyl)-5-(3-keto-1-trans-octenyl)- thiazole of the formula wherein R1 is a hydrogen atom or an alkyl group and R2 is an alkyl group, or, b) reducing 4-(6-carbalkoxyhexyl)-thiazole-5-carboxylic chloride of the formula wherein R1 stands for a hydrogen atom or an alkyl group and R2 stands for an alkyl group, with lithium tri-tert.-butoxy-aluminium hydride to 4-(6-carbalkoxyhexyl)-thiazole-5-carbaldehyde of the formula wherein R1 stands for a hydrogen atom or an alkyl group and R2 stands for an alkyl group, then reacting the last-named compound with 2-oxo-heptylidene-triphenyl phosphorane to obtain 4-(6-carb-alkoxyhexyl)-5-(3-keto-1- trans-octenyl)-thiazole of the formula wherein R1 is a hydrogen atom or an alkyl group and R2 is an alkyl group, or, c) reacting 4-(6-carbalkoxyhexyl)-thiazole-5-carbaldehyde of the formula wherein R1 is a hydrogen atom or an alkyl group and R2 is an alkyl group, with the sodium derivative of 2-oxo-heptyl-phosphonic acid dimethylester or with 2-oxo-haptylidene-triphenyl phosphorane into 4-(6-carbalkoxyhexyl)-5-(3-keto-1-trans-octenyl)-thiazole of the formula wherein R1 is a hydrogen atom or an alkyl group and R2 is an alkyl group, and, if desired, hydrolyzing the last-named compound to 4-(6-carboxyhexyl)-5-(3-keto-1-trans-octenyl)-thiazole of the formula wherein R1 is a hydrogen atom or an alkyl group, or, if desired, reducing 4-(6-carbalkoxyhexyl)-5-(3-keto-1-trans-octenyl)-thiazole of the above formula with an alkali metal borohydride to 4-(6-carbalkoxyhexyl)-5-(3-hydroxy-1-trans-octenyl)-thiazole of the formula wherein R1 is a hydrogen atom or an alkyl group and R2 is an alkyl group, or, if desired, reducing 4-(6-carboxyhexyl)-5-(3-keto-1-trans-octenyl)-thiazole with an alkali metal borohydride, or hydrolyzing 4-(6-carb-alkoxyhexyl)-5-(3-hydroxy-1-trans-octenyl)-thiazole of the above formula to 4-(6-carboxyhexyl)-5-(3-hydroxy-1-trans-octenyl)-thiazole of the formula wherein R1 stands for a hydrogen atom or an alkyl group, or acylating 4-(6-carbalkoxyhexyl)-5-(3-hydroxy-1-trans-octenyl)-thiazole of the above formula to 4-(6-carbalkoxyhexyl-5-(3-acyloxy-1-trans-octenyl)-thiazole of the formula wherein R1 stands for a hydrogen atom or an alkyl group and R2 stands for an alkyl group.
(I) wherein R1 and R2 stand for hydrogen atoms or alkyl groups, and R3 stands for an oxo, hydroxyl or acyloxy group, comprising the steps of a) acylating the sodium derivative of an acetoacetic acid alkylester of the formula CH3COCH2COOR4, wherein R4 denotes an alkyl group, with a 7-carbalkoxyheptanoyl chloride of the formula R5OOC(CH2)6COCl, wherein R5 denotes an alkyl group, and converting the obtained 10-carbalkoxy-2,4-diketodecane-3-carboxylic acid alkylester of the formula , wherein R4 and R5 have the same meanings as above, with sodium methylate into 9-carbomethoxy-3-ketononanic acid methylester of formula CH3OOC(CH2)6CO-CH2-COOCH3 , halogenating the latter compound to 9-carbomethoxy-2-halo-3-ketononanic acid methylester of the formula CH3OOC(CH2)6CO-CHY-COOCH3 , wherein Y denotes a halogen atom, reacting the last-named compound with a thioacid amide of the formula , wherein R1 denotes a hydrogen atom or an alkyl group, hydrolyzing the obtained 4-(6-carbo-methoxyhexyl)-thiazole-5-carboxylic acid methylester of the formula wherein R1 stands for a hydrogen atom or an alkyl group, to obtain 4-(6-carboxyhexyl)-thiazole-5-carboxylic acid of the formula wherein R1 is a hydrogen atom or an alkyl group, subjecting the last-named compound to selective esterification with an alcohol of the general formula R2OH, wherein R2 stands for an alkyl group, in the presence of p-toluenesulphonic acid, converting the thus-obtained 4-(6-carbalkoxyhexyl)-thiazole-5-carboxylic acid of the formula wherein R1 is a hydrogen atom or an alkyl group and R2 is an alkyl group, into 4-(6-carbalkoxyhexyl)-thiazole-5-carboxylic chloride of the general formula wherein R1 is a hydrogen atom or an alkyl group and R2 is an alkyl group, reducing the last-named compound with an alkali metal borohydride to 4-(6-carbalkoxyhexyl)-5-hydroxy-methyl-thiazole of the formula wherein R1 is a hydrogen atom or an alkyl group and R2 is an alkyl group, then oxidizing the last-named compound to 4-(6-carb-alkoxyhexyl)-thiazole-5-carbaldehyde of the formula wherein R1 is a hydrogen atom or an alkyl group and R2 is an alkyl group, reacting the last-named compound with 2-oxo-heptylidene-triphenyl phosphorane to obtain 4-(6-carbalkoxyhexyl)-5-(3-keto-1-trans-octenyl)- thiazole of the formula wherein R1 is a hydrogen atom or an alkyl group and R2 is an alkyl group, or, b) reducing 4-(6-carbalkoxyhexyl)-thiazole-5-carboxylic chloride of the formula wherein R1 stands for a hydrogen atom or an alkyl group and R2 stands for an alkyl group, with lithium tri-tert.-butoxy-aluminium hydride to 4-(6-carbalkoxyhexyl)-thiazole-5-carbaldehyde of the formula wherein R1 stands for a hydrogen atom or an alkyl group and R2 stands for an alkyl group, then reacting the last-named compound with 2-oxo-heptylidene-triphenyl phosphorane to obtain 4-(6-carb-alkoxyhexyl)-5-(3-keto-1- trans-octenyl)-thiazole of the formula wherein R1 is a hydrogen atom or an alkyl group and R2 is an alkyl group, or, c) reacting 4-(6-carbalkoxyhexyl)-thiazole-5-carbaldehyde of the formula wherein R1 is a hydrogen atom or an alkyl group and R2 is an alkyl group, with the sodium derivative of 2-oxo-heptyl-phosphonic acid dimethylester or with 2-oxo-haptylidene-triphenyl phosphorane into 4-(6-carbalkoxyhexyl)-5-(3-keto-1-trans-octenyl)-thiazole of the formula wherein R1 is a hydrogen atom or an alkyl group and R2 is an alkyl group, and, if desired, hydrolyzing the last-named compound to 4-(6-carboxyhexyl)-5-(3-keto-1-trans-octenyl)-thiazole of the formula wherein R1 is a hydrogen atom or an alkyl group, or, if desired, reducing 4-(6-carbalkoxyhexyl)-5-(3-keto-1-trans-octenyl)-thiazole of the above formula with an alkali metal borohydride to 4-(6-carbalkoxyhexyl)-5-(3-hydroxy-1-trans-octenyl)-thiazole of the formula wherein R1 is a hydrogen atom or an alkyl group and R2 is an alkyl group, or, if desired, reducing 4-(6-carboxyhexyl)-5-(3-keto-1-trans-octenyl)-thiazole with an alkali metal borohydride, or hydrolyzing 4-(6-carb-alkoxyhexyl)-5-(3-hydroxy-1-trans-octenyl)-thiazole of the above formula to 4-(6-carboxyhexyl)-5-(3-hydroxy-1-trans-octenyl)-thiazole of the formula wherein R1 stands for a hydrogen atom or an alkyl group, or acylating 4-(6-carbalkoxyhexyl)-5-(3-hydroxy-1-trans-octenyl)-thiazole of the above formula to 4-(6-carbalkoxyhexyl-5-(3-acyloxy-1-trans-octenyl)-thiazole of the formula wherein R1 stands for a hydrogen atom or an alkyl group and R2 stands for an alkyl group.
2. A process as claimed in claim 1 , characterized by carrying out the chlorination of 9-carbomethoxy-3-ketononanic acid methylester with sulphuryl chloride.
3. A process as claimed in claim 1, characterized by carrying out the hydrolysis of 4-(6-carbomethoxyhexyl)-thiazole-5-carboxylic acid methylester of the formula wherein R1 is a hydrogen atom or an alkyl group, with an alkali hydroxide.
4. A process as claimed in claim 1, characterized by carrying out the oxidation of 4-(6-carbalkoxyhexyl)-5-hydroxymethylthiazole of the formula wherein R1 is a hydrogen atom or an alkyl group and R2 is an alkyl group, with a chromium trioxide-dipyridine complex.
5. A process as claimed in claim 1, characterized by carrying out the hydrolysis of the ester group of the compounds of the formula and respectively, wherein R1 is a hydrogen atom or an alkyl group and R2 is an alkyl group, with an esterase enzyme.
6. New thiazole derivatives of the general formula I
(I) wherein R1 and R2 stand for hydrogen atoms or alkyl groups, and R3 stands for an oxo, hydroxyl or acyloxy group, whenever obtained by a process according to claim 1 or its obvious chemical equivalents.
(I) wherein R1 and R2 stand for hydrogen atoms or alkyl groups, and R3 stands for an oxo, hydroxyl or acyloxy group, whenever obtained by a process according to claim 1 or its obvious chemical equivalents.
Applications Claiming Priority (1)
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HUGO1269A HU169072B (en) | 1974-05-14 | 1974-05-14 |
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AT (1) | AT351525B (en) |
BE (1) | BE828994A (en) |
CA (1) | CA1053683A (en) |
CH (1) | CH613959A5 (en) |
DD (1) | DD117462A1 (en) |
DE (1) | DE2521517A1 (en) |
DK (1) | DK144065C (en) |
FR (1) | FR2270872B1 (en) |
GB (1) | GB1480975A (en) |
HU (1) | HU169072B (en) |
NL (1) | NL7505585A (en) |
PL (1) | PL107592B1 (en) |
SE (1) | SE421918B (en) |
SU (1) | SU755197A3 (en) |
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US4022794A (en) * | 1976-05-24 | 1977-05-10 | Merck & Co., Inc. | Novel analogs of prostaglandins with 4-oxo-thiazolidinyl nucleus and method of preparation thereof |
DE2946810A1 (en) * | 1979-11-20 | 1981-05-27 | A. Nattermann & Cie GmbH, 5000 Köln | ALKENYL-THIENYL-ALKANIC CARBONIC ACID AND ITS DERIVATIVES, METHOD FOR THE PRODUCTION THEREOF AND THE MEDICINAL PRODUCTS CONTAINING THE SAME |
-
1974
- 1974-05-14 HU HUGO1269A patent/HU169072B/hu unknown
-
1975
- 1975-05-12 CH CH603275A patent/CH613959A5/en not_active IP Right Cessation
- 1975-05-12 FR FR7514625A patent/FR2270872B1/fr not_active Expired
- 1975-05-13 GB GB20147/75A patent/GB1480975A/en not_active Expired
- 1975-05-13 AT AT366775A patent/AT351525B/en not_active IP Right Cessation
- 1975-05-13 BE BE156281A patent/BE828994A/en unknown
- 1975-05-13 NL NL7505585A patent/NL7505585A/en not_active Application Discontinuation
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- 1975-05-13 DK DK210175A patent/DK144065C/en active
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- 1975-05-14 CA CA226,932A patent/CA1053683A/en not_active Expired
- 1975-05-14 PL PL1975180338A patent/PL107592B1/en unknown
- 1975-05-14 DD DD186029A patent/DD117462A1/xx unknown
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Also Published As
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SE421918B (en) | 1982-02-08 |
JPS5163171A (en) | 1976-06-01 |
SU755197A3 (en) | 1980-08-07 |
DE2521517A1 (en) | 1975-11-27 |
GB1480975A (en) | 1977-07-27 |
DK144065C (en) | 1982-05-17 |
BE828994A (en) | 1975-09-01 |
DK210175A (en) | 1975-11-15 |
AU8113575A (en) | 1976-11-18 |
DK144065B (en) | 1981-11-30 |
FR2270872B1 (en) | 1978-10-06 |
HU169072B (en) | 1976-09-28 |
CH613959A5 (en) | 1979-10-31 |
DD117462A1 (en) | 1976-01-12 |
PL107592B1 (en) | 1980-02-29 |
AT351525B (en) | 1979-07-25 |
NL7505585A (en) | 1975-11-18 |
FR2270872A1 (en) | 1975-12-12 |
ATA366775A (en) | 1979-01-15 |
SE7505494L (en) | 1975-11-17 |
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