DE1812099C3 - Metalated isocyanides - Google Patents
Metalated isocyanidesInfo
- Publication number
- DE1812099C3 DE1812099C3 DE19681812099 DE1812099A DE1812099C3 DE 1812099 C3 DE1812099 C3 DE 1812099C3 DE 19681812099 DE19681812099 DE 19681812099 DE 1812099 A DE1812099 A DE 1812099A DE 1812099 C3 DE1812099 C3 DE 1812099C3
- Authority
- DE
- Germany
- Prior art keywords
- isocyanides
- metalated
- sodium
- isocyanide
- compounds
- 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
- 150000002527 isonitriles Chemical class 0.000 title claims description 11
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 22
- MZRVEZGGRBJDDB-UHFFFAOYSA-N N-Butyllithium Chemical compound [Li]CCCC MZRVEZGGRBJDDB-UHFFFAOYSA-N 0.000 claims description 12
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 11
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 11
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 claims description 8
- -1 alcoholates Chemical class 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 7
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 6
- 238000006263 metalation reaction Methods 0.000 claims description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 5
- 229910052739 hydrogen Inorganic materials 0.000 claims description 4
- 239000001257 hydrogen Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- KEAYESYHFKHZAL-UHFFFAOYSA-N Sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 239000011541 reaction mixture Substances 0.000 claims description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 2
- 150000001336 alkenes Chemical class 0.000 claims description 2
- LPNYRYFBWFDTMA-UHFFFAOYSA-N potassium tert-butoxide Chemical compound [K+].CC(C)(C)[O-] LPNYRYFBWFDTMA-UHFFFAOYSA-N 0.000 claims description 2
- 229910000104 sodium hydride Inorganic materials 0.000 claims description 2
- 239000012312 sodium hydride Substances 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims 8
- 150000001875 compounds Chemical class 0.000 claims 5
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims 4
- 239000007788 liquid Substances 0.000 claims 4
- 238000001465 metallisation Methods 0.000 claims 4
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 claims 3
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims 3
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims 3
- 239000003513 alkali Substances 0.000 claims 3
- 229910052783 alkali metal Inorganic materials 0.000 claims 3
- 150000001340 alkali metals Chemical class 0.000 claims 3
- 229910052799 carbon Inorganic materials 0.000 claims 3
- 235000019441 ethanol Nutrition 0.000 claims 3
- 238000000034 method Methods 0.000 claims 3
- 238000002360 preparation method Methods 0.000 claims 3
- WQDUMFSSJAZKTM-UHFFFAOYSA-N Sodium methoxide Chemical compound [Na+].[O-]C WQDUMFSSJAZKTM-UHFFFAOYSA-N 0.000 claims 2
- CIUQDSCDWFSTQR-UHFFFAOYSA-N [C]1=CC=CC=C1 Chemical compound [C]1=CC=CC=C1 CIUQDSCDWFSTQR-UHFFFAOYSA-N 0.000 claims 2
- 125000003545 alkoxy group Chemical group 0.000 claims 2
- 150000001408 amides Chemical class 0.000 claims 2
- 125000004432 carbon atom Chemical group C* 0.000 claims 2
- 125000004663 dialkyl amino group Chemical group 0.000 claims 2
- 150000002430 hydrocarbons Chemical group 0.000 claims 2
- 239000012442 inert solvent Substances 0.000 claims 2
- 229910052751 metal Inorganic materials 0.000 claims 2
- 239000002184 metal Substances 0.000 claims 2
- 150000000476 acetylides Chemical class 0.000 claims 1
- 150000001298 alcohols Chemical class 0.000 claims 1
- 125000001931 aliphatic group Chemical group 0.000 claims 1
- 150000001413 amino acids Chemical class 0.000 claims 1
- 125000003118 aryl group Chemical group 0.000 claims 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims 1
- 239000003153 chemical reaction reagent Substances 0.000 claims 1
- 238000001704 evaporation Methods 0.000 claims 1
- 125000000623 heterocyclic group Chemical group 0.000 claims 1
- 150000004678 hydrides Chemical class 0.000 claims 1
- 229930195733 hydrocarbon Natural products 0.000 claims 1
- 150000004679 hydroxides Chemical class 0.000 claims 1
- 239000000543 intermediate Substances 0.000 claims 1
- 239000012948 isocyanate Substances 0.000 claims 1
- 150000002513 isocyanates Chemical class 0.000 claims 1
- 239000007791 liquid phase Substances 0.000 claims 1
- LZWQNOHZMQIFBX-UHFFFAOYSA-N lithium;2-methylpropan-2-olate Chemical compound [Li+].CC(C)(C)[O-] LZWQNOHZMQIFBX-UHFFFAOYSA-N 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- SFDZETWZUCDYMD-UHFFFAOYSA-N monosodium acetylide Chemical compound [Na+].[C-]#C SFDZETWZUCDYMD-UHFFFAOYSA-N 0.000 claims 1
- 239000012299 nitrogen atmosphere Substances 0.000 claims 1
- 239000001301 oxygen Substances 0.000 claims 1
- 229910052760 oxygen Inorganic materials 0.000 claims 1
- 239000003208 petroleum Substances 0.000 claims 1
- NHKJPPKXDNZFBJ-UHFFFAOYSA-N phenyllithium Chemical compound [Li]C1=CC=CC=C1 NHKJPPKXDNZFBJ-UHFFFAOYSA-N 0.000 claims 1
- 239000002244 precipitate Substances 0.000 claims 1
- ODZPKZBBUMBTMG-UHFFFAOYSA-N sodium amide Chemical compound [NH2-].[Na+] ODZPKZBBUMBTMG-UHFFFAOYSA-N 0.000 claims 1
- QDRKDTQENPPHOJ-UHFFFAOYSA-N sodium ethoxide Chemical compound [Na+].CC[O-] QDRKDTQENPPHOJ-UHFFFAOYSA-N 0.000 claims 1
- KSMWLICLECSXMI-UHFFFAOYSA-N sodium;benzene Chemical compound [Na+].C1=CC=[C-]C=C1 KSMWLICLECSXMI-UHFFFAOYSA-N 0.000 claims 1
- 239000007858 starting material Substances 0.000 claims 1
- 238000003786 synthesis reaction Methods 0.000 claims 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 10
- OFBQJSOFQDEBGM-UHFFFAOYSA-N Pentane Chemical compound CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 8
- HUMNYLRZRPPJDN-UHFFFAOYSA-N benzaldehyde Chemical compound O=CC1=CC=CC=C1 HUMNYLRZRPPJDN-UHFFFAOYSA-N 0.000 description 8
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- KWOLFJPFCHCOCG-UHFFFAOYSA-N Acetophenone Chemical compound CC(=O)C1=CC=CC=C1 KWOLFJPFCHCOCG-UHFFFAOYSA-N 0.000 description 4
- QNGNSVIICDLXHT-UHFFFAOYSA-N para-ethylbenzaldehyde Natural products CCC1=CC=C(C=O)C=C1 QNGNSVIICDLXHT-UHFFFAOYSA-N 0.000 description 4
- RIWNFZUWWRVGEU-UHFFFAOYSA-N isocyanomethylbenzene Chemical compound [C-]#[N+]CC1=CC=CC=C1 RIWNFZUWWRVGEU-UHFFFAOYSA-N 0.000 description 3
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 3
- IMSODMZESSGVBE-UHFFFAOYSA-N 2-Oxazoline Chemical compound C1CN=CO1 IMSODMZESSGVBE-UHFFFAOYSA-N 0.000 description 2
- YZCKVEUIGOORGS-OUBTZVSYSA-N Deuterium Chemical compound [2H] YZCKVEUIGOORGS-OUBTZVSYSA-N 0.000 description 2
- XLYOFNOQVPJJNP-ZSJDYOACSA-N Heavy water Chemical compound [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 2
- 150000001728 carbonyl compounds Chemical class 0.000 description 2
- 229910052805 deuterium Inorganic materials 0.000 description 2
- ZRKSVHFXTRFQFL-UHFFFAOYSA-N isocyanomethane Chemical compound C[N+]#[C-] ZRKSVHFXTRFQFL-UHFFFAOYSA-N 0.000 description 2
- KJPRLNWUNMBNBZ-QPJJXVBHSA-N (E)-cinnamaldehyde Chemical compound O=C\C=C\C1=CC=CC=C1 KJPRLNWUNMBNBZ-QPJJXVBHSA-N 0.000 description 1
- KIIBETRYVBIAOO-UHFFFAOYSA-N 1,2-diphenylethylbenzene Chemical compound C=1C=CC=CC=1CC(C=1C=CC=CC=1)C1=CC=CC=C1 KIIBETRYVBIAOO-UHFFFAOYSA-N 0.000 description 1
- 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 1
- 238000005481 NMR spectroscopy Methods 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- AELUEZCISKPTEP-UHFFFAOYSA-N [Li]C[N+]#[C-] Chemical compound [Li]C[N+]#[C-] AELUEZCISKPTEP-UHFFFAOYSA-N 0.000 description 1
- RWCCWEUUXYIKHB-UHFFFAOYSA-N benzophenone Chemical compound C=1C=CC=CC=1C(=O)C1=CC=CC=C1 RWCCWEUUXYIKHB-UHFFFAOYSA-N 0.000 description 1
- 239000012965 benzophenone Substances 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- XZKRXPZXQLARHH-UHFFFAOYSA-N buta-1,3-dienylbenzene Chemical compound C=CC=CC1=CC=CC=C1 XZKRXPZXQLARHH-UHFFFAOYSA-N 0.000 description 1
- 229940117916 cinnamic aldehyde Drugs 0.000 description 1
- KJPRLNWUNMBNBZ-UHFFFAOYSA-N cinnamic aldehyde Natural products O=CC=CC1=CC=CC=C1 KJPRLNWUNMBNBZ-UHFFFAOYSA-N 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- WRJBSKQYDASILN-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1.O=C1CCCCC1 WRJBSKQYDASILN-UHFFFAOYSA-N 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- FPULFENIJDPZBX-UHFFFAOYSA-N ethyl 2-isocyanoacetate Chemical compound CCOC(=O)C[N+]#[C-] FPULFENIJDPZBX-UHFFFAOYSA-N 0.000 description 1
- 125000004494 ethyl ester group Chemical group 0.000 description 1
- WUDNUHPRLBTKOJ-UHFFFAOYSA-N ethyl isocyanate Chemical compound CCN=C=O WUDNUHPRLBTKOJ-UHFFFAOYSA-N 0.000 description 1
- DLEDOFVPSDKWEF-UHFFFAOYSA-N lithium butane Chemical compound [Li+].CCC[CH2-] DLEDOFVPSDKWEF-UHFFFAOYSA-N 0.000 description 1
- 238000004949 mass spectrometry Methods 0.000 description 1
- 239000012074 organic phase Substances 0.000 description 1
- 150000002918 oxazolines Chemical class 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- IQSYKHVFMYGJER-UHFFFAOYSA-N tert-butyl 2-isocyanoacetate Chemical compound CC(C)(C)OC(=O)C[N+]#[C-] IQSYKHVFMYGJER-UHFFFAOYSA-N 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F1/00—Compounds containing elements of Groups 1 or 11 of the Periodic Table
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F3/00—Compounds containing elements of Groups 2 or 12 of the Periodic Table
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F3/00—Compounds containing elements of Groups 2 or 12 of the Periodic Table
- C07F3/02—Magnesium compounds
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F3/00—Compounds containing elements of Groups 2 or 12 of the Periodic Table
- C07F3/06—Zinc compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Pyridine Compounds (AREA)
Description
Zu 900 ml trockenem Tetrahydrofuran fügt man bei - 70°C unter Stickstoff, 0,30 Mol n-Butyllithium (198 ml, 1,25-N Lösung in Hexan) und tropft anschließend 12,3 g (0,30 Mol) Methylisocyanid zu. Das Isocyanmethyllithium scheidet sich hierbei in Form farbloser Kristalle ab. Zum Nachweis fügt man Zimtaldehyd hinzu, wobei 5-Styryl-/l2-oxazolin und Phenylbutadien entstehen.0.30 mol of n-butyllithium (198 ml, 1.25 N solution in hexane) is added to 900 ml of dry tetrahydrofuran at -70 ° C. under nitrogen, and 12.3 g (0.30 mol) of methyl isocyanide are then added dropwise . The isocyanomethyl lithium separates out in the form of colorless crystals. Cinnamaldehyde is added to detect this, resulting in 5-styryl- / l 2 -oxazoline and phenylbutadiene.
Eine Lösung von 5OmMoI n-Butyllithium in 45 ml Pentan wird mit 150 ml trockenem Tetrahydrofuran verdünnt. Hierzu tropft man bei - 70° C unter Stickstoff 5,85 g (50 mMol) Benzylisocyanid, das «-Lithio-benzyl-A solution of 5OmMoI n-butyllithium in 45 ml of pentane is mixed with 150 ml of dry tetrahydrofuran diluted. To this, 5.85 g (50 mmol) of benzyl isocyanide, the "-lithio-benzyl-" are added dropwise at -70 ° C. under nitrogen
isonitril gibt sich durch eine intensive Rotfärbung zu erkennen. Die Metallierung läßt sich weiter nachweisen durch Zugabe von Benzophenon, wobei man 1-Lithiumoxy-2-isocyan-l,1,2-triphenyIäthan bzw. dessen Folgeprodukte erhältisonitrile can be recognized by an intense red color. The metalation can be further demonstrated by adding benzophenone, 1-lithiumoxy-2-isocyan-l, 1,2-triphenylethane or its derivatives
Auf 2,9 g (25 mMol) Benzylisonitril, gelöst in 10 ml perdeuteriertem Dimethylsulfoxid, läßt man 2,8 g (25 mMol) Kalium-tert.-butanolat bei Raumtemperatur 10 min einwirken. Dabei bildet sich «-Kaliumbenzylisocyanid, das unter diesen Bedingungen Deuterolyse erleidet. Man isoliert 2,75 g (95%) reines at^x-Dideuterobenzylisocyanid. On 2.9 g (25 mmol) of benzyl isonitrile, dissolved in 10 ml perdeuterated dimethyl sulfoxide, 2.8 g (25 mmol) potassium tert-butoxide at room temperature Work for 10 minutes. "-Potassium benzyl isocyanide is formed, which undergoes deuterolysis under these conditions. 2.75 g (95%) of pure at ^ x -dideuterobenzyl isocyanide are isolated.
Zu 5,64 g (40 mMol) Isocyanessigsäure-tert.-butylester in 40 ml trockenem Tetrahydrofuran tropft man bei -600C unter Stickstoff 40 mMol n-Butyllithium (17 ml, 2,35-N Lösung in Pentan). Die Bildung des a-Lithio-isocyanessigsäure-tert.-butylesters erkennt man an der auftretenden Gelbfärbung. Sie läßt sich mit Acetophenon nachweisen, wobei 2-Lithiumoxy-l-isocyan-2-phenyl-propan-l -carbonsäure-tert-butylester bzw. dessen Folgeprodukte entsteht.To 5.64 g (40 mmol) of tert-butyl isocyanoacetate in 40 ml of dry tetrahydrofuran is added dropwise at -60 0 C under nitrogen, 40 mmol of n-butyllithium (17 mL, 2.35 N solution in pentane). The formation of the tert-butyl α-lithio-isocyanoacetate can be recognized by the yellow coloration that occurs. It can be detected with acetophenone, with tert-butyl 2-lithiumoxy-1-isocyan-2-phenyl-propane-1-carboxylate or its derivatives.
Zu einer Lösung von 0,6 g Natrium in 50 ml Äthanol tropft man bei Raumtemperatur ein Gemisch von 2,825 g (25 mMol) Isocyanessigsäureäthylester und 2,65 g (25 mMol) Benzaldehyd. Der intermediär gebildete a-Natrium-isocyanessigsäureäthylester ergibt mit dem anwesenden Benzaldehyd 2-Natriumoxy-l-isocyan-2-phenyl-äthan-l-carbonsäureäthylester bzw. dessen Folgeprodukt.A mixture of is added dropwise at room temperature to a solution of 0.6 g of sodium in 50 ml of ethanol 2.825 g (25 mmol) of ethyl isocyanoacetate and 2.65 g (25 mmol) of benzaldehyde. The intermediate formed a-sodium-isocyanessigsäureäthylester gives with the benzaldehyde present, 2-sodiumoxy-l-isocyan-2-phenyl-ethane-l-carboxylic acid ethyl ester or its derivative.
B e i s ρ i e 1 e 6 bis 8B e i s ρ i e 1 e 6 to 8
Anstelle einer Isolierung des metallierten Isocyanids kann der Nachweis der Metallierung durch unmittelbare weitere Umsetzung mit einer Carbonylverbindung zu Oxazolinen oder zu Olefinen erbracht werden.Instead of isolating the metalated isocyanide, the metalation can be detected by direct further reaction with a carbonyl compound to give oxazolines or olefins.
Zu 66 ml n-ButyIlithi:im (0,1 Mol) in 100 ml absolutem Tetrahydrofuran tropft man bei — 700C unter Stickstoff die Lösung von 5,6 ml Methylisocyanid (0,1 Mol) in 20 ml absolutem Tetrahydrofuran. Nach 10 Minuten gibt man bei der gleichen Temperatur die Lösung von 12,0 g (0,1 Mol) Acetophenon in 20 ml absolutem Tetrahydrofuran und nach weiteren 10 Minuten 25 ml Methanol zu. Man rührt zwei Stunden bei Raumtemperatur, zieht das Lösungsmittel unter vermindertem Druck ab und verteilt den Rückstand zwischen Äther und Wasser. Die Destillation der ätherischen Lösung liefert 12,8 g 5-Methyl-o-phenyl-2-oxazolin, Kp. 70°C/0,l mm. Ausbeute 80%.Ml to 66 n-ButyIlithi: in (0.1 mol) in 100 ml of absolute tetrahydrofuran is added dropwise at - 70 0 C under nitrogen, the solution of 5.6 ml of methyl isocyanide (0.1 mol) in 20 ml of absolute tetrahydrofuran. After 10 minutes, the solution of 12.0 g (0.1 mol) of acetophenone in 20 ml of absolute tetrahydrofuran and, after a further 10 minutes, 25 ml of methanol are added at the same temperature. The mixture is stirred for two hours at room temperature, the solvent is stripped off under reduced pressure and the residue is partitioned between ether and water. Distillation of the ethereal solution yields 12.8 g of 5-methyl-o-phenyl-2-oxazoline, boiling point 70 ° C./0.1 mm. Yield 80%.
Isocyanic!Isocyanic!
Carbonylverbindung 2-OxazoIin AusbeuteCarbonyl compound 2-oxazoline yield
Benzyl-Benzyldryl- Benzyl-benzyldryl-
Cyclohexanon
CyclohexanonCyclohexanone
Cyclohexanone
Der Nachweis der Entstehung von metalliertem Isocyanid ist auch durch Deuterierung möglich.The formation of metalated isocyanide can also be detected by means of deuteration.
Zur Lösung von 6,5 g (50 mMol) «-Phenyl-äthylisocyanid in 50 ml absolutem Tetrahydrofuran tropft man bei -700C unter Stickstoff 44 ml Phenyllithäum (55 mMol). Die Metallierung wird durch die Grünfärbung der Lösung angezeigt. Nach 10 Minuten setzt man beiTo solution of 6.5 g (50 mmol) of "-phenyl-äthylisocyanid in 50 ml of absolute tetrahydrofuran is added dropwise at -70 0 C under nitrogen 44 ml Phenyllithäum (55 mmol). The metalation is indicated by the green color of the solution. After 10 minutes you sit down
Cyclohexanspiro-5'-(4'-phenyl)- 26 %Cyclohexanspiro-5 '- (4'-phenyl) - 26%
Cyclohexanspiro-5'-(4',4'-i!iphenyl)- 72 %Cyclohexanspiro-5 '- (4', 4'-i! Iphenyl) - 72%
der gleichen Temperatur die Lösung von 2 ml Deuteriumoxid in 10 ml Tetrahydrofuran zu, wobei sich die Mischung wieder entfärbt. Man hydrolysiert mit konz. Kochsalzlösung, trennt die organische Phase ab, trocknet und destilliert. Man erhält 5,8 g «-Deutero-Λ-phenyl-äthylisocyanid, Ausbeute 89%. Der Deuteriumgehalt wurde NMR- und massenspektrometrisch bestimmt (95%). Die Position des Deuteriums ergibt sich eindeutig aus dem NM R-Spektrum.the solution of 2 ml of deuterium oxide in 10 ml of tetrahydrofuran to the same temperature, whereby the mixture is decolorized again. It is hydrolyzed with conc. Saline solution, separates the organic phase, dries and distilled. 5.8 g «-Deutero-Λ-phenyl-ethyl isocyanide are obtained, Yield 89%. The deuterium content was determined by NMR and mass spectrometry (95%). The position of the deuterium results clearly from the NM R spectrum.
IsocyanidIsocyanide
Base Reakt. temp. ProduktBase react. temp. product
3-Dimethylamino-propyl-3-Methoxy-propyl- 3-dimethylamino-propyl-3-methoxy-propyl-
Zur Lösung von 4,52 g (0,04 Mol) Isocyan-essigsäureäthylester in 20 ml Tetrahydrofuran, 5 ml n-Pentan und 5 ml Äther tropft man unter kräftigem Rühren in ca. 30 Minuten 0,04 Mol Butyllithium (als ca. 2,5 η-Lösung in Pentan), wobei man die Temperatur unter — 700C hältTo a solution of 4.52 g (0.04 mol) of ethyl isocyanate in 20 ml of tetrahydrofuran, 5 ml of n-pentane and 5 ml of ether, 0.04 mol of butyllithium (as approx. 2 , 5 η solution in pentane), the temperature being kept below -70 ° C
und dafür sorgt, daß die Tropfen direkt in das Reaktionsgemisch fallen. Ausbeute an Lithium-isocyanessigsäure-äthylester ca. 74% (bestimmt durch Umsetzung mit Benzaldehyd).and ensures that the drops fall directly into the reaction mixture. Yield of ethyl lithium isocyanoacetate approx. 74% (determined by reaction with benzaldehyde).
1313th
Beispiel Natrium-isocyan-essigsäure-ä thy (esterExample sodium isocyanate acetic acid ethy (ester
Zur Suspension von 0,96 g (0,04 Mol) Natriumhydrid (15 entwickelt. Ausbeute an Natrium-isocyan-essigsäure-Developed for the suspension of 0.96 g (0.04 mol) of sodium hydride (15. Yield of sodium isocyanate-acetic acid
in 50 ml Tetrahydrofuran tropft man bei Raumtempera- äthylester 69% (bestimmt durch Umsetzung mit50 ml of tetrahydrofuran are added dropwise at room temperature ethyl ester 69% (determined by reaction with
tür unter kräftigem Rühren die 4,52 g (0,04 Mol) Benzaldehyd). Isocyanessigsäiireäthylester, wobei sich Wasserstoffdoor with vigorous stirring the 4.52 g (0.04 mol) benzaldehyde). Isocyanessigsäiireäthylester, whereby hydrogen
Claims (1)
Es gibt verschiedene Möglichkeiten, den Ablauf der Metallierung zu erkennen oder zu verfolgen. In manchen Fällen können Farbänderungen beobachtet werden. In anderen Fällen bilden sich die metallierten Isocyanide in Form von Niederschlägen im Reaktionsansatz. Gelegentlich kann die Vollständigkeit einer Metallierung durch den negativen Gilman-Test ermittelt werden. Auch die Deuterierung kann zum Nachweis der Bildung eines metallierten Isocyanids benutzt werden. Die metallierten Isocyanide können unmittelbar im Reaktionsansatz ihrer Herstellung für weitere Umsetzungen benutzt werden; man kann sie aber auch durch Verdampfen der flüssigen Phase isolieren.In the reaction, preference is given to stoichiometric amounts of isocyanate and metalating agent, but the completeness of the reaction can in many cases be promoted by an excess of metalating agent.
There are various ways of recognizing or tracking the process of metallization. In some cases, color changes can be observed. In other cases, the metalated isocyanides are formed in the form of precipitates in the reaction mixture. Occasionally, the completeness of a metalation can be determined by the negative Gilman test. Deuteration can also be used to detect the formation of a metalated isocyanide. The metalated isocyanides can be used directly in the reaction mixture for their preparation for further reactions; but you can also isolate them by evaporating the liquid phase.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19681812099 DE1812099C3 (en) | 1968-12-02 | 1968-12-02 | Metalated isocyanides |
GB1935169A GB1254184A (en) | 1968-12-02 | 1969-04-16 | Metallized isocyanides |
FR6935673A FR2024976A1 (en) | 1968-12-02 | 1969-10-17 | Synthesis of delta-2-oxazolines from carbonyl - compounds and alpha metallated isonitriles |
US00304240A US3840530A (en) | 1968-12-02 | 1972-11-06 | Metallized isocyanides and their reactions |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19681812099 DE1812099C3 (en) | 1968-12-02 | 1968-12-02 | Metalated isocyanides |
Publications (3)
Publication Number | Publication Date |
---|---|
DE1812099A1 DE1812099A1 (en) | 1970-06-11 |
DE1812099B2 DE1812099B2 (en) | 1977-09-29 |
DE1812099C3 true DE1812099C3 (en) | 1978-05-18 |
Family
ID=5714915
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19681812099 Expired DE1812099C3 (en) | 1968-12-02 | 1968-12-02 | Metalated isocyanides |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE1812099C3 (en) |
GB (1) | GB1254184A (en) |
-
1968
- 1968-12-02 DE DE19681812099 patent/DE1812099C3/en not_active Expired
-
1969
- 1969-04-16 GB GB1935169A patent/GB1254184A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE1812099B2 (en) | 1977-09-29 |
GB1254184A (en) | 1971-11-17 |
DE1812099A1 (en) | 1970-06-11 |
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