DK171934B1 - Benzyl ether derivatives - Google Patents

Benzyl ether derivatives Download PDF

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DK171934B1
DK171934B1 DK128892A DK128892A DK171934B1 DK 171934 B1 DK171934 B1 DK 171934B1 DK 128892 A DK128892 A DK 128892A DK 128892 A DK128892 A DK 128892A DK 171934 B1 DK171934 B1 DK 171934B1
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carbon atoms
alkyl group
methyl
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phenyl
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DK128892D0 (en
DK128892A (en
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Takafumi Shida
Hideo Arabori
Takeo Watenabe
Yoshikazu Kubota
Isao Ichinose
Yoichi Kanda
Shiro Yamazaki
Hiroyasu Shinkawa
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Kureha Chemical Ind Co Ltd
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Description

i DK 171934 B1and DK 171934 B1

Den foreliggende opfindelse angår nitro- og aminosubstituere-de benzyletherderivater med formlen XThe present invention relates to nitro- and amino-substituted benzyl ether derivatives of the formula X.

ZZ

Λ som er mellemprodukter til fremstillingen af 1,5- diphenyl-1H-1,2,4-triazol-3-carboxamidderivater, som er nyttige som en 5 aktiv bestanddel i herbicider.Λ which are intermediates for the preparation of 1,5-diphenyl-1H-1,2,4-triazole-3-carboxamide derivatives which are useful as an active ingredient in herbicides.

Ris, hvede og majs er vigtige landbrugsprodukter, og anvendelse af herbicider er væsentlig for beskyttelse af disse afgrøder fra skadelig indvirkning af ukrudtsarter, således at der opnås et forøget udbytte.Rice, wheat and maize are important agricultural products and the use of herbicides is essential for the protection of these crops from the harmful effects of weeds, so that an increased yield is obtained.

10 Det er kendt, at derivaterne af 1,5-diphenyl-lH-l,2,4-tri-azol-3-carboxamid har en herbicid aktivitet. F.eks. beskrives der i japansk patentansøgning Kokai (offentliggjort) nr. 193406/82 et herbicidt middel indeholdende som dets aktive bestanddel et derivat af 1,2,4-triazol, som er repræsenteret 15 ved formlen: R3 hvor er et hydrogenatom, et fluoratom, et chloratom, et iodatom, en lavere alkylgruppe med 1 til 3 carbonatomer, en alkylgruppe substitueret med fluor, en nitrogruppe eller en methoxygruppe, R2 er et hydrogenatom, et chloratom eller en 20 methylgruppe, og R3 er et hydrogenatom eller en methylgruppe.It is known that the derivatives of 1,5-diphenyl-1H-1,2,4-tri-azole-3-carboxamide have a herbicidal activity. For example. Japanese Patent Application Kokai (Published) No. 193406/82 discloses a herbicidal composition containing as its active ingredient a derivative of 1,2,4-triazole, which is represented by the formula: R 3 wherein is a hydrogen atom, a fluorine atom, a chlorine atom, an iodine atom, a lower alkyl group having 1 to 3 carbon atoms, an alkyl group substituted with fluorine, a nitro group or a methoxy group, R 2 is a hydrogen atom, a chlorine atom or a methyl group, and R 3 is a hydrogen atom or a methyl group.

DK 171934 B1 2DK 171934 B1 2

Der er også i japansk patentansøgning Kokai (offentliggjort) nr. 98004/84 beskrevet et herbicidt middel indeholdende et derivat af l,2,4-triazol, som er repræsenteret ved formlen (I) : nr-*« R> j85 R3 r2 5 hvor R-l og R2 uafhængigt af hinanden betegner et hydrogenatom, et halogenatom, en alkylgruppe eller en halogenalkyl-gruppe, R3 er et hydrogenatom, et halogenatom eller en alkylgruppe og R4 er en cyano-, carbamoyl-, thiocarbamoyl-, N-al-kylcarbamoyl-, N-halogenalkylcarbamoyl-, N-methoxyalkylcarba-10 moyl-, N-alkenyl-carbamoyl-, N-halogenalkenylcarbamoyl-, N-acylcarbamoyl-, N-halogenacylcarbamoyl- eller N-methylthio-carbamoylcarbamoyl-gruppe.Japanese Patent Application Kokai (Published) No. 98004/84 also discloses a herbicidal composition containing a derivative of 1,2,4-triazole, which is represented by the formula (I): no- * «R> j85 R3 r2 5 wherein R 1 and R 2 independently represent a hydrogen atom, a halogen atom, an alkyl group or a haloalkyl group, R 3 is a hydrogen atom, a halogen atom or an alkyl group and R 4 is a cyano, carbamoyl, thiocarbamoyl, N-alkylcarbamoyl , N-haloalkylcarbamoyl, N-methoxyalkylcarbamoyl, N-alkenylcarbamoyl, N-haloalkenylcarbamoyl, N-acylcarbamoyl, N-haloacylcarbamoyl or N-methylthiocarbamoylcarbamoyl group.

Disse derivater er imidlertid stadig utilfredsstillende med hensyn til herbicid aktivitet og selektivitet. Derfor har det 15 i høj grad været ønskeligt at udvikle forbindelser, som har høj herbicid aktivitet og fremragende selektivitet, hvilket gør det muligt udelukkende at bekæmpe ukrudtsarter uden at påføre afgrøderne, såsom ris, hvede, majs osv., nogen skade.However, these derivatives are still unsatisfactory in terms of herbicidal activity and selectivity. Therefore, it has been highly desirable to develop compounds which have high herbicidal activity and excellent selectivity, which makes it possible to control weeds only without inflicting any damage on the crops, such as rice, wheat, maize, etc.

Det har nu vist sig, at visse derivater af 1,5-diphenyl-1H-20 1,2,4-triazol-3-carboxamid har fremragende selektiv herbicid aktivitet mod græsukrudtsarter og især bredbladede ukrudtsarter, medens de ikke beskadiger sådanne afgrøder som ris, hvede og majs. Disse herbicidt aktive forbindelser kan fremstilles under anvendelse af, som mellemprodukter, hidtil ukendte 25 benzyletherderivater.It has now been found that certain derivatives of 1,5-diphenyl-1H-20 1,2,4-triazole-3-carboxamide have excellent selective herbicidal activity against grass weeds and especially broadleaf weeds, while not damaging such crops as rice. , wheat and corn. These herbicidally active compounds can be prepared using, as intermediates, novel benzyl ether derivatives.

Den foreliggende opfindelse angår derfor et benzyletherderi-vat med formlen AThe present invention therefore relates to a benzyl ether derivative of the formula A.

DK 171934 Bl 3 z x1—ώ xh2or X2 hvori R er en ikke-substitueret, ligekædet alkylgruppe med 4 til 10 carbonatomer, en ikke-substitueret, forgrenet alkylgruppe med 4 til 10 carbonatomer, en alkylgruppe med 1 til 3 5 carbonatomer, som er substitueret med en alicyklisk struktur med 3 til 7 carbonatomer, en phenylgruppe eller en aralkyl-gruppe med 7 til 9 carbonatomer, X1 er halogen eller en alkylgruppe med 1 til 3 carbonatomer; X2 er hydrogen, halogen eller en alkylgruppe med 1 til 3 carbonatomer; og Z er NH2 10 eller N02 med den forudsætning, at (i) når X1 er en ethylgruppe i 4- eller 6-stillingen og X2 er hydrogen, er R ikke en phenylgruppe, og (ii) når en af X1 og X2 er en 2-methylgruppe og den anden er en 6-methylgruppe, er R ikke en ligekædet eller forgrenet C4- 15 Cg-alkylgruppe, en phenylgruppe eller en benzylgruppe.Wherein R is an unsubstituted, straight-chain alkyl group having 4 to 10 carbon atoms, an unsubstituted, branched alkyl group having 4 to 10 carbon atoms, an alkyl group having 1 to 3 carbon atoms which is substituted with an alicyclic structure having 3 to 7 carbon atoms, a phenyl group or an aralkyl group having 7 to 9 carbon atoms, X 1 is halogen or an alkyl group having 1 to 3 carbon atoms; X 2 is hydrogen, halogen or an alkyl group having 1 to 3 carbon atoms; and Z is NH 2 10 or NO 2 with the proviso that (i) when X 1 is an ethyl group in the 4- or 6-position and X 2 is hydrogen, R is not a phenyl group, and (ii) when one of X 1 and X 2 is a 2-methyl group and the other is a 6-methyl group, R is not a straight or branched C 4 -C 6 alkyl group, a phenyl group or a benzyl group.

I en anden udførelsesform angår opfindelsen et benzyletherde-rivat med formlen A': x1—fol (A'} X2 hvori R er en ligekædet alkylgruppe med 2 til 10 carbonato-20 mer, som er substitueret med 3 til 19 fluoratomer, eller en forgrenet alkylgruppe med 3 til 10 carbonatomer, som er substitueret med 3 til 19 fluoratomer; X1 er halogen eller en alkylgruppe med 1 til 3 carbonatomer; og X2 er hydrogen, halogen eller en alkylgruppe med 1 til 3 carbonatomer; og Z er 4 DK 171934 B1 NH2 eller N02.In another embodiment, the invention relates to a benzyl ether derivative of the formula A ': x1-fol (A'} X2 wherein R is a straight chain alkyl group having 2 to 10 carbon atoms, which is substituted by 3 to 19 fluorine atoms, or a branched alkyl group having 3 to 10 carbon atoms which is substituted by 3 to 19 fluorine atoms; X1 is halogen or an alkyl group having 1 to 3 carbon atoms and X2 is hydrogen, halogen or an alkyl group having 1 to 3 carbon atoms and Z is 4 DK 171934 B1 NH2 or NO2.

Eksempler på en foretrukket forbindelse med formlen A' er 3-(2,2,3,3,3-pentafluorpropoxy)methyl-4-methyl-1-nitrobenzen.Examples of a preferred compound of formula A 'are 3- (2,2,3,3,3-pentafluoropropoxy) methyl-4-methyl-1-nitrobenzene.

Forbindelser med formlen A anvendes som mellemprodukter til 5 fremstillingen af 1,5-diphenyl-IH-1,2,4-triazol-3-carboxamid-derivater med formlen (I): 0Compounds of formula A are used as intermediates for the preparation of 1,5-diphenyl-1H-1,2,4-triazole-3-carboxamide derivatives of formula (I):

IIII

N-π—CNH2 >s » χ/ X2 hvori R, X1 og X2 er som defineret ovenfor; Y1 er hydrogen eller fluor; og Y2 er hydrogen eller fluor.N-π — CNH2> s »χ / X2 wherein R, X1 and X2 are as defined above; Y 1 is hydrogen or fluorine; and Y 2 is hydrogen or fluorine.

Forbindelser med formlen A, hvori Z er NO2, kan fremstilles 10 ved en fremgangsmåde, som omfatter omsætning af en forbindelse med den almene formel (III): N02 x1—O <m> xr hvori X1 og X2 er som defineret ovenfor, med en alkohol ROH, hvori R er som defineret ovenfor, i nærværelse af en hydro-genchloridacceptor ved en temperatur på fra -10°C til 150°C.Compounds of formula A wherein Z is NO 2 can be prepared by a process which comprises reacting a compound of general formula (III): NO 2 x 1 -O <m> xr wherein X 1 and X 2 are as defined above, with a alcohol ROH, wherein R is as defined above, in the presence of a hydrogen chloride acceptor at a temperature of from -10 ° C to 150 ° C.

15 Forbindelser med formlen A, hvori Z er NH2, kan fremstilles ved en fremgangsmåde, som omfatter reduktion af en forbindel- 5 DK 171934 B1 se med formlen A, hvori Z er N02-Compounds of formula A wherein Z is NH 2 can be prepared by a process which comprises reducing a compound of formula A wherein Z is NO 2

Forbindelserne med formlen (I) kan fremstilles ved hjælp af en fremgangsmåde ifølge det følgende reaktionsskema 1.The compounds of formula (I) may be prepared by a method according to the following Reaction Scheme 1.

Reaktionsskema 1 —^CH2OR conh Y W- ch2or X1 X2 (II) (I) 5 hvor R, X1, X2, Y1 og Y2 er som ovenfor defineret.Reaction Scheme 1 - CH2OR conh Y W- ch2or X1 X2 (II) (I) 5 wherein R, X1, X2, Y1 and Y2 are as defined above.

Et derivat af 2-phenyl-4-(phenylhydrazono)-2-oxazolin-5-on, som er repræsenteret ved formlen (II), omsættes med ammoniak i et organisk opløsningsmiddel, såsom acetone eller toluen, ved en temperatur fra -10 til 150°C i 0,1 til 20 timer. Den 10 opnåede reaktionsblanding syrnes til pH-værdi 1-3 med saltsyre, eddikesyre eller lignende og omrøres derefter ved 0 til 150°C i 0,1 til 20 timer for at fremkalde dehydratiserings-cyklisering. Forbindelserne med formlen (I) opnås i et højt udbytte ved fremgangsmåden.A derivative of 2-phenyl-4- (phenylhydrazono) -2-oxazolin-5-one, represented by formula (II), is reacted with ammonia in an organic solvent such as acetone or toluene at a temperature of from -10 to 150 ° C for 0.1 to 20 hours. The reaction mixture obtained is acidified to pH 1-3 with hydrochloric acid, acetic acid or the like and then stirred at 0 to 150 ° C for 0.1 to 20 hours to induce dehydration cyclization. The compounds of formula (I) are obtained in a high yield by the process.

15 Forbindelsen med formlen (II) kan syntetiseres, f.eks. ved hjælp af en fremgangsmåde ifølge det følgende reaktionsskema 2, hvori mellemprodukterne (IV) og (V) er forbindelser med formlen A.The compound of formula (II) may be synthesized, e.g. by a process according to the following Reaction Scheme 2, wherein the intermediates (IV) and (V) are compounds of formula A.

6 DK 171934 B16 DK 171934 B1

Reaktionsskema 2 NH, i ^°2 1Reaction Scheme 2 NH 4

_ R0L> X ^ ^CHOR_ R0L> X ^ ^ CHOR

X2^CH2C1 x2>^CH2OR x2 (III) UV) !V) +X2 ^ CH2C1 x2> ^ CH2OR x2 (III) UV)! V) +

NaNC^/HCl ^ C1 — Ά c, o, i (vn ^W^°Ao χ1 v Y1 N-i r <H> N£-\ __5. v2 O* CONHCH2COOH X—Rpl Y2 (VII) (VIII) hvor R, X1, X2, Y1 og Y2 er som ovenfor defineret.NaNC ^ / HCl ^ C1 - Ά c, o, i (vn ^ W ^ ° Ao χ1 v Y1 Ni r <H> N £ - \ __5. V2 O * CONHCH2COOH X — Rpl Y2 (VII) (VIII) where R , X1, X2, Y1 and Y2 are as defined above.

Et derivat af chlormethylnitrobenzen (III) foretres ved f.eks. at omsætte det med ROH i dimethylformamid eller hexa-5 methylphosphoramid i nærværelse af en hydrogenchloridaccep-tor, såsom KOH eller NaH, ved en temperatur fra -10 til 150°C, fortrinsvis fra 0 til 80°C, i 0,1 til 20 timer, fortrinsvis 0,5 til 10 timer, for at syntetisere nitrobenzyl-etherderivatet (IV) . Denne forbindelse ifølge opfindelsen 10 reduceres derefter ved hjælp af en konventionel fremgangsmåde, f.eks. ved dertil at sætte hydrazinhydrat i en alkoholopløsning deraf og opvarme blandingen under tilbagesvaling i nærværelse af palladiumtrækul i 1 til 10 timer for at opnå anilinderivatet (V) ifølge opfindelsen. Andre reduktionsfrem-15 gangsmåder er også anvendelige her, såsom en fremgangsmåde, hvor nitrobenzyletherderivatet (IV) reduceres ved anvendelse af jern, zink eller tin i et opløsningsmiddel, såsom saltsyre 7 DK 171934 B1 eller eddikesyre, en fremgangsmåde, hvor derivatet (IV) reduceres ved anvendelse af kolloidt svovl eller natriumsulfid i ethanol eller vandholdigt ethanol, en fremgangsmåde hvor derivatet (IV) reduceres ved indvirkningen af hydrazin i etha-5 nol i nærværelse af ferrisalt og aktivt carbon og en fremgangsmåde, hvor derivatet (IV) katalytisk reduceres ved hjælp af hydrogengas ved almindeligt tryk til 5 atmosfære i et opløsningsmiddel, såsom ethanol eller eddikesyre, i nærværelse af en katalysator, såsom Raneynikkel, palladiumcarbon eller 10 platinoxid.A derivative of chloromethylnitrobenzene (III) is preferred by e.g. reacting it with ROH in dimethylformamide or hexamethylphosphoramide in the presence of a hydrogen chloride acceptor, such as KOH or NaH, at a temperature from -10 to 150 ° C, preferably from 0 to 80 ° C, in 0.1 to 20 ° C. hours, preferably 0.5 to 10 hours, to synthesize the nitrobenzyl ether derivative (IV). This compound of the invention 10 is then reduced by a conventional method, e.g. by adding thereto hydrazine hydrate in an alcoholic solution thereof and heating the mixture under reflux in the presence of palladium charcoal for 1 to 10 hours to obtain the aniline derivative (V) according to the invention. Other reduction methods are also useful here, such as a process in which the nitrobenzyl ether derivative (IV) is reduced by using iron, zinc or tin in a solvent such as hydrochloric acid or acetic acid, a process in which the derivative (IV) is reduced using colloidal sulfur or sodium sulphide in ethanol or aqueous ethanol, a process in which the derivative (IV) is reduced by the action of hydrazine in ethanol in the presence of ferrisalt and activated carbon and a process in which the derivative (IV) is catalytically reduced by of hydrogen gas at ordinary pressure to 5 atmospheres in a solvent such as ethanol or acetic acid in the presence of a catalyst such as Raney nickel, palladium carbon or platinum oxide.

Derefter omdannes anilinderivatet (V) til et diazoniumsalt (VI) ved f.eks. at anvende natriumnitrit i saltsyre ved en temperatur fra -10 til 15°C.The aniline derivative (V) is then converted to a diazonium salt (VI) by e.g. to use sodium nitrite in hydrochloric acid at a temperature from -10 to 15 ° C.

Separat syntetiseres et derivat af 2-phenyl-2-oxazolin-5-on 15 (VII) ved at underkaste et derivat af hippursyre (VIII) dehy-dratiseringscyklisering i eddikesyreanhydrid ved en temperatur fra 20 til 100°C, fortrinsvis 50 til 90°C, i 0,1 til 30 timer, fortrinsvis 0,1 til 3 timer. Derefter omsættes diazo-niumsaltet (VI) med derivatet af 2-phenyl-2-oxazolin-5-on 20 (VII) ved en temperatur fra -50 til 100°C, fortrinsvis -30 til 40°C, i 0,01 til 20 timer, fortrinsvis 0,1 til 10 timer, til opnåelse af forbindelsen, som er repræsenteret ved formlen (II) .Separately, a derivative of 2-phenyl-2-oxazolin-5-one (VII) is synthesized by subjecting a derivative of hippuric acid (VIII) dehydration cyclization in acetic anhydride at a temperature of from 20 to 100 ° C, preferably 50 to 90 ° C, for 0.1 to 30 hours, preferably 0.1 to 3 hours. Then the diazonium salt (VI) is reacted with the derivative of 2-phenyl-2-oxazolin-5-one 20 (VII) at a temperature of from -50 to 100 ° C, preferably -30 to 40 ° C, in 0.01 to 20 hours, preferably 0.1 to 10 hours, to give the compound represented by formula (II).

Den foreliggende opfindelse vil herefter blive beskrevet mere 25 præcist under henvisning til de følgende eksempler.The present invention will now be described more precisely with reference to the following examples.

Eksempel 1Example 1

Syntese af 3- (2.2,3.3.3-pentafluorpropoxv)methvl-4-methvl- 1-nitrobenzen (forbindelse med formlen (A). hvor R er CH2CF2CF3. X1 er 4-CH3 og X2 er H) 8 DK 171934 B1Synthesis of 3- (2.2,3.3.3-pentafluoropropoxy) methyl-4-methyl-1-nitrobenzene (compound of formula (A). Wherein R is CH 2 CF 2 CF 3. X 1 is 4-CH 3 and X 2 is H) 8 DK 171934 B1

NONO

ιέχ Y'ch2och2cp2cp3 CB3ιέχ Y'ch2och2cp2cp3 CB3

Der blev til en opløsning af 5,00 g (0,027 mol) 2-methyl-5-nitrobenzylchlorid og 21,3 g (0,135 mol) 2,2,3,3,3-penta-fluorpropanol i 16,5 ml dimethylformamid sat 2,29 g (0,041 mol) KOH-pellet og opløsningen blev omrørt natten over. Der-5 efter blev dichlormethan tilsat, og saltene blev filtreret fra. Filtratet blev gjort surt og derefter blev opløsningsmidlerne destilleret af. Resten blev opløst i et blandet 9/1 (vol/vol) opløsningsmiddel af hexan/ethylacetat, vasket med fortyndet saltsyre, vand og en mættet vandig natriumchlorid-10 opløsning og derefter tørret over magnesiumsulfat. Opløsningsmidlerne blev destilleret af og den resulterende olie blev underkastet silicagelkromatografi under anvendelse af hexan/ethylacetat (19/1, vol/vol), som fremkaldelsesopløsningsmiddel til opnåelse af 7,71 g 3-(2,2,3,3,3-pentafluor-15 propoxy)methyl-4-methyl-l-nitro-benzen med et smeltepunkt på 53,5-54,5°C i et udbytte på 95,5%.To a solution of 5.00 g (0.027 mol) of 2-methyl-5-nitrobenzyl chloride and 21.3 g (0.135 mol) of 2,2,3,3,3-pentafluoropropanol in 16.5 ml of dimethylformamide were added 2.29 g (0.041 mol) of the KOH pellet and the solution were stirred overnight. Then dichloromethane was added and the salts were filtered off. The filtrate was acidified and then the solvents were distilled off. The residue was dissolved in a mixed 9/1 (v / v) solvent of hexane / ethyl acetate, washed with dilute hydrochloric acid, water and a saturated aqueous sodium chloride-10 solution, and then dried over magnesium sulfate. The solvents were distilled off and the resulting oil was subjected to silica gel chromatography using hexane / ethyl acetate (19/1, v / v) as the developing solvent to give 7.71 g of 3- (2,2,3,3,3-pentafluoro -15 propoxy) methyl-4-methyl-1-nitro-benzene with a melting point of 53.5-54.5 ° C in a yield of 95.5%.

Eksempel 2Example 2

Syntese af 3-(2.2.3.3.3-pentafluorpropoxv)methvl-4-methvlanilin (forbin-20 delsen med formlen (A), hvori R er CH2CF2CF3, X1 er 4-CH3 oa X2 er H) NH, (έχ γ* ch2och2cf2cf3 ch3 7,30 g (0,0244 mol) af den i eksempel 1 opnåede nitroforbin-delse blev opløst i 40 ml ethanol. Opløsningen blev tilsat 9 DK 171934 B1 0,1 g 10% Pd-C og 3,66 g (0,073 mol) hydrazinhydrat og opvarmet under tilbagesvaling på et varmt vandbad i en time. Efter at have fået lov til at afkøle af sig selv, blev opløsningen ført gennem et celitlag for at filtrere katalysatoren fra og 5 derefter vaske med ethanol. Filtratet blev inddampet, opløst i dichlormethan, vasket med vand, en mættet vandigt natrium-bicarbonatopløsning og en mættet vandig natriumchloridopløs-ning og tørret over vandfrit kaliumcarbonat. Opløsningsmidlerne blev destilleret af og resten blev fraktionsdestilleret, 10 idet fraktionen med et kogepunkt på 82-83°C ved 0,18 mm Hg, blev opsamlet. Der blev opnået 6,09 g 3-(2,2,3,3,3-penta-fluorpropoxy)methyl-4-methylanilin i et udbytte på 93%.Synthesis of 3- (2.2.3.3.3-pentafluoropropoxy) methyl-4-methylaniline (the compound of formula (A) wherein R is CH 2 CF 2 CF 3, X 1 is 4-CH 3 and X 2 is H) NH, (έχ γ * ch 2 and 2 cf 2 cf 3 ch 3 7.30 g (0.0244 mol) of the nitro compound obtained in Example 1 were dissolved in 40 ml of ethanol, the solution was added 9 g 171934 B1 0.1 g 10% Pd-C and 3.66 g ( 0.073 mol) of hydrazine hydrate and heated under reflux on a hot water bath for one hour.After allowing to cool by itself, the solution was passed through a pad of celite to filter the catalyst off and then washed with ethanol.The filtrate was evaporated, dissolved in dichloromethane, washed with water, a saturated aqueous sodium bicarbonate solution and a saturated aqueous sodium chloride solution and dried over anhydrous potassium carbonate.The solvents were distilled off and the residue was fractionally distilled, the fraction having a boiling point of 0 DEG-82 DEG-82 DEG. , 18 mm Hg, was collected to give 6.09 g of 3- (2,2,3,3,3-penta-fluoropropoxy) methyl-4-methyl thylaniline in a yield of 93%.

Eksempel 3Example 3

Syntese af 4-ΓΓ3-(2.2.3,33-pentafluorpropoxv)methvl-4-me-15 thvlphenvllhvdrazonol-2-phenvl-2-oxazolin-5-on (forbindelsen med formlen (II). hvori R er CH2CF2CF3. X1 er 4-CH3 og X2, Y1 oa alle er H) n NNH-<^-C83 II CH-OCH,CF-CF3 (0Γ0 0Synthesis of 4- [3- (2.2.3,33-pentafluoropropoxy) methyl-4-methylphenyl] hydrazonol-2-phenyl-2-oxazolin-5-one (the compound of formula (II) wherein R is CH 2 CF 2 CF 3. X 1 is 4-CH3 and X2, Y1 oa all are H) n NNH - <^ - C83 II CH-OCH, CF-CF3 (0Γ0 0

Der blev til en blandet opløsning af 6,9 ml eddikesyre og 1,8 ml koncentreret saltsyre sat 2,71 g (0,0101 mol) af det i ek-20 sempel 2 opnåede anilinderivat, efterfulgt af dråbevis tilsætning af en opløsning af 0,729 g (0,0106 mol) natriumnitrit i 2 ml vand ved en temperatur under 0°C til fremstilling af en diazoniumsaltopløsning.To a mixed solution of 6.9 ml of acetic acid and 1.8 ml of concentrated hydrochloric acid was added 2.71 g (0.0101 mol) of the aniline derivative obtained in Example 2, followed by dropwise addition of a solution of 0.729 g (0.0106 mol) of sodium nitrite in 2 ml of water at a temperature below 0 ° C to prepare a diazonium salt solution.

Separat blev 2,08 g (0,0116 mol) hippursyre sat til 5,7 ml 25 (0,0604 mol) eddikesyreanhydrid og omrørt ved 80°C i 10 min.Separately, 2.08 g (0.0116 mol) of hippuric acid was added to 5.7 ml of 25 (0.0604 mol) acetic anhydride and stirred at 80 ° C for 10 minutes.

til opnåelse af en opløsning af 2-phenyl-2-oxazolin-5-on. Denne opløsning blev afkølet til -20°C og tilsat 1,65 g vandfrit natriumacetat.to obtain a solution of 2-phenyl-2-oxazolin-5-one. This solution was cooled to -20 ° C and 1.65 g of anhydrous sodium acetate was added.

DK 171934 Bl 10DK 171934 Bl 10

Der blev til denne opløsning sat den i forvejen fremstillede diazoniumsaltopløsning under omrøring og den blandede opløsning blev yderligere omrørt ved -20 til -10°C i 2 timer, og derefter ved stuetemperatur i 5 timer. Derefter blev der sat 5 vand til opløsningen og de præcipiterede krystaller blev filtreret fra, vasket godt med vand og tørret til opnåelse af 3,65 g (82,2% udbytte) 4-[[3-(2,2,3,3,3-pentafluorpropoxy)me-thyl-4-methylphenyl] hydrazono] -2-phenyl-2-oxazolin-5-on. Omkrystallisation deraf ud fra methylenchloridhexan gav orange-10 farvede nålelignende krystaller (smeltepunkt 160-161°C).To this solution was added the pre-prepared diazonium salt solution with stirring, and the mixed solution was further stirred at -20 to -10 ° C for 2 hours, and then at room temperature for 5 hours. Then 5 water was added to the solution and the precipitated crystals were filtered off, washed well with water and dried to give 3.65 g (82.2% yield) of 4 - [[3- (2,2,3,3 (3-pentafluoropropoxy) methyl-4-methylphenyl] hydrazono] -2-phenyl-2-oxazolin-5-one. Recrystallization thereof from methylene chloride-hexane gave orange-colored needle-like crystals (m.p. 160-161 ° C).

Referenceeksempel 1Reference Example 1

Syntese af 1-Γ3-(2,2,3.3.3-pentafluorpropoxy)methvl-4-me-thvll -phenvl-5-phenvl-lH-l.2,4-triazol-3-carboxamid I 46 ml acetone blev 3,30 g (7,5 mmol) af den i eksempel 3 15 opnåede 4- [ [3- (2,2,3,3,3-pentafluorpropoxy)methyl- 4-methyl-phenyl]hydrazono]-2-phenyl-2-oxazolin-5-on suspenderet. Til denne suspension blev der sat 1,5 ml koncentreret ammoniakvand, efterfulgt af en times omrøring. Den resulterende opløsning blev gjort sur med 1,6 ml koncentreret saltsyre og 20 yderligere omrørt ved 40 til 50°C i 30 min. Acetone blev destilleret af og resten blev ekstraheret med benzen. Det organiske lag blev tørret over vandfrit natriumsulfat og opløsningsmidlerne blev destilleret af til opnåelse af et ubehandlet produkt. Dette ubehandlede produkt blev oprenset ved si-25 licagelkromatograf i under anvendelse af CI^C^/MeOH (97/3, vol./vol.) som fremkaldelsesopløsningsmiddel og yderligere omkrystalliseret til opnåelse af 3,145 g (95,5% udbytte) af 1-(3-(2,2,3,3,3-pentafluorpropoxy)methyl-4-methyl]phenyl-5-phenyl-lH-1,2,4-triazol-3-carboxamid (smeltepunkt 127-129°C).Synthesis of 1- [3- (2,2,3,3,3-pentafluoropropoxy) methyl-4-methyl-phenyl-5-phenyl-1H-1,2,4-triazole-3-carboxamide In 46 ml of acetone was 3 30 g (7.5 mmol) of the 4 - [[3- (2,2,3,3,3-pentafluoropropoxy) methyl-4-methyl-phenyl] hydrazono] -2-phenyl- 2-oxazolin-5-one suspended. To this suspension was added 1.5 ml of concentrated ammonia water, followed by stirring for one hour. The resulting solution was acidified with 1.6 ml of concentrated hydrochloric acid and further stirred at 40 to 50 ° C for 30 minutes. Acetone was distilled off and the residue was extracted with benzene. The organic layer was dried over anhydrous sodium sulfate and the solvents were distilled off to give a crude product. This crude product was purified by silica gel chromatography using C - (3- (2,2,3,3,3-pentafluoropropoxy) methyl-4-methyl] phenyl-5-phenyl-1H-1,2,4-triazole-3-carboxamide (m.p. 127-129 ° C) .

11 DK 171934 B111 DK 171934 B1

Referenceeksempel 2Reference Example 2

Syntese af 1-f4-methvl-3-f(3-methvlbutoxv)methvllphenvll- 5-phenvl-lH-l.2.4-triazol-3-carboxamid 1,668 g (4,4 mmol) 4-[ [4-methyl-3-(3-methylbutoxy)methylphe-5 nyl]hydrazono]-2-phenyl-2-oxazolin-5-on syntetiseret på en måde svarende til eksemplerne 1-3 blev suspenderet i 40 ml acetone efterfulgt af tilsætningen af 1,3 ml koncentreret saltsyre og en times omrøring. Den resulterende opløsning blev gjort sur ved at tilsætte 1,5 ml koncentreret saltsyre 10 og yderligere omrørt ved 40-50°C i 30 min. Acetone blev destilleret af og resten blev ekstraheret med benzen. Det organiske lag blev tørret over vandfrit natriumsulfat og opløsningsmidlerne blev destilleret af til opnåelse af et ubehandlet produkt. Oprensning af dette ubehandlede produkt ved 15 hjælp af silicagelkromatografi under anvendelse af CH2C12/-MeOH (97/3, vol./vol.) som fremkaldelsesopløsningsmiddel og yderligere omkrystallisation gav 1,498 g (90,00% udbytte) 1-[4-methyl-3-[(3-methylbutoxy)methyl]phenyl]-5-phenyl-IH-1,2,- 4-triazol-3-carboxamid (smeltepunkt 83-85°C).Synthesis of 1- [4-methyl-3- [3- (3-methylbutoxy) methyl] phenyl] -5-phenyl-1H-1,2,4-triazole-3-carboxamide 1,668 g (4.4 mmol) of 4 - [[4-methyl-3 - (3-methylbutoxy) methylphenyl] hydrazono] -2-phenyl-2-oxazolin-5-one synthesized in a manner similar to Examples 1-3 was suspended in 40 ml of acetone followed by the addition of 1.3 ml of concentrated hydrochloric acid and stirring for one hour. The resulting solution was acidified by adding 1.5 ml of concentrated hydrochloric acid and further stirring at 40-50 ° C for 30 minutes. Acetone was distilled off and the residue was extracted with benzene. The organic layer was dried over anhydrous sodium sulfate and the solvents were distilled off to give a crude product. Purification of this crude product by silica gel chromatography using CH 2 Cl 2 / -MeOH (97/3, v / v) as a developing solvent and further recrystallization gave 1.498 g (90.00% yield) of 1- [4-methyl- 3 - [(3-methylbutoxy) methyl] phenyl] -5-phenyl-1H-1,2,4-triazole-3-carboxamide (m.p. 83-85 ° C).

20 Referenceeksempel 3Reference Example 3

Syntese af l-(3-butoxvmethvl-4-chlorphenvl)-5-phenvl-lH-l.2.- 4-triazol-3-carboxamid 1,157 g (3 mmol) 4-[(3-butoxymethyl-4-chlorphenyl)hydrazono]- 2-phenyl-2-oxazolin-5-on, som var syntetiseret på en måde sva-25 rende til eksemplerne 1-3,blev suspenderet i 10 ml acetone, hvorefter der til suspensionen blev sat 0,6 ml koncentreret ammoniakvand og omrørt ved stuetemperatur i 30 min. Den resulterende opløsning blev gjort sur ved at tilsætte 0,6 ml koncentreret saltsyre og yderligere omrørt ved 50°C i 30 min.Synthesis of 1- (3-butoxymethyl-4-chlorophenyl) -5-phenyl-1H-1,2-4-triazole-3-carboxamide 1.157 g (3 mmol) 4 - [(3-butoxymethyl-4-chlorophenyl) hydrazono] -2-phenyl-2-oxazolin-5-one, which was synthesized in a manner similar to Examples 1-3, was suspended in 10 ml of acetone, after which 0.6 ml of concentrated ammonia water was added to the suspension. and stirred at room temperature for 30 min. The resulting solution was acidified by adding 0.6 ml of concentrated hydrochloric acid and further stirring at 50 ° C for 30 minutes.

30 Acetone blev destilleret af og resten blev ekstraheret ved tilsætning af benzen og vand. Det organiske lag blev vasket med en mættet vandig natriumchloridopløsning og tørret over 12 DK 171934 B1 vandfrit natriumsulfat. Opløsningsmidlerne blev destilleret af til opnåelse af et ubehandlet produkt. Dette ubehandlede produkt blev oprenset ved silicagelkromatografi under anvendelse af hexan/ethylacetat (1/2, vol./vol.) som fremkaldel-5 sesopløsningsmiddel og yderligere omkrystalliseret til opnåelse af 1,087 g (94,2% udbytte) 1-(3-butoxymethyl-4- chlor-phenyl)-5-phenyl-IH-1,2,4-triazol-3-carboxamid (smeltepunkt 96-98°C).Acetone was distilled off and the residue was extracted by adding benzene and water. The organic layer was washed with a saturated aqueous sodium chloride solution and dried over anhydrous sodium sulfate. The solvents were distilled off to give an untreated product. This crude product was purified by silica gel chromatography using hexane / ethyl acetate (1/2, v / v) as the developing solvent and further recrystallized to give 1.087 g (94.2% yield) of 1- (3-butoxymethyl -4-chloro-phenyl) -5-phenyl-1H-1,2,4-triazole-3-carboxamide (m.p. 96-98 ° C).

Referenceeksempel 4 10 Syntese af l-f4-chlor-3-r(3-methvlbutoxv)methvnphenvl1-5-(2-fluorphenvl)-1H-12.4-triazol-3-carboxamid 1,294 g (3 mmol) 4-[4-chlor-3-[(3-methylbutoxy)methyl)phenyl-hydrazono]-2-(2-fluorphenyl)-2-oxazolin-5-on, som var syntetiseret på en måde svarende til eksemplerne 1-3 blev suspen-15 deret i 10 ml acetone, efterfulgt af tilsætning af 0,6 ml koncentreret ammoniakvand og 30 minutters omrøring ved stuetemperatur. Den resulterende opløsning blev gjort sur ved tilsætning af 0,6 ml koncentreret saltsyre og yderligere omrørt ved 50°C i 30 min. Acetone blev destilleret af og resten 20 blev ekstraheret ved tilsætning af benzen og vand. Det organiske lag blev vasket med en mættet vandig natriumchloridop-løsning og tørret over vandfrit natriumsulfat. Opløsningsmidlerne blev destilleret af til opnåelse af et ubehandlet produkt, og dette ubehandlede produkt blev oprenset ved at un-25 derkaste det silicagelkromatografi under anvendelse af hexan/ ethylacetat (1/2, vol./vol.) som fremkaldelsesopløsningsmiddel og omkrystalliseret ud fra ethylacetat-hexan til opnåelse af 1,062 g (82,3% udbytte) 1-[4-chlor-3-[(3-methylbutoxy)methyl) -phenyl)-5-(2-fluorphenyl)-1H-1,2,4-triazol-3-carboxamid 30 (smeltepunkt 113-115°C).Reference Example 4 Synthesis of 1- [4-chloro-3- [(3-methylbutoxy) methyl] phenyl] -5- (2-fluorophenyl) -1H-12,4-triazole-3-carboxamide 1,294 g (3 mmol) of 4- [4-chloro -3 - [(3-methylbutoxy) methyl) phenyl-hydrazono] -2- (2-fluorophenyl) -2-oxazolin-5-one synthesized in a manner similar to Examples 1-3 was suspended in 10 ml of acetone, followed by the addition of 0.6 ml of concentrated ammonia water and stirring for 30 minutes at room temperature. The resulting solution was acidified by adding 0.6 ml of concentrated hydrochloric acid and further stirring at 50 ° C for 30 minutes. Acetone was distilled off and the residue was extracted by adding benzene and water. The organic layer was washed with a saturated aqueous sodium chloride solution and dried over anhydrous sodium sulfate. The solvents were distilled off to give a crude product, and this crude product was purified by subjecting it to silica gel chromatography using hexane / ethyl acetate (1/2, v / v) as a developing solvent and recrystallized from ethyl acetate. hexane to give 1.062 g (82.3% yield) of 1- [4-chloro-3 - [(3-methylbutoxy) methyl) phenyl) -5- (2-fluorophenyl) -1H-1,2,4- triazole-3-carboxamide (m.p. 113-115 ° C).

Claims (3)

13 DK 171934 B113 DK 171934 B1 1. Benzyletherderivat kendetegnet ved formlen A ZBenzyl ether derivative characterized by the formula A Z 5 X1—IOL (*> h2or X2 hvori R er en ikke-substitueret, ligekædet alkylgruppe med 4 til 10 carbonatomer, en ikke-substitueret, forgrenet alkylgruppe med 4 til 10 carbonatomer, en alkylgruppe med 1 til 3 carbonatomer, som er substitueret med en alicyklisk struktur 10 med 3 til 7 carbonatomer, en phenylgruppe eller en aralkyl-gruppe med 7 til 9 carbonatomer; X1 er halogen eller en alkylgruppe med 1 til 3 carbonatomer; X2 er hydrogen, halogen eller en alkylgruppe med 1 til 3 carbonatomer; og Z er NH2 eller N02 med den forudsætning, at 15 (i) når X1 er en ethylgruppe i 4- eller 6-stillingen og X2 er hydrogen, er R ikke en phenylgruppe og (ii) når en af X1 og X2 er en 2-methylgruppe og den anden er en 6-methylgruppe, er R ikke en ligekædet eller forgrenet C4-Cg-alkylgruppe, en phenylgruppe eller en benzylgruppe.X 1 - IOL (*> h2or X 2 wherein R is an unsubstituted, straight chain alkyl group having 4 to 10 carbon atoms, an unsubstituted branched alkyl group having 4 to 10 carbon atoms, an alkyl group having 1 to 3 carbon atoms substituted with an alicyclic structure 10 having 3 to 7 carbon atoms, a phenyl group or an aralkyl group having 7 to 9 carbon atoms; X1 is halogen or an alkyl group having 1 to 3 carbon atoms; X2 is hydrogen, halogen or an alkyl group having 1 to 3 carbon atoms; and Z is NH 2 or NO 2 with the proviso that (i) when X 1 is an ethyl group in the 4- or 6-position and X 2 is hydrogen, R is not a phenyl group and (ii) when one of X 1 and X 2 is a 2- methyl group and the other is a 6-methyl group, R is not a straight or branched C 4 -C 8 alkyl group, a phenyl group or a benzyl group. 2. Benzyletherderivat kendetegnet ved formlen A' Z X2 hvori R er en ligekædet alkylgruppe med 2 til 10 carbonatomer, som er substitueret med 3 til 19 fluoratomer, eller en forgrenet alkylgruppe med 3 til 10 carbonatomer, som er sub 14 DK 171934 B1 stitueret med 3 til 19 fluoratomer; X1 er halogen eller en alkylgruppe med 1 til 3 carbonatomer; X2 er hydrogen, halogen eller en alkylgruppe med 1 til 3 carbonatomer; og Z er NH2 eller N02.Benzyl ether derivative characterized by the formula A 'Z X2 wherein R is a straight chain alkyl group having 2 to 10 carbon atoms which is substituted by 3 to 19 fluorine atoms or a branched alkyl group having 3 to 10 carbon atoms substituted by sub 14 DK 171934 B1 substituted by 3 to 19 fluorine atoms; X 1 is halogen or an alkyl group having 1 to 3 carbon atoms; X 2 is hydrogen, halogen or an alkyl group having 1 to 3 carbon atoms; and Z is NH 2 or NO 2. 3. Benzyletherderivat ifølge krav 2, som er 3-(2,2,3,3,3- pentafluorpropoxy)methyl-4-methyl-1-nitrobenzen.A benzyl ether derivative according to claim 2, which is 3- (2,2,3,3,3-pentafluoropropoxy) methyl-4-methyl-1-nitrobenzene.
DK128892A 1987-06-19 1992-10-22 Benzyl ether derivatives DK171934B1 (en)

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