ZA816768B - Esters of cyclopropane carboxylic acids related to pyrethric acid,their preparation process and their application for combatting parasites - Google Patents

Abstract

1. Claims (for the Contracting States : BE, CH, DE, FR, GB, IT, LI, LU, NL, SE) In all possible isomeric forms, or in the form of a mixture of isomers, the compounds with the formula I see diagramm : EP0050534,P45,F2 in which the cyclopropane acid copula is of 1R cis structure and the geometry of the double bond is E and in which R represents either a linear, branched or cyclic alkyl radical, saturated or unsaturated, containing from 1 to 8 carbon atoms, possibly substituted by one or more functional groups, identical or different, or an aryl group containing from 6 to 14 carbon atoms, possibly substituted by one or more functional groups, identical or different, or a heterocyclic radical possibly substituted by one or more functional groups, identical or different, X represents a halogen atom and B represents either a benzyl radical possibly substituted by one or more radicals chosen from the group composed of alkyl radicals including from 1 to 4 carbon atoms, alkenyl radicals including from 2 to 6 carbon atoms, alkenyloxy radicals including from 2 to 6 carbon atoms, alkadienyl radicals including from 4 to 8 carbon atoms, the methylene dioxy radical and halogen atoms, or a see diagramm : EP0050534,P46,F1 group in which the substituent R1 represents a hydrogen atom or a methyl radical and the substituent R2 represents a monocyclic aryl or a -CH2 -C=-CH group and in particular a 5-benzyl-3-furyl methyl group, or a see diagramm : EP0050534,P46,F2 group in which a represents a hydrogen atom or a methyl radical and R3 represents an organic aliphatic radical including from 2 to 6 carbon atoms and one or more carbon-carbon unsaturations and in particular the -CH2 -CH=CH2 , -CH2 -CH=CH-CH3 , -CH2 -CH=CH-CH=CH2 , -CH2 -CH=CH-CH2 -CH3 radical, or a see diagramm : EP0050534,P46,F3 group, in which a represents a hydrogen atom or a methyl radical, R3 retains the same significance as before, each of R'1 and R'2 , identical or different, represents a hydrogen atom, a halogen atom, an alkyl radical including from 1 to 6 carbon atoms, an aryl radical including from 6 to 10 carbon atoms, an alkyloxycarbonyl group including from 2 to 5 carbon atoms, or a cyano group, or a see diagramm : EP0050534,P46,F4 group, in which B' represents an oxygen or sulphur atom, a see diagramm : EP0050534,P46,F5 or -CH2 - group or a sulphoxide group or a sulphone group and R4 represents a hydrogen atom, a -C=-CN radical, a methyl radical, a -CONH2 radical, a -CSNH2 radical or a -C=-CH radical, R5 represents a halogen atom or a methyl radical and n represents a numeral, 0, 1 or 2, and in particular the 3-phenoxybenzyl, alpha-cyano-3-phenoxybenzyl, alpha-ethynyl-3-phenoxybenzyl, 3-benzoylbenzyl, 1-(3-phenoxyphenyl) ethyl or alpha-thioamido-3-phenoxybenzyl group, or a see diagramm : EP0050534,P47,F1 group, or a see diagramm : EP0050534,P47,F2 group, in which the substituents R6 , R7 , R8 , R9 represent a hydrogen atom, a chlorine atom, or a methyl radical and in which S/l symbolises an aromatic ring or an analogous dihydro or tetrahydro ring, or a see diagramm : EP0050534,P47,F3 group or a see diagramm : EP0050534,P47,F4 group, in which R10 represents a hydrogen atom or a CN radical, R12 represents a -CH2 -radical or an oxygen atom, R11 represents a thiazolyl or a thiadiazolyl radical, whose bond with see diagramm : EP0050534,P47,F5 can be found at any one of the available positions, R12 being linked to R11 by the carbon atom contained between the sulphur atom and a nitrogen atom, or a see diagramm : EP0050534,P48,F1 group 1. a see diagramm : EP0050534,P48,F1 group or a see diagramm : EP0050534,P48,F2 group in which R13 represents a hydrogen atom or a CN radical, or a see diagramm : EP0050534,P48,F3 group in which R13 is defined as above, and the benzoyl radical is at position 3 or 4, or a see diagramm : EP0050534,P48,F4 group in which R14 represents a hydrogen atom, a methyl, ethynyl or cyano radical and each of R15 and R16 being different, represents a hydrogen, fluorine or bromine atom, or a see diagramm : EP0050534,P48,F5 group in which R14 is defined as above, each of the R17 'S represents independently an alkyl group containing from 1 to 4 carbon atoms, an alkoxy group containing from 1 to 4 carbon atoms, an alkylthio group containing from 1 to 4 carbon atoms, an alkyl sulphonyl group containing from 1 to 4 carbon atoms, a trifluoromethyl group, a 3,4-methylene dioxy group, or a chloro, fluoro or bromo group, p represents a numeral 0, 1 or 2 and B" represents an oxygen atom or a sulphur atom. 1. Claims (for the Contracting State AT) Process for preparing, in all possible isomeric forms, or in the form of a mixture of isomers, the compounds with the formula I : see diagramm : EP0050534,P52,F3 in which R represents either a linear, branched or cyclic alkyl radical, saturated or unsaturated, containing from 1 to 8 carbon atoms, possibly substituted by one or more functional groups, identical or different, or an aryl group containing from 6 to 14 carbon atoms, possibly substituted by one or more functional groups, identical or different, or a heterocyclic radical possibly substituted by one or more functional groups, identical or different, B represents either a linear, branched or cyclic alkyl radical, saturated or unsaturated, containing from 1 to 18 carbon atoms, or the residue of an alcohol used in the synthesis of esters of the pyrethrinoid series and X represents a halogen atom, the ethylene double bond having the geometry Z or E, characterized in that an acid with the formula II : see diagramm : EP0050534,P52,F4 in which X and R retain the same significance as previously, this acid being in the form of mixtures of E or Z isomers or in the form of an E or Z isomer, the substituted cyclopropane ring being able to be in all its possible sterio-isomeric forms, or in the form of a mixture of stereo-isomers or a functional derivative of this acid, is made to react with an alcohol with the formula III : where B retains the same significance as previously or with a functional derivative of this alcohol, so as to obtain a corresponding compound with the formula I, which if desired, is submitted to the action of a selective cleavage agent of the CO2 R group so as to obtain a compound with the formula IV : see diagramm : EP0050534,P53,F1 in which B retains the same significance as previously, then, this acid with the formula IV or a functional derivative of this acid, is submitted to the action of an alcohol with the formula R-OH in which R retains its previous significance, so as to obtain a corresponding compound with the formula I.