Method for Production of Substituted Phenylmalonate Esters, Novel Phenylmalonate Esters and Use Thereof

摘要

A process for preparing substituted phenylmalonic esters of the formula in which R is alkyl and Q is halogen, alkyl, alkoxy, haloalkyl or haloalkoxy and the index m is an integer from 1 to 5, where the groups Q can be identical or different if the index m is greater than 1, comprising steps A), B) and C): A) reaction of compounds of the formula II, in which the variables are as defined for formula I to give compounds of the formula III, B) conversion of the compounds of the formula III into ketals of the formula IV in which R' is C₁-C₄-alkyl or benzyl, C) hydrolysis of the compounds of the formula IV to give compounds of the formula I; novel phenylmalonic ester derivatives, and their use as intermediates.