Method For Production of Substituted Phenylmalonate Esters, Intermediate Compounds and The Use Thereof for production of 5, 7-dihydroxy-6-(2,4,5-trifluorophenyl)-(1,2,4)triazolo(1,5-A)pyrimidines

摘要

A process for preparing substituted phenylmalonic esters of the formula I 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 comprising steps A) and B): A) halogenation of compounds of the formula II, in which the variables are as defined for formula I, to give compounds of the formula III, B) hydrodechlorination of the compounds of the formula III to give substituted phenylmalonic esters of the formula I; novel phenylmalonic ester derivatives, and also their use as intermediates.