Production of triazolinones

C - Chemistry – Metallurgy – 07 – D

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C07D 249/12 (2006.01)

Patent

CA 2059531

ABSTRACT: Process for the production of an aryl triazolinone of the formula: Formula I Image in which R is halogen, alkyl, haloalkyl, cyanoalkyl, aryl- alkyl, alkoxyalkyl, alkylthio, alkylsulfinyl, alkyl- sulfonyl, alkylthioalkyl, alkylsulfinylalkyl, alkyl- sulfonylalkyl or phenyl, each X is independently, H, halogen, lower alkyl, lower alkoxy, -NO2, -OH, -NHSO2R', -N(SO2R')2 or -N(R')SO2R' where R' is lower alkyl, and n is a number from 1 to 3, by treating an aryl triazolidinone of the formula: Formula II Image with a halogen of the group consisting of chlorine, bromine and iodine, or a hypohalous acid of said halogen or a salt of said acid.

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