Patent ID: 9567292
Date: 2017-02-14
CPC Classifications: C07C

Claim:
1. A one-pot process for the preparation of 2,3-dihydroxy benzonitrile of Formula I, comprising the steps of: a) reacting an acid compound of Formula II wherein R 1 and R 2 are each independently H or C 1-4 alkyl group, with a halogenating reagent in presence of a solvent to obtain a corresponding benzoic acid halide; b) reacting the benzoic acid halide with a source of ammonia to obtain a corresponding amide of Formula III c) treating the amide compound with a dehydrating reagent to obtain the compound of Formula IV and d) dealkylating the compound of Formula IV with a dealkylating agent in an organic solvent; wherein the steps a) to d) are carried out in a single step without isolating any intermediates.