5-CHLORO-S-TRIAZOLO/4,3-A/-PYRIDINE-7-CARBOXYLIC ACIDS

摘要

5-Chloro-3-(substituted)-s-triazolo[4,3-a]pyridine-7-carboxylic acids useful as antiallergic agents are described herein. The compounds are prepared from an appropriate acyl 6-chloro-2-hydrazinopyridine, substituted at the 4-position with a trichloromethyl group or a cyano group, by reaction with polyphosphoric acid.