申请人:Merrell Dow Pharmaceuticals Inc.
公开号:US04650872A1
公开(公告)日:1987-03-17
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.
本文描述了作为抗过敏剂有用的5-氯-3-(取代)-s-三唑并[4,3-a]吡啶-7-羧酸。这些化合物是从适当的取代的4-位三氯甲基基团或氰基的酰基6-氯-2-叠氮吡啶,通过与聚磷酸的反应制备而成。