Imidazo[1,2-b]Pyridazines. XVIII. Syntheses and Central Nervous System Activities of Some 6-, 7- and 8-(Chloro and methoxy)imidazo[1,2-a]pyridine Analogs

Abstract

Syntheses are reported for some 2-aryl-3-(benzamidomethyl and methoxy)-6(7 and 8)-chloro- and 6(and 8)-methoxy-imidazo[1,2-a]pyridines. In tests of the ability of these compounds to displace [³H]diazepam from rat brain membrane, those with 6-chloro and 6-methoxy groups bound most strongly, and relatively small differences only were observed between corresponding imidazo[1,2-a]pyridines and imidazo[1,2-b]pyridazines.