Anti-HIV agents. III. Synthesis and in vitro anti-HIV activity of novel 1H,3H-thiazolo[3,4-a]imidazo[4,5-b]pyridines.

The one-pot synthesis of 1H,3H-thiazolo[3,4-a]imidazo[4,5-b]pyridines is described. The antiviral activity against human immunodeficiency virus (HIV) of the compounds obtained was explored: 1-(2',6'-dichlorophenyl) (5g) and 1-(2',6'-difluorophenyl)-1H,3H-thiazolo- [3,4-a]imidazo[4,5-b]pyridine (5h) exhibit reproducible in vitro anti-HIV activity.