Phase-transfer catalytic synthesis and hypocholesterolemic activity of thiazino[3,2-a]benzimidazole and its silicon analog

Abstract

The reaction of 2-mercaptobenzimidazole with 1,3-dichloropropane or bis(chloromethyl)dimethylsilane in the two-phase catalytic system of solid K2CO3-18-crown-6-toluene at 111°C leads to a selective formation of tricyclic benzimidazole sulfides in 56 and 92% yields. The synthesized compounds were tested as hypocholesterolemic agents.