One-step synthesis of 3,4-dihydrobenzimidazo[2,1-b]quinazolin-1(2H)-ones in an ionic liquid

Abstract

A novel class of 3,4-dihydrobenzimidazo[2,1-b]quinazolin-1(2H)-ones was synthesized in very short reaction times with good yields in the presence of 3-butyl-1-methyl imidazolium bromide as a room temperature ionic liquid at 120°C. The ionic liquid can be recycled for subsequent reactions without any loss of efficiency. © Springer-Verlag 2007.