Mono- and Bis-Pyrimido[1,2-a]benzimidazoles: Alum Catalyzed Regioselective Three- or Pseudo Five-Component Reaction of 2-Aminobenzimidazole with Aldehyde and Malononitrile
Mono- and Bis-Pyrimido[1,2-a]benzimidazoles: Alum Catalyzed Regioselective Three- or Pseudo Five-Component Reaction of 2-Aminobenzimidazole with Aldehyde and Malononitrile
作者:Ali R. Karimi、Fahimeh Bayat
DOI:10.2174/157017811799304368
日期:2011.11.1
A series of mono- and bis-pyrimido-[1,2-a]benzimidazole derivatives is synthesized by the regioselective multicomponent condensation reaction of aldehyde and malononitrile with 2-aminobenzimidazole in the presence of alum as a recyclable and efficient catalyst for this condensation.