Highly efficient, mild, one pot synthesis of 2-substituted benzimidazoles, benzothiazoles and pyridoimidazoles promoted by N-iodosuccinimide

A common and highly efficient metal-free route for the synthesis of 2-substituted benzimidazoles, benzothiazoles and pyridoimidazoles from suitable 1,2-difunctionalised aromatic compounds and various aromatic and aliphatic aldehydes and ferrocenecarboxaldehyde was developed using N-iodosuccinimide as the oxidizing agent. The methodology involved very short reaction time, mild reaction procedure and easy work-up as Well as excellent yields of the products.