Application of Triphenylammonium Tricyanomethanide as an Efficient and Recyclable Nanostructured Molten-Salt Catalyst for the Synthesis of N -Benzylidene-2-arylimidazo[1,2- a ]pyridin-3-amines

Article abstract of DOI:10.1055/s-0036-1558965

Triphenylammonium tricyanomethanide (Ph ₃ NH)[C(CN) ₃ ] was synthesized and used as an efficient and recyclable nanostructured molten-salt (NMS) catalyst for the synthesis of N -benzylidene-2-arylimidazo[1,2- a ]pyridin-3-amines by the reaction of various (het)aryl aldehydes with trimethylsilyl cyanide and pyridin-2-amine under solvent-free conditions at 50 °C. The NMS catalyst could be simply recycled and reused several times without significant loss of its catalytic activity.