Synthesis of amidoalkyl chromen-2-ones by one pot three component reaction under solvent free conditions

A mild and efficient method for the functionalization of chromen-2-ones with amidoalkyl derivatives have been developed starting from 4-trifluoromethyl substituted chromen-2-ones, aromatic aldehydes and acetamide promoted by stannous chloride dihydrate in a one pot three component reaction under solvent free condition. Simple reaction conditions, high yields and environmentally benign procedure are the advantage of this protocol.