Pseudo four-component reaction of salicylaldehydes and cyclic ketones with two molecules of malononitrile: A facile and efficient way to synthesize 4-[2-(dicyanomethylene)cyclic or heterocyclic]-2-amino-4H-chromenes
Keywords: Multicomponent reaction; Salicylaldehyde; Cyclic ketone; Malononitrile; Pseudo four-component reaction; 2-Amino-4H-chromene;