One-Pot Multicomponent Condensation Reaction of Aldehydes with Cyclic Ketones

[image omitted] Under microwave irradiation, the one-pot multicomponent condensation reaction of three molar aromatic aldehydes with two molar cyclic ketones having free ,'-methylene positions such as cyclopentanone or cyclohexanone in the presence of ammonium acetate and acetic acid afforded dicyclocalkenopyridines with two -arylidene groups in good yields. In similar reaction conditions, 1-tetralone, which has only one -methylene position, results in 10-aryl-2,3:5,6-dibenzoacridines.