Abstract Under microwave irradiation, the one-pot multicomponent condensation reaction of three molar aromatic aldehydes with two molar cyclic ketones having free α, α′-methylene positions such as cyclopentanone or cyclohexanone in the presence of ammonium acetate and acetic acid afforded dicyclocalkenopyridines with two α-arylidene groups in good yields. In similar reaction conditions, 1-tetralone, which has only one α-methylene position, ...
![(3E,5E)-3,5-dibenzylidene-8-phenyl-1,2,6,7-tetrahydrodicyclopenta[2,1-b:2',1'-f]pyridine Structure](https://image.chemsrc.com/caspic/120/65758-63-6.png)