A New Approach to Di- and Tetrasubstituted 2,3-Dihydropyridin-4(1H)-ones through Aza-Diels-Alder Reaction Promoted by Silicon Tetrachloride - Massa, Antonio; de Sio, Vincenzo; Villano, Rosaria; Acocella, M. Rosaria; Palombi, Laura; Sellitto, Giusi; Peduto, Antonella; Filosa, Rosanna; De Capraris, Paolo; Scettri, Arrigo (Synthesis, 2009)