Reaction of Polarised α-Ketoketene N,N-Acetals with Dimethyl Acetylenedicarboxylate: Synthesis of Novel 5-Aroyl-1-aryl-6-arylamino-4-methoxycarbonyl-2-oxo-1,2-dihydropyridines - Aggarwal, Veena; Ila, H; Junjappa, H (Synthesis, 1983)