Novel Pyridine-Catalyzed Reactionof Dimethyl Acetylenedicarboxylate with Aldehydes and N-Tosylimines: Efficient Synthesis of2-Benzoylfumarates and 1-Azadienes - Nair, Vijay; Sreekanth, A R; Abhilash, N; Biju, A T; Rema Devi, B; Menon, Rajeev S; Rath, Nigam P; Srinivas, R (Synthesis, 2003)