Synthesis of Functionalized 1,2,3,4-Tetrahydro-β-carboline Derived Enamines through Bischler-Napieralski Type Cyclization of Polarized Ketene N,S-Acetals - Chakrabarti, Sriparna; Panda, Kausik; Ila, Hiriyakkanavar; Junjappa, Hiriyakkanavar (Synlett, 2005)