A Novel and Efficient Synthesis of the Aspidosperma Alkaloid Ring System: N(a)-Benzyldeethylaspidospermidine

Article abstract of DOI:10.1021/jo00350a016

Nonoxidative photocyclization of the aryl enaminone 3 led to the formation of the hexahydrocarbazol-4-one 4.Alkylation of the anion derived from 4 with iodoacetamide and dehydration gave the tetracyclic enamide 9, which was reduced to the imine 10 with Li