Abstract
This article describes our recent synthetic studies on some kinds of alkaloids, which possess various carbon substituted piperidine parts in their structures, starting from a common synthon, N-substituted 1, 6-dihydro-3(2H)-pyridinone. Syntheses of catharanthine, ibogamine, epiibogamine, tabersonine, cleavamine, eburnamonine, corynantheidol, quinine, and tecomanine are involved.