Synthetic applications of 2-aryl-4-piperidones. VIII. Synthesis of methyl indolo[2,3-a]quinolizidin-2-acetate

Abstract The synthesis of methyl indolo[2,3-a]quinolizidin-2-acetate (21) from 1-hydroxyethyl-2-[1-(phenylsulfonyl)-3-indolyl]piperidine-4-acetate (16) by an intramolecular cyclization induced by K t BuO is described.