Palladium-catalyzed intramolecular arylation of an anilide enolate, application to an efficient formal total synthesis of physovenine
作者:Tony Y. Zhang、Hongbin Zhang
DOI:10.1016/s0040-4039(02)00059-x
日期:2002.2
An expedient formal total synthesis of the calabar alkaloid physovenine was reported. The key step involves an oxindole synthesis via palladium-catalyzed intramolecular arylation of o-bromoanilide.
This Letter describes a versatile synthetic approach to prepare physovenine and physostigmine analogs. A series of analogs were synthesized and evaluated for cholinesterase inhibition activities, including human acetylcholinesterase (AChE) and butyrylcholinesterase (BuChE) from human serum.