An Efficient Synthesis of Optically Active Physostigmine from Tryptophan via Alkylative Cyclization
作者:Michiaki Kawahara、Atsushi Nishida、Masako Nakagawa
DOI:10.1021/ol005513p
日期:2000.3.1
[reaction: see text] A new and efficient synthetic route to physostigmine is described. Corey-Kim reagent reacted with tryptamine or tryptophan carbamates to give 3a-(methylthiomethyl)hexahydropyrrolo[2,3-b]indole skeletons. Formal total synthesis of racemic and chiral physostigmine was accomplished in excellent overall yields, in short steps.
[反应:见正文]描述了一种新的高效合成毒扁豆碱的途径。Corey-Kim试剂与色胺或色氨酸氨基甲酸酯反应生成3a-(甲硫基甲基)六氢吡咯并[2,3-b]吲哚骨架。外消旋和手性毒扁豆碱的正式全合成可以在短时间内以优异的总收率完成。