作者:Martha S. Morales-Ríos、María A. Bucio、Pedro Joseph-Nathan
DOI:10.1016/0040-4020(96)00176-7
日期:1996.4
The formal synthesis of the indolealkaloid (±)-physostigmine (1) from (Z)-2-hydroxy-5-methoxyindolenine9 is described. The key step of the synthesis is a novel diasteroselective conjugated addition of a Grignard reagent to 9. The relative stereochemistry of the newly formed contiguous chiral centers is established by X-ray crystallography. The stereocontrolled conjugated addition involves the directing