The First Asymmetric Halogen/Metal-Exchange Reaction: Desymmetrization of Alcohols with Enantiotopic Bromoarene Substituents
作者:Daniel Sälinger、Reinhard Brückner
DOI:10.1002/chem.200802488
日期:2009.7.6
Choosy organomagnesium: Prochiral bis(bromoaryl)alcohols were desymmetrized by treatment with iPr2Mg and an enantiopure Li salt. The resulting arylmagnesium intermediate was trapped with electrophiles. Protonolysis and two follow‐up reactions provided the antihistaminic and anticholinergic drug (R)‐orphenadrine (see scheme).
挑剔有机镁:前手性双(溴代)醇通过用治疗desymmetrized我镨2 Mg和一个对映体纯Li盐。所得的芳基镁中间体被亲电试剂捕获。质子分解和两个后续反应提供了抗组胺药和抗胆碱能药物(R)-奥芬那君(见方案)。