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).