A New Non-Cross-Linked Polystyrene Supported 2-Phenylimino-2-oxazolidine Chiral Auxiliary: Synthesis and Application in Asymmetric Alkylation Reactions
作者:Fu-Qiang Hu、De-Xin Xia、Cui-Fen Lu、Zu-Xing Chen、Gui-Chun Yang
DOI:10.1002/ejoc.201000981
日期:2010.10
The synthesis of novel non-cross-linkedpolystyrenesupported 2-phenylimino-2-oxazolidine is described, and its use as a chiralauxiliary in asymmetric alkylation reactions is demonstrated by the synthesis of several chiral amides (>96 % ee). Furthermore, recovery and recycling of the polymer-supported chiralauxiliary were successfully achieved without appreciable reduction in the yield or stereoselectivity