example of oxyamination of azlactones with oxaziridines was realized using a chiral bisguanidinium salt. Efficient catalytic asymmetric oxyamination and kinetic resolution of oxaziridines occurred simultaneously. Various chiral oxazolin-4-one derivatives with potential biological activity were obtained (up to 92% ee). Meanwhile, a series of optically pure oxaziridines were recovered with up to 99% ee and
Asymmetric oxaziridination catalyzed by cinchona alkaloid derivatives containing sulfide
作者:Tianyi Zhang、Wei He、Xingyu Zhao、Ying Jin
DOI:10.1016/j.tet.2013.06.061
日期:2013.9
A newmethod has been developed for the asymmetric oxaziridination of aryl aldimines with m-chloroperbenzoic acid, involving the use of cinchonaalkaloid derivatives containing a sulfide moiety as a catalyst. The newmethod provided access to optically active oxaziridines in good yields with high enantiomeric excess (ee) values of up to 95%.