α-Lithiation-rearrangement of N-toluenesulfonyl aziridines with sec-butyllithium and (−)-sparteine: opposite sense of asymmetric induction to epoxides
作者:Peter O'Brien、Clare M Rosser、Darren Caine
DOI:10.1016/s0040-4039(03)01677-0
日期:2003.8
The alpha-lithiation rearrangement of three cyclic N-toluenesulfonyl (tosyl) aziridines has been carried out using sec-butyl-lithium/(-)-sparteine. In each case, it was established that preferential lithiation of the S-aziridine stereocentre occurred. This is the opposite sense of asymmetric induction to that observed with epoxides. (C) 2003 Elsevier Ltd. All rights reserved.