摘要:
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.