摘要:
                                Selected imines of methyl glyoxylate act as good partners in the Staudinger cycloaddition reaction with a series of substituted ketenes. The cis stereoselectivity is almost complete with electron-donor substituted ketenes, but the asymmetric induction is low when imines derived From chiral 1-aryl-ethylamines are used. (C) 1998 Elsevier Science Ltd. All rights reserved.