Enantioselective Diels-Alder reactions catalyzed by chiral magnesium lewis acids prepared from hydroxysulfoxides
作者:M. Ordoñez、V. Guerrero-de la Rosa、V. Labastida、J.M. Llera
DOI:10.1016/0957-4166(96)00344-8
日期:1996.9
Enantioselective Diels-Alder reactions were conducted successfully using chiral magnesium complexes prepared from magnesium iodide and chiral hydroxysulfoxides derived from (R)- and (S)-methyl 1-naphthyl sulfoxide. Convenient methods for the preparation of these chiral sulfoxides have also been developed. Hydroxysulfoxide 6 (and its enantiomer 10) showed the highest enantioselectivity. Copyright (C) 1996 Elsevier Science Ltd
A new approach to the asymmetric cyclopropanation via a chiral sulfinyl group
作者:Chafiq Hamdouchi
DOI:10.1016/s0040-4039(00)91710-6
日期:1992.3
High stereoselectivity and highyield are observed in the Michael addition of dimethyl sulfoxonium methylide to an optically pure methyl α-(p-tolylsulfinyl) acrylate. A novelroute to the asymmetric synthesis of electrophilic cyclopropanes.