Claisen rearrangement of allylic alcohols prepared through N-Boc-2-acyloxazolidine methodology. Application to the synthesis of trisubstituted cyclopropanes
作者:Claude Agami、François Couty、Gwilherm Evano
DOI:10.1016/s0040-4039(00)01465-9
日期:2000.10
Stereodefined allylic alcohols prepared from a (R)-phenylglycinol-derived Weinreb amide undergo a Claisen rearrangement with a high level of stereocontrol. The produced N-Boc-2-alcenyloxazolidines can be either hydrolyzed to afford enantiomerically enriched enals or further epoxidized using a two-step sequence. The resulting epoxyoxazolidines can then be transformed into trisubstituted cyclopropanes. (C) 2000 Elsevier Science Ltd. All rights reserved.