[EN] PRODUCTION OF OXY-MICHAEL ADDUCTS<br/>[FR] ELABORATION D'ADDUITS D'OXY-MICHAEL
申请人:UNIV CAMBRIDGE TECH
公开号:WO2004085344A3
公开(公告)日:2004-11-11
Highly stereoselective oxy-Michael additions to α,β-disubstituted nitro olefins: asymmetric synthesis of pseudo-norephedrine derivatives and THP* protected α-hydroxy ketones
作者:David J. Buchanan、Darren J. Dixon、Felix A. Hernandez-Juan
DOI:10.1039/b406804c
日期:——
delta lactol undergoes efficient oxy-Michael addition to alpha,beta-disubstituted nitroolefins to give the THP* protected Henry products with excellent (95-->98% de) stereocontrol at the beta-position and moderate (up to 3 : 1) stereocontrol at the alpha-position in favour of the syn-diastereoisomer. Nitro group reduction with in situN-Boc protection and THP* removal provides alpha,beta-disubstituted