Desymmetrization of (<i>R</i>,<i>R</i>)-Hexa-1,5-diene-3,4-diol via Monofunctionalization and Rhodium-Catalyzed Allylic Substitution
作者:Bernd Schmidt、Lucia Staude
DOI:10.1021/jo2001337
日期:2011.4.1
A sequence of selective monoprotection and Rh-catalyzed enantioconservative allylic substitution is established as a desymmetrizationstrategy for C2-symmetric hexa-1,5-diene-3,4-diol. A benzyl protectinggroup and ethyl carbonate as a leaving group emerged as the most useful combination with respect to reproducibility, stereoselectivity, and yield. A remarkable deviation from the normally observed