α-Ketophosphonates as Ester Surrogates: Isothiourea-Catalyzed Asymmetric Diester and Lactone Synthesis
作者:Siobhan R. Smith、Stuart M. Leckie、Reuben Holmes、James Douglas、Charlene Fallan、Peter Shapland、David Pryde、Alexandra M. Z. Slawin、Andrew D. Smith
DOI:10.1021/ol500873s
日期:2014.5.2
Isothiourea HBTM-2.1 catalyzes the asymmetric Michael addition/lactonization of aryl- and alkenylacetic acids using alpha-keto-beta,gamma-unsaturated phosphonates as alpha,beta-unsaturated ester surrogates, giving access to a diverse range of stereodefined lactones or enantioenriched functionalized diesters upon ring-opening.