Substrate-Directable Electron Transfer Reactions. Dramatic Rate Enhancement in the Chemoselective Reduction of Cyclic Esters Using SmI<sub>2</sub>–H<sub>2</sub>O: Mechanism, Scope, and Synthetic Utility
作者:Michal Szostak、Malcolm Spain、Kimberly A. Choquette、Robert A. Flowers、David J. Procter
DOI:10.1021/ja4078864
日期:2013.10.23
showing dramatic rate acceleration in the Sm(II)-mediated reduction of cyclic esters that is enabled by transient chelation between a directing group and the lanthanide center. This process allows unprecedented chemoselectivity in the reduction of cyclic esters using SmI2-H2O and for the first time proceeds with a broad substrate scope. Initial studies on the origin of selectivity and synthetic application