An Efficient Synthesis of 2-Bromo-3-hydroxy Esters by Reaction of Ketones with Ethyl Dibromoacetate Promoted by Samarium Diiodide
作者:José M. Concellón、Carmen Concellón、Pamela Diaz
DOI:10.1002/ejoc.200500940
日期:2006.5
A simple and efficient samarium diiodide mediated synthesis of 2-bromo-3-hydroxy esters 1 by the reaction of a variety of ketones 2 with ethyl dibromoacetate (3) is described. The relative configuration of the major diastereoisomer obtained was established by NOESY experiments of the corresponding α,β-epoxy esters 4 prepared from 1. Additionally, a mechanism is proposed to explain the results obtained