Novel Base-Free Catalytic Wittig Reaction for the Synthesis of Highly Functionalized Alkenes
作者:Marie-Luis Schirmer、Sven Adomeit、Anke Spannenberg、Thomas Werner
DOI:10.1002/chem.201503744
日期:2016.2.12
base‐free catalytic Wittigreactions has been developed and optimized. Initially, several potential (pre)catalysts as well as different silanes as reducing agents were screened. A system based on a readily available phosphine oxide as precatalyst and trimethoxy silane as reducing agent proved to be optimal. The effect of various Brønsted acidic additives was studied. Subsequently, the reaction conditions were