Copper-Catalyzed 1,4-Addition of Organoboronates to Alkylidene Cyanoacetates: Mechanistic Insight and Application to Asymmetric Catalysis
作者:Keishi Takatsu、Ryo Shintani、Tamio Hayashi
DOI:10.1002/anie.201008196
日期:2011.6.6
In addition: A copper/N‐heterocyclic carbene(NHC)‐catalyzed 1,4‐addition of organoboronates to alkylidene cyanoacetates was developed, in which the catalytic cycle is proposed to consist of a transmetalation/insertion/ligand exchange. An effective asymmetric variant has also been achieved by the use of a chiral NHC ligand (see scheme).