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).
此外:开发了铜/ N-杂环卡宾(NHC)催化的有机硼酸酯向亚烷基氰基乙酸酯的1,4加成反应,其中催化循环被提议为由跨金属化/插入/配体交换组成。通过使用手性NHC配体也已经获得了有效的不对称变体(参见方案)。