Asymmetric Coupling of Carbon‐Centered Radicals Adjacent to Nitrogen: Copper‐Catalyzed Cyanation and Etherification of Enamides
作者:Guoyu Zhang、Song Zhou、Liang Fu、Pinhong Chen、Yibiao Li、Jianping Zou、Guosheng Liu
DOI:10.1002/anie.202008338
日期:2020.11.9
The first copper‐catalyzed asymmetric cyanation and etherification reactions of enamides have been established, where a carbon‐centered radical adjacent to a nitrogen atom (CRAN) is enantioselectively trapped by a chiral copper(II) species. Moreover, the asymmetric cyanation of vinyl esters was disclosed as well. These reactions feature very mild reaction conditions and high functional group tolerance
已经建立了第一个铜催化的酰胺类不对称氰化和醚化反应,其中与氮原子(CRAN)相邻的碳中心自由基被手性铜(II)物种对映选择性地捕获。此外,还公开了乙烯基酯的不对称氰化。这些反应具有非常温和的反应条件和较高的官能团耐受性,并提供了一系列手性的α-氰基酰胺,α-氰基酯和α-半胱氨酸,收率高,对映选择性优异。手性α-氰基酰胺很容易转化为对映体富集的1,2-二胺和氨基酸。