Direct Activation of β-sp<sup>3</sup>-Carbons of Saturated Carboxylic Esters as Electrophilic Carbons via Oxidative Carbene Catalysis
作者:Bin Liu、Weihong Wang、Ruoyan Huang、Jiekuan Yan、Jichang Wu、Wei Xue、Song Yang、Zhichao Jin、Yonggui Robin Chi
DOI:10.1021/acs.orglett.7b03650
日期:2018.1.5
An N-heterocyclic carbene-catalyzed oxidative LUMO activation of the β-cabons of saturated carboxylic esters is disclosed. This approach allows for efficient asymmetric access to lactams and lactones by directly installing functional groups to the typically inert β-sp3 carbons of saturated esters. The use of HOBt as an additive was found to significantly improve both yields and enantioselectivities
公开了一种N-杂环卡宾催化的饱和羧酸酯的β-碳的氧化LUMO活化。该方法允许通过直接安装的官能团的典型惰性β-SP高效不对称获得内酰胺和内酯3个饱和酯的碳。发现使用HOBt作为添加剂可显着提高反应的产率和对映选择性。