Visible Light Induced Bifunctional Rhodium Catalysis for Decarbonylative Coupling of Imides with Alkynes
作者:Xiang‐Ting Min、Ding‐Wei Ji、Yu‐Qing Guan、Shi‐Yu Guo、Yan‐Cheng Hu、Boshun Wan、Qing‐An Chen
DOI:10.1002/anie.202010782
日期:2021.1.18
Transition metal catalyzed decarbonylation offers a distinct synthetic strategy for new chemical bond formation. However, the π‐backbonding between CO π* orbitals and metal center d‐orbitals impedes ligand dissociation to regenerate the catalyst under mild reaction conditions. Developed here is visible light induced rhodium catalysis for decarbonylative coupling of imides with alkynes under ambient
过渡金属催化的脱羰作用为新的化学键形成提供了独特的合成策略。但是,COπ*轨道与金属中心d轨道之间的π反向键会阻碍配体解离,从而在温和的反应条件下使催化剂再生。这里开发的是在环境条件下可见光诱导的铑催化,用于酰亚胺与炔烃的脱羰偶联。最初的机理研究表明,铑络合物同时充当脱羰基的催化中心和光敏剂。这种可见光促进的催化脱羰策略为审查配体解离的旧转化提供了新的机会,这是一个决定速率的步骤。