Photoredox-Mediated Aerobic Oxidative Cleavage of 1,3-Diketones to Access 1,2-Diketones and (<i>Z</i>)-1,4-Enediones
作者:Xiaofeng Yu、Nan Huang、Yanping Huo、Xianwei Li、Yan Liu、Keiji Maruoka、Qian Chen
DOI:10.1021/acs.orglett.3c04247
日期:2024.1.19
is disclosed. The newly developed reaction provides practical access to 1,2-diketones and (Z)-1,4-enediones in moderate to good yields with absolute regio- and stereoselectivity. Mechanistic studies of the reaction suggest that tetraketone intermediates might undergo a photocatalytic energy transfer from the excited photocatalyst to form biradical-like (n,π*) states of ketones.
公开了使用有机染料作为光催化剂在可见光照射下1,3-二酮的有氧氧化裂解。新开发的反应以中等至良好的产率和绝对的区域选择性和立体选择性提供了实际获得 1,2-二酮和 ( Z )-1,4-烯二酮的方法。该反应的机理研究表明,四酮中间体可能会经历激发光催化剂的光催化能量转移,形成酮的双自由基 (n,π*) 态。