Photocatalytic C–C Bond Activation of Oxime Ester for Acyl Radical Generation and Application
作者:Xiuwei Fan、Tao Lei、Bin Chen、Chen-Ho Tung、Li-Zhu Wu
DOI:10.1021/acs.orglett.9b01338
日期:2019.6.7
strategy to generate acyl radical from oxime ester via selective C–C bond activation is reported. Under visible-light irradiation, single-electron transfer from fac-Ir(ppy)3 to related oxime takes place followed by a fast β-fragment of C–C bond to yield aryl and aliphatic acyl radicals, subsequently captured by diverse Michael acceptors. More interestingly, the single-electron transfer enables coupling
据报道,有一种通过选择性C–C键活化从肟酯生成酰基的统一策略。在可见光照射下,发生了从fac -Ir(ppy)3到相关肟的单电子转移,接着是快速的C-C键β片段产生芳基和脂族酰基基团,随后被各种Michael受体捕获。更有趣的是,单电子转移能够通过就地形成环丁烷的烯酮中间体与激发的fac -Ir(ppy)3的能量转移耦合。