Photoredox-Catalyzed Intermolecular Remote C–H and C–C Vinylation via Iminyl Radicals
作者:Xu Shen、Jia-Jia Zhao、Shouyun Yu
DOI:10.1021/acs.orglett.8b02540
日期:2018.9.7
C(sp3)–H and C–C vinylation of O-acyl oximes with vinyl boronic acids has been achieved. This strategy is enabled by photoreductive generation of iminyl radicals from O-acyl oximes under irradiation by visible light. The translocated carbon-centered radicals, which are generated from the iminyl radicals through 1,5-hydrogen atom transfer or C–C cleavage, can be vinylated with vinyl boronic acids. This
Ketone–Olefin Coupling of Aliphatic and Aromatic Carbonyls Catalyzed by Excited-State Acridine Radicals
作者:Nicholas J. Venditto、Yiyang S. Liang、Roukaya K. El Mokadem、David A. Nicewicz
DOI:10.1021/jacs.2c04822
日期:2022.7.6
easily reducible aromaticcarbonyl compounds. Herein, we describe a mild, metal-free ketone–olefin coupling reaction using an excited-state acridine radical super reductant as a photoredox catalyst. We demonstrate both intramolecular and intermolecular ketone–olefin couplings of aliphatic and aromaticketones and aldehydes. Mechanistic evidence is also presented supporting an “olefin first” ketone–olefin