Blue Light Promoted Difluoroalkylation of Aryl Ketones: Synthesis of Quaternary Alkyl Difluorides and Tetrasubstituted Monofluoroalkenes
作者:Kangkui Li、Jingchao Chen、Chunhui Yang、Keyang Zhang、Chunxiang Pan、Baomin Fan
DOI:10.1021/acs.orglett.0c01294
日期:2020.6.5
cost-effective method for the preparation of fluoroalkylated compounds has been described by the direct photoexcitation of halofluoroalkanes with blue light absorptivity, enabling the difluoroalkylation of arylketones. The methodology has provided an efficient, mild, and catalyst-free synthetic method for quaternary difluoroalkylated arenes and tetrasubstituted monofluoroalkenes.
Highly stereoselective nickel-catalyzed difluoroalkylation of aryl ketones to tetrasubstituted monofluoroalkenes and quaternary alkyl difluorides
作者:Chao Li、Yi-Xuan Cao、Ruo-Xing Jin、Kang-Jie Bian、Zi-Yang Qin、Quan Lan、Xi-Sheng Wang
DOI:10.1039/c9sc02806d
日期:——
stereo-defined tetrasubstituted monofluoroalkenes or quaternary alkyl difluorides from secondary or tertiary ketones, respectively, has been established. Mechanistic investigations indicated that these C-H fluoroalkylations proceed via a Ni(i)/Ni(iii) catalytic cycle. An obvious fluorine effect was observed in the reaction, and this reaction has demonstrated high stereoselectivity, mild conditions, and broad