title: Visible-light-initiated difluoromethylation of arene diazonium tetrafluoroborates.
abstract: A mild and efficient method for the radical addition of α-aryl-β,β-difluoroenol silyl with arene diazonium tetrafluoroborates at room temperature has been disclosed, which involves an innate radical long chain cycle, so only a small amount (0.05 mol%) of photocatalyst and a short light exposure time are required as radical initiators. A proposed mechanism for the transformation is also illustrated based on the results of control experiments and quantum calculations. A variety of α-aryl-α,α-difluoroketones were formed in moderate to high yields, and can be easily further transformed into various difluoromethylarenes under basic conditions.
authors.affiliation: Chemical Engineering College, Nanjing University of Science and Technology, 200 Xiao Ling Wei Street, Nanjing, Jiangsu, People's Republic of China. c.cai@njust.edu.cn glu@njust.edu.cn.
authors.forename: Ye-bin
authors.initials: YB
authors.lastname: Wu
authors.forename: Guo-ping
authors.initials: GP
authors.lastname: Lu
authors.forename: Bao-jing
authors.initials: BJ
authors.lastname: Zhou
authors.forename: Mei-jie
authors.initials: MJ
authors.lastname: Bu
authors.forename: Li
authors.initials: L
authors.lastname: Wan
authors.forename: Chun
authors.initials: C
authors.lastname: Cai