Cu-Catalyzed Couplings of Aryl Iodonium Salts with Sodium Trifluoromethanesulfinate
作者:Steven C. Cullen、Shashank Shekhar、Nandkishor K. Nere
DOI:10.1021/jo401868x
日期:2013.12.6
A convenient method for the preparation of aryl trifluoromethylsulfones from the reactions of diaryliodonium salts with sodium trifluoromethanesulfinate in the presence of copper catalysts is described. Cuprous oxide in DMF was found to be the optimal catalyst for the reaction. The reaction conditions are tolerant of various functional groups as well as of various counteranions of the iodonium salt
Copper-Promoted Trifluoromethanesulfonylation and Trifluoromethylation of Arenediazonium Tetrafluoroborates with NaSO<sub>2</sub>CF<sub>3</sub>
作者:Ke Zhang、Xiu-Hua Xu、Feng-Ling Qing
DOI:10.1021/acs.joc.5b01295
日期:2015.8.7
A tunable chemoselective trifluoromethanesulfonylation and trifluoromethylation of arenediazonium tetrafluoroborates with Langlois' reagent (NaSO2CF3) was developed. The Cu2O-catalyzed reaction in DMSO gave aryl trifluoromethanesulfones as the major products. On the other hand, the trifluoromethylated arenes were produced in the presence of oxidant tert-butyl hydroperoxide, CuBF4(MeCN)(4), and 2,2';6',2 ''-terpyridine (tpy). Both of these transformations proceed under mild conditions and tolerate functional groups.