1464776-39-3Relevant articles and documents
Cu-promoted oxidative trifluoromethylation of terminal alkynes with difluoromethylene phosphobetaine
Deng, Xiaoyun,Lin, Jinhong,Zheng, Jian,Xiao, Jichang
, p. 689 - 693 (2014/10/15)
Difluoromethylene phosphobetaine (Ph3P+CF 2CO2-, PDFA), a known difluorocarbene reagent, was found to be able to efficiently trifluoromethylate terminal alkynes in the presence of Cu(I) and potassium fluoride. The transformation proceeded smoothly to afford the corresponding trifluoromethylated acetylenes in moderate yields. A difluorocarbene precursor, difluoromethylene phosphobetaine (Ph 3P+CF2CO2-, PDFA) was found to be able to act as a trifluoromethylating reagent in the presence of fluoride. The oxidative trifluoromethylation of terminal alkynes with PDFA promoted by Cu(I) occurred smoothly to give the corresponding trifluoromethylated acetylenes in moderate yields. Copyright