Facile difluoromethylation of aliphatic alcohols with an <i>S</i>-(difluoro-methyl)sulfonium salt: reaction, scope and mechanistic study
作者:Guo-Kai Liu、Xin Li、Wen-Bing Qin、Xiao-Shui Peng、Henry N. C. Wong、Linxing Zhang、Xinhao Zhang
DOI:10.1039/c9cc03487k
日期:——
difluoromethylation of aliphatic alcohols with an S-(difluoromethyl)sulfonium salt was developed. A wide variety of alcohols with broad functional groups are compatible to furnish the corresponding alkyl difluoromethyl ethers in good to excellent yields under mild reaction conditions. Control experiments and DFT computational studies suggest that the difluoromethylation of alcohols mainly proceeds via a difluorocarbene
Direct Difluoromethylation of Alcohols with an Electrophilic Difluoromethylated Sulfonium Ylide
作者:Jiansheng Zhu、Yafei Liu、Qilong Shen
DOI:10.1002/anie.201603166
日期:2016.7.25
mild reaction conditions and with good functional‐group tolerance was developed. The development of the method was based on the invention of a stable, electrophilic, difluoromethylating reagent, difluoromethyl‐(4‐nitrophenyl)‐bis(carbomethoxy) methylide sulfonium ylide, which was synthesized by reaction of the easily available 4‐nitrophenyl (difluoromethyl)thioether and dimethyl diazomalonate in the