Difluoromethylation of Phenols and Thiophenols with the <i>S</i>-(Difluo-romethyl)sulfonium Salt: Reaction, Scope, and Mechanistic Study
作者:Guo-Kai Liu、Wen-Bing Qin、Xin Li、Li-Ting Lin、Henry N. C. Wong
DOI:10.1021/acs.joc.9b02424
日期:2019.12.20
A facile and practical approach for the difluoromethylation of phenols and thiophenols was described. Making use of the recently developed bench-stable S-(difluoromethyl)sulfonium salt as the difluorocarbene precursor, a wide variety of diversely functionalized phenols and thiophenols were readily converted to their corresponding aryl difluoromethyl ethers in good to excellent yields in the presence
描述了一种用于苯酚和硫酚的二氟甲基化的简便实用方法。利用最近开发的稳定的S-(二氟甲基)ulf盐作为二氟卡宾的前体,在氢氧化锂的存在下,很容易将各种不同官能化的苯酚和硫酚以良好或优异的收率转化为其相应的芳基二氟甲基醚。 。系统地研究了各种O,S-亲核试剂对二氟卡宾的化学选择性,表明反应顺序为ArS-> RS-,ArO-> ROH> RO-,ArSH,ArOH,RSH。