Copper-Promoted Sandmeyer Difluoromethylthiolation of Aryl and Heteroaryl Diazonium Salts
作者:Jiang Wu、Yang Gu、Xuebing Leng、Qilong Shen
DOI:10.1002/anie.201502113
日期:2015.6.22
An efficient copper‐promoted difluoromethylthiolation of aryl and heteroaryldiazoniumsalts is described. The reaction is conducted under mild reaction conditions and various functional groups were compatible. In addition, reactions of heteroaryldiazoniumsalts such as pyridyl, quinolinyl, benzothiazolyl, thiophenyl, carbazolyl, and pyrazolyl diazoniumsalts occurred smoothly to afford the medicinally
Pd-Catalyzed Difluoromethylthiolation of Aryl Chlorides, Bromides and Triflates
作者:Jiang Wu、Changhui Lu、Long Lu、Qilong Shen
DOI:10.1002/cjoc.201800306
日期:2018.11
A highly efficient Pd‐catalyzed difluoromethylthiolation of aryl chlorides, bromides and triflates is described. A variety of arylhalides with common functional groups were difluoromethylthiolated in moderate to excellent yields. Furthermore, several natural, drug and material molecules containing an aryl chloride, bromide, and phenol unit were successfully difluoromethylthiolated, thus providing
A new shelf‐stable and easily scalable difluoromethylthiolating reagent S‐(difluoromethyl) benzenesulfonothioate (PhSO2SCF2H) was developed. PhSO2SCF2H is a powerful reagent for radical difluoromethylthiolation of aryl and alkyl boronic acids, decarboxylative difluoromethylthiolation of aliphatic acids, and a phenylsulfonyl‐difluoromethylthio difunctionalization of alkenes under mild reaction conditions
A Route to α-Fluoroalkyl Sulfides from α-Fluorodiaroylmethanes
作者:Ya-mei Lin、Wen-bin Yi、Wan-zhao Shen、Guo-ping Lu
DOI:10.1021/acs.orglett.5b03654
日期:2016.2.5
alpha,alpha-Difluorodiaroylmethane can be used as a nucleophilic difluoromethylation reagent for generating alpha-thioaryl-alpha,alpha-difluoroacetophenones ((ArCOCF2SAr)-C-1) and difluoromethylthiolated arenes (ArSCF2H) under transition-metal-free conditions. The reaction selectivity is mainly dependent on temperature. The method has also been extended to the synthesis of alpha-thioaryl-alpha-monofluoroacetophenones using alpha-monofluorodibenzoylmethane. Moreover, the benzoyl cation derived from alpha,alpha-difluorodibenzoylmethane can react with nucleophiles to afford the desired products in a one-pot process.