<i>N</i>-Difluoromethylthiophthalimide: A Shelf-Stable, Electrophilic Reagent for Difluoromethylthiolation
作者:Dianhu Zhu、Yang Gu、Long Lu、Qilong Shen
DOI:10.1021/jacs.5b03170
日期:2015.8.26
A new, electrophilic difluoromethylthiolating reagent N-difluoromethylthiophthalimide 3 was developed. Reagent 3 can be readily synthesized in four steps from easily available starting materials phthalimide and TMSCF2H. N-difluoromethylthiophthalimide 3 is a powerful electrophilic difluoromethylthiolating reagent that allows the difluoromethylthiolation of a wide range of nucleophiles including aryl/vinyl
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
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.