Chemoselective synthesis of diaryl disulfides via a visible light-mediated coupling of arenediazonium tetrafluoroborates and CS<sub>2</sub>
作者:Jing Leng、Shi-Meng Wang、Hua-Li Qin
DOI:10.3762/bjoc.13.91
日期:——
A highly efficient and chemoselective method for the synthesis of diaryl disulfides is developed via a visible light-promoted coupling of readily accessible arenediazonium tetrafluoroborates and CS2. This practical and convenient protocol provides a direct pathway for the assembly of a series of disulfides in an environmentally friendly manner with good to excellent yields.
Nanolayered cobalt–molybdenum sulphides (Co–Mo–S) catalyse borrowing hydrogen C–S bond formation reactions of thiols or H<sub>2</sub>S with alcohols
作者:Iván Sorribes、Avelino Corma
DOI:10.1039/c8sc05782f
日期:——
Nanolayered cobalt–molybdenum sulphide (Co–Mo–S) materials have been established as excellent catalysts for C–S bond construction. These catalysts allow for the preparation of a broad range of thioethers in good to excellent yields from structurally diverse thiols and readily available primary as well as secondary alcohols. Chemoselectivity in the presence of sensitive groups such as double bonds,
Synthesis of aryl cyclopropyl sulfides through copper-promoted S-cyclopropylation of thiophenols using cyclopropylboronic acid
作者:Emeline Benoit、Ahmed Fnaiche、Alexandre Gagnon
DOI:10.3762/bjoc.15.113
日期:——
operates under simple conditions to afford the corresponding arylcyclopropyl sulfides in moderate to excellent yields. The reaction tolerates substitution in ortho-, meta- and para-substitution as well as electron-donating and electron-withdrawing groups. The S-cyclopropylation of a thiophenol was also accomplished using potassium cyclopropyl trifluoroborate.
Catalyst-free <i>gem</i>-chlorosulfurization of difluoromethyl-substituted diazo compounds with disulfide and PhICl<sub>2</sub>
作者:Jiuling Li、Bin Li、Juan Chen、Xinyu Jia、Min Wang、Chengjun Hao、Xinhua Zheng、Hongmei Dai、Wenhao Hu
DOI:10.1039/d1ob01422f
日期:——
A series of gem-chlorosulfurization products bearing difluoromethyl substituents were synthesized from TsCF2CHN2, disulfides and PhICl2 under mild conditions, which could be efficiently converted to multi-component products by a facile operation.
Iodine-promoted stereoselective amidosulfenylation of electron-deficient alkynes
作者:Fuhong Xiao、Dahan Wang、Shanshan Yuan、Huawen Huang、Guo-Jun Deng
DOI:10.1039/c8ra04374d
日期:——
Iodine-promoted three-component synthesis of substituted β-amino sulfides has been developed starting from a propargyl ester, aliphatic secondary amine, and disulfide. This protocol provides a step-economic and highlyregioselective entry to trisubstituted olefins with good substrate scope and functional group tolerance.