Visible-Light-Mediated Synthesis of Unsymmetrical Diaryl Sulfides via Oxidative Coupling of Arylhydrazine with Thiol
作者:Golam Kibriya、Susmita Mondal、Alakananda Hajra
DOI:10.1021/acs.orglett.8b03549
日期:2018.12.7
A metal-free visible-light-promoted oxidative coupling between thiols and arylhydrazines has been developed to afford diaryl sulfides using a catalytic amount of rose bengal as photocatalyst under aerobic conditions. A library of unsymmetrical diaryl sulfides with broad functionalities was synthesized in good yields at room temperature. The present methodology is also applicable to benzo[ d]thiazole-2-thiols
Catalytic Selenium-Promoted Intermolecular Friedel–Crafts Alkylation with Simple Alkenes
作者:E Tang、Yinjiao Zhao、Wen Li、Weilin Wang、Meng Zhang、Xin Dai
DOI:10.1021/acs.orglett.5b03579
日期:2016.3.4
A method for conducting selenium-promoted intermolecular Friedel–Crafts (F–C) alkylation reactions has been developed with simple alkenes using trimethylsilyl trifluoromethanesulfonate as a catalyst and N-phenylselenophthalimide as an efficient selenium source. Electron-rich arenes smoothly underwent F–C alkylation with a variety of alkenes to afford alkylated products in good yield and with high regioselectivity
Copper nano-catalyst: sustainable phenyl-selenylation of aryl iodides and vinyl bromides in water under ligand free conditions
作者:Amit Saha、Debasree Saha、Brindaban C. Ranu
DOI:10.1039/b819137a
日期:——
A simple and efficient procedure for the synthesis of aryl- and vinyl-selenides has been developed by a copper nanoparticle catalysed reaction of aryl iodide/vinyl bromide with diphenyl diselenide in the presence of zinc in water. (E)-Vinyl bromides produce (E)-vinyl selenides stereoselectively, whereas (Z)-vinyl bromides provide mixtures of (E) and (Z) isomers. The catalyst was recycled.
A Simple Copper Salt-Catalyzed Synthesis of Unsymmetrical Diaryl Selenides and Tellurides from Arylboronic Acids with Diphenyl Diselenide and Ditelluride
作者:Lei Wang、Min Wang、Fuping Huang
DOI:10.1055/s-2005-871936
日期:——
In the presence of a catalytic amount of simple copper salt, the reaction of arylboronic acids with diphenyl diselenide and ditelluride was accomplished without any additive to afford the corresponding unsymmetrical diarylselenides and tellurides in good yields.
Lewis acid InBr3-catalyzed arylation of diorgano diselenides and ditellurides with arylboronic acids
作者:Kai Ren、Min Wang、Lei Wang
DOI:10.1039/b914533h
日期:——
A novel Lewis acid InBr3-catalyzed direct cross-coupling reaction of arylboronic acids with diorgano diselenides and ditellurides without any additive has been developed. The reactions generated the corresponding unsymmetrical diorgano monoselenides and monotellurides in good to excellent yields. The method has advantages of broad substrate scope, simple operation, mild reaction conditions and high effectiveness. A possible reaction mechanism was proposed.