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
Electrochemically Promoted Nickel-Catalyzed Carbon–Sulfur Bond Formation
作者:Yang Wang、Lingling Deng、Xiaochen Wang、Zhengguang Wu、Yi Wang、Yi Pan
DOI:10.1021/acscatal.8b04633
日期:2019.3.1
This work describes a nickel-catalyzed Ullmann-type thiolation of aryl iodidesunder mild electrochemical conditions. The simple undivided cell with graphene/nickel foam electrode setups offers excellent substrate tolerance, affording aryl and alkyl sulfides in good chemical yields. Furthermore, the mechanism for this electrochemical cross-coupling reaction has been investigated by cyclic voltammetry
Direct C-S bond coupling is an attractive way to construct aryl sulfur ether, a building block for a variety of biological active molecules. Herein, we disclose an effective model for regioselective thiolation of the aromatic C-Hbond by thiolactivation instead of arene activation. Strikingly, this method has been applied into anisole derivatives that are not available in the arene activation approach
Simple N-Heterocyclic Carbenes as Ligands in Ullmann-Type Ether and Thioether Formations
作者:Jiang-Ping Wu、Anjan K. Saha、Nizar Haddad、Carl A. Busacca、Jon C. Lorenz、Heewon Lee、Chris H. Senanayake
DOI:10.1002/adsc.201600316
日期:2016.6.16
A simple N‐heterocyclic carbene (NHC) derived from 1‐methyl‐3‐ethylimidazolium tetrafluoroborate was found to be an efficient ligand for a range of copper‐catalyzed cross‐coupling reactions, leading to the formation of aromatic ethers and thioethers.
Ni-catalyzed C–S bond cleavage of aryl 2-pyridyl thioethers coupling with alkyl and aryl thiols
作者:Cheng-Yi Wang、Rui Tian、Yong-Ming Zhu
DOI:10.1016/j.tet.2021.132453
日期:2021.10
A nickel-catalyzed C–SPy bond activation reactions to produce a variety of thioethers has been developed. The reaction is promoted by a user-friendly, inexpensive, air and moisture-stable Ni precatalyst. Various aryl 2-pyridyl thioethers and a wide range of alkyl and aryl thiols substrates were tolerated in this process which afforded products in moderate to excellent yields.