A Simplified Protocol for the Stereospecific Nickel-Catalyzed C–S Vinylation Using NiX2 Salts and Alkyl Phosphites
作者:Austin D. Marchese、Bijan Mirabi、Egor M. Larin、Mark Lautens
DOI:10.1055/s-0039-1690717
日期:2020.1
A Ni-catalyzed C–S cross-coupling using only NiI2 (0.5–2.5 mol%) and P(OiPr)3 (2.0–10.0 mol%) is reported. Using an air-stable Ni(II) precatalyst, and a cheap and commercially available ligand, a scalable and robust method was developed to cross-couple various thiophenols and styryl bromides, including some sterically encumbered thiols, an α-bromocinnamaldehyde as well as a thiolation-cyclization.
据报道,仅使用NiI 2(0.5–2.5 mol%)和P(O i Pr)3(2.0–10.0 mol%)的Ni催化的C–S交叉偶联。使用空气稳定的Ni(II)预催化剂和便宜的市售配体,开发了一种可扩展且稳健的方法来交叉偶联各种硫酚和苯乙烯基溴化物,包括一些空间受限的硫醇,α-溴肉桂醛和硫醇化环化。
Acid/Phosphide-Induced Radical Route to Alkyl and Alkenyl Sulfides and Phosphonothioates from Sodium Arylsulfinates in Water
作者:Ya-mei Lin、Guo-ping Lu、Gui-xiang Wang、Wen-bin Yi
DOI:10.1021/acs.joc.6b02459
日期:2017.1.6
can in situ generate arylsulfenyl radicals. These radicals have high reactivity to react with alkynes, alkenes, and H-phosphine oxides for the synthesis of alkyl and alkenyl sulfides and phosphonothioates. The control experiments and quantum calculations are also performed to gain insights into the generation mechanism of arylsulfenyl radicals. Notably, the chemistry is free of thiol odors, organic solvents
Highly stereoselective anti-Markovnikov hydrothiolation of alkynes and electron-deficient alkenes by a supported Cu-NHC complex
作者:Yong Yang、Robert M. Rioux
DOI:10.1039/c4gc00642a
日期:——
A robust silica-supported Cu-NHC complex catalyzed highly stereoselective anti-Markovnikov hydrothiolation of alkynes or electron-deficient alkenes to construct C–S bonds.
Regioselective hydrothiolation of terminal acetylene catalyzed by magnetite (Fe<sub>3</sub>O<sub>4</sub>) nanoparticles
作者:Manuela S. T. Rocha、Jamal Rafique、Sumbal Saba、Juliano B. Azeredo、Davi Back、Marcelo Godoi、Antonio L. Braga
DOI:10.1080/00397911.2016.1262421
日期:2017.2.16
ABSTRACT Herein, we report a new and solvent-free methodology for the preparation of vinyl thioethers from terminal alkynes and thiols, using magnetite (Fe3O4) nanoparticles as a recyclable catalyst. With this greener method, the desired vinyl thioethers were achieved in good yields and with good stereoselectivity. In addition, the catalyst was easily recovered using a simple external magnet and reused
Stereoselective Formation of<i>Z</i>- or<i>E</i>-Vinyl Thioethers from Arylthiols and Acetylenes under Transition-Metal-Free Conditions
作者:Yunfeng Liao、Shanping Chen、Pengcheng Jiang、Hongrui Qi、Guo-Jun Deng
DOI:10.1002/ejoc.201300727
日期:2013.10
Vinyl sulfide formation with good yield and high regio- and stereoselectivities from thiols and acetylenesunder transition-metal-free conditions is described. Potassium phosphate was used as an effective additive to enhance the reaction yield and selectivity. Z-Vinyl sulfides were predominately formed in the presence of potassium phosphate, whereas E-vinyl sulfides were formed under solvent- and base-free