S-烷基,S-芳基和S-乙烯基硫代硫酸钠盐(Bunte盐)与Grignard试剂反应生成硫化物,收率很高。S-烷基邦特盐是由无味的硫代硫酸钠通过与烷基卤化物的S N 2反应制备的。开发了铜催化的硫代硫酸钠与芳基卤化物和乙烯基卤化物的偶联物,以得到S-芳基和S-乙烯基丁烯酸盐。该反应适合于多种结构的邦特盐和格氏试剂。重要的是,这种硫化物的途径避免了使用恶臭的硫醇原料或副产物。
Nickel‐Catalyzed Thiolation of Aryl Halides and Heteroaryl Halides through Electrochemistry
作者:Dong Liu、Hong‐Xing Ma、Ping Fang、Tian‐Sheng Mei
DOI:10.1002/anie.201900956
日期:2019.4
Transition‐metal‐catalyzed coupling reactions are useful tools for synthesizing aryl sulfur compounds. However, conventional transition‐metal‐catalyzed thiolation of aryl bromides and chlorides typically requires the use of strong base under elevated reaction temperature. Herein, we report the first examples of nickel‐catalyzed electrochemical thiolation of aryl bromides and chlorides in the absence
Forging C−S(Se) Bonds by Nickel‐catalyzed Decarbonylation of Carboxylic Acid and Cleavage of Aryl Dichalcogenides
作者:Jing‐Ya Zhou、Yong‐Ming Zhu
DOI:10.1002/ejoc.202100115
日期:2021.5.7
A practical protocol is developed for the one‐pot construction of C−S(Se) bonds through nickel‐catalyzed decarbonylation of carboxylic acid and aryl dichalcogenides. This approach featured broad substrate scope and good functional group tolerance.
A mild, scalable iodine-mediated oxidative cross-coupling reaction of arylhydrazines and thiols for construction of thioethers (sulfides) in the absence of any transition metals or photocatalysts is disclosed. A variety of unsymmetrical diaryl sulfides with broad substrate scope both on thiols and hydrazines were synthesized in high yields in water at room temperature. Furthermore, to demonstrate the
Nickel-Catalyzed C−S Bond Formation via Decarbonylative Thioetherification of Esters, Amides and Intramolecular Recombination Fragment Coupling of Thioesters
A nickelcatalyzed cross‐coupling protocol for the straightforward C−Sbond formation has been developed. Various mercaptans and a wide range of ester and amide substrates bearing various substituents were tolerated in this process which afforded products in good to excellent yields. Furthermore, an intramolecular protocol for the synthesis of thioethers starting from thioesters has been developed
Electrochemical Thiolation and Borylation of Arylazo Sulfones with Thiols and B
<sub>2</sub>
pin
<sub>2</sub>
作者:Rongkang Wang、Fangming Chen、Lvqi Jiang、Wenbin Yi
DOI:10.1002/adsc.202001518
日期:2021.3.29
arylazo sulfones were used as radical precursors for carbon‐heteroatom bond formation under electrochemical conditions. Moreover, the scalability of this approach was evaluated by performing the electrochemical thiolation and borylation of arylazo sulfones with thiols and B2pin2 on a gram scale. This protocol not only avoided the use of stoichiometric oxidants, metal catalysts, activating agents and