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。
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
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.
Room temperature nickel-catalyzed cross-coupling of aryl-boronic acids with thiophenols: synthesis of diarylsulfides
作者:Amit Bhowmik、Mahesh Yadav、Rodney A. Fernandes
DOI:10.1039/d0ob00244e
日期:——
been developed for the synthesis of symmetric and unsymmetric diarylsulfides at room temperature and in air. This methodology is reliable and offers a mild and easy to operate process for the synthesis of arylthioethers, which are essential compounds with applications in the pharmaceutical and agricultural industries. This method avoids the use of expensive transitionmetals, such as Pd, Ir or Rh,
sulfenylation/deiodination/aromatization of cyclic alkenyl iodides with sulfonyl hydrazides. In the absence of external catalysts and additives a range of 4‐iodo‐1,2‐dihydronaphthalenes reacted with sulfonyl hydrazides to give structurally diverse 2‐naphthyl thioethers in good yields. Mechanistic studies showed that at an early stage sulfonyl hydrazides decomposed completely to thiosulfonates and disulfides