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
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.
The present invention is for compounds having the formula of N-1H-tetrazol-5-yl-2-thiophenecarboxamides, N-1H-tetrazol-5-yl-2-pyrrolecarboxamides, N-1H-tetrazol-5-yl-2-furancarboxamides or analogs of each of the carboxamides. The compounds are useful for the treatment of allergic or inflammatory conditions or diseases. Thus, pharmaceutical compositions and methods of use are also the invention. Processes of preparation for the compounds are also the invention.
Assembly of (hetero)aryl thioethers <i>via</i> simple nucleophilic aromatic substitution and Cu-catalyzed coupling reactions with (hetero)aryl chlorides and bromides under mild conditions
作者:Weiqi Liu、Xinghao Jin、Dawei Ma
DOI:10.1039/d3gc02066e
日期:——
requirement of higher reaction temperatures for an SNAr reaction between thiols and less reactive electron-poor aryl halides described in earlier reports has triggered intensive studies on the development of metal- and photo-catalyzed methods to promote this transformation. We report here that an SNAr reaction of thiols with most electron-poor aryl halides takes place at RT–60 °C under the action of
早期报道中描述的硫醇和反应性较低的缺电子芳基卤化物之间的S N Ar 反应需要更高的反应温度,这引发了对开发金属和光催化方法以促进这种转变的深入研究。我们在此报告,在 K 2 CO 3和 DMAc的作用下,硫醇与大多数缺电子芳基卤化物在 RT–60 °C 下发生S N Ar 反应。在这种温和的条件下,碱和溶剂都起着至关重要的作用。对于对 S N不发生反应的(杂)芳基卤化物Ar反应中,鉴定出两种更强大的草酸二酰胺配体,使其Cu催化的偶联反应能够在低催化负载量下进行。这两种方法的结合为制备(杂)芳基硫醚提供了一种非常有吸引力的方法。
N-1H-Tetrazol-5-yl-(5-Ring)-carboxamide-derivatives, a process for their manufacture, and the use thereof