A copper catalyzed three-component reaction was developed for the synthesis of benzothiazolones. In the presence of CuBr2, the reaction of o-iodoanilines and K2S with DMF proceeded smoothly and generated the corresponding benzothiazolones with good isolated yields. DMF functioned both as the carbon monoxide source and as the reaction medium in this reaction.
A facile access to benzo[d]thiazole-2(3H)-thiones and benzo[d]thiazol-2(3H)-ones has been developed through a temperature-controlled intermolecular [3 + 2] annulation of N,N-disubstituted arylhydrazines with CS2 in the presence of DMSO. This protocol can obviate the prefunctionalization of the starting materials. This direct C–S/C–N bond formation reaction was performed in the absence of any external
通过温度控制的 N,N 分子间 [3 + 2] 环化,开发了一种容易获得苯并[ d ]噻唑-2(3 H )-硫酮和苯并[ d ]噻唑-2(3 H )-酮的方法-在DMSO存在下用CS 2二取代的芳基肼。该协议可以避免起始材料的预功能化。这种直接的 C-S/C-N 键形成反应是在没有任何外部催化剂、过渡金属、碱、配体和氧化剂的情况下进行的,具有高步骤经济性。
Cobalt‐Catalyzed Hydrolysis/C−H Thiolation Cascade Reaction of
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‐Aryl Thiocarbamoyl Fluorides with Water: Access to 3‐Alkyl‐2(3H)‐Benzothiazolones
作者:Miao Yu、Long Zhen、Liqin Jiang
DOI:10.1002/adsc.202200426
日期:2022.10.18
A cobalt-catalyzed cascadereaction of N-aryl thiocarbamoylfluorides and water has been developed, providing access to 3-alkyl-2(3H)-benzothiazolones in 48–83% yields. This protocol for 3-alkyl-2(3H)-benzothiazolones precludes bad-smell and toxic reagents. Mechanistic studies suggest that the transformation proceeds through hydrolysis followed by dehydrogenative coupling to form C−S bond involving