Laccase-catalyzed, aerobic oxidative coupling of 4-substituted urazoles with sodium arylsulfinates: Green and mild procedure for the synthesis of arylsulfonyl triazolidinediones
摘要:
The direct aerobic oxidation of 4-substituted urazoles using the laccase enzyme from Trametes versicolor in a phosphate buffer solution at ambient temperature, and subsequent cross-coupling with sodium benzenesulfinates was investigated to afford arylsulfonyl-1,2,4-triazolidine-3,5-dione derivatives in good to high yields. (C) 2017 Elsevier Ltd. All rights reserved.
Electrochemical oxidation of 4-substituted urazoles in the presence of arylsulfinic acids: an efficient method for the synthesis of new sulfonamide derivatives
Electrochemical synthesis of some new sulfonamide derivatives was carried out via the electrooxidation of 4-substituted urazoles in the presence of arylsulfinic acids. The results show that electrogenerated 4-alkyl-4H-1,2,4-triazole-3,5-diones participated in a Michael-type reaction with arylsulfinic acids and, via an “electron transfer + chemical reaction” (EC) mechanism, were converted to the corresponding
电化学合成的一些新方法 磺酰胺在芳基亚磺酸的存在下,通过4-取代的脲唑的电氧化反应进行衍生物。结果表明,电生成的4-烷基-4 H -1,2,4-三唑-3,5-二酮参与了与芳基亚磺酸的迈克尔型反应,并通过“电子转移+化学反应”(EC)机理,分别转换为相应的磺酰胺衍生品。在这项工作中,一些新的磺酰胺 水溶液中高收率的衍生物,无毒试剂和 溶剂 提供了一种使用环保的新颖方法的碳电极的制造方法。