An environmentally benign supporting electrolyte-free oxo-amination of 2H-indazole has been developed for the synthesis of symmetrical indazolylindazolones via electrochemical reduction of aerial oxygen. Simultaneously, unsymmetrical coupling products were efficiently produced by cross-dehydrogenative coupling between indazolone and 2H-indazole derivatives through electrochemical C−N bond formation.

中文翻译：

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2H-吲唑的电化学氧代胺化：对称和不对称吲唑林达唑酮的合成

开发了一种环境友好的支持无电解质的 2 H-吲唑氧代胺化，用于通过空气氧的电化学还原合成对称的吲唑基林达唑酮。同时，通过电化学CN键形成，吲唑酮和2H-吲唑衍生物之间的交叉脱氢偶联有效地产生了不对称偶联产物。