A copper-catalyzed, ligand- and base-free C–N cross-coupling reaction of iminochromenes with arylboronic acids in a nontoxic ethanol solvent at room temperature under air is developed. The product yields are found to be good to moderate. The conservation of the sensitive imine functional group implies the mildness of this protocol

中文翻译：

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在有氧条件下铜催化亚氨基 C-N 键与芳基硼酸的形成

开发了一种铜催化的、无配体和无碱的 C-N 交叉偶联反应，即在室温下，在无毒乙醇溶剂中，亚氨基色烯与芳基硼酸在空气中的反应。发现产品产率良好至中等。敏感亚胺官能团的保守性意味着该协议的温和性