Copper chalcogenide nanoparticles (Cu₇S₄) supported on graphene oxide (GO) have been synthesized for the first time from Cu₂S, and used as highly efficient heterogeneous catalysts for oxidative ortho-selective C–H aminomethylation of phenols with N,N-dimethylbenzylamines. The NPs (30–80 nm) have been characterized by HRTEM, SEM-EDX, PXRD, FTIR, Raman, ICP-AES and XPS analyses. The NP catalyzed sp²–sp³ cross dehydrogenative coupling (CDC) features a broad substrate scope, excellent functional group tolerance, high yields, use of an inexpensive and reusable copper catalyst, mild conditions, and no need for pre-functionalization of substrates.

中文翻译：

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GO–Cu ₇ S ₄催化苯酚衍生物与N，N-二甲基苄胺的邻氨基甲基化：选择性氧化CDC †

首次由Cu ₂ S合成了负载在氧化石墨烯（GO）上的硫化铜铜纳米颗粒（Cu ₇ S ₄），并用作高效的非均相催化剂，用于酚与N，N的氧化邻位选择性C–H氨基甲基化-二甲基苄胺。NP（30–80 nm）已通过HRTEM，SEM-EDX，PXRD，FTIR，拉曼，ICP-AES和XPS分析进行了表征。NP催化的sp ² –sp ³ 交叉脱氢偶联（CDC）具有广泛的底物范围，优异的官能团耐受性，高收率，使用廉价且可重复使用的铜催化剂，温和的条件以及无需对底物进行预功能化。