We report here cobalt−N-heterocyclic carbene catalytic systems for the intramolecular decarbonylative coupling through the chelation-assisted C−C bond cleavage of acylindoles and diarylketones. The reaction tolerates a wide range of functional groups such as alkyl, aryl, and heteroaryl groups, giving the decarbonylative products in moderate to excellent yields. This transformation involves the cleavage of two C−C bonds and formation of new C−C bond without the use of noble metals, thus reinforcing the potential application of decarbonylation as an effective tool for C−C bond formation.

中文翻译：

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通过C-C键断裂的钴催化的酰基吲哚和二芳基酮的分子内脱羰偶联

我们在此报告钴-N-杂环卡宾催化体系，用于通过丙烯酰胺和二芳基酮的螯合辅助CC键裂解进行分子内脱羰偶联。该反应可耐受各种官能团，例如烷基，芳基和杂芳基，从而以中等至极好的收率得到脱羰基产物。这种转变涉及两个CC键的裂解和不使用贵金属的新CC键的形成，从而增强了脱羰作用作为CC键形成的有效工具的潜在应用。