A one-step preparation method for indenone and quinone derivatives via rhodium-mediated [5 + 2 − 2] and [5 + 2 − 1] decarbonylative cycloadditions of 1H-indene-1,2,3-triones and alkynes has been achieved. A rhodium(I) complex, [Rh(COD)Cl]₂, with a bisphosphine rac-BINAP ligand was the most efficient catalytic system for this decarbonylative cycloaddition transformation. The [5 + 2 − 2] and [5 + 2 − 1] transformation processes can be enhanced by respectively adding copper chloride or hexacarbonyl chromium as an additive. This reaction is suitable for a broad range of alkynes and 1H-indene-1,2,3-triones and a variety of fused indenone and quinone derivatives were obtained in medium to high yields. More importantly, this work provides a new model for the direct activation of C–C bonds in less strained ketones without auxiliary groups.

中文翻译：

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铑通过直接C–C键活化催化1 H-茚-1,2,3-三酮和炔烃的脱羰环加成反应：茚满和醌的发散合成†

通过铑介导的1 H-茚-1,2,3-三酮和炔烃的[5 + 2-2 ]和[5 + 2-1 ]脱羰环加成反应，一步制备茚满酮和醌衍生物的方法。具有双膦rac -BINAP配体的铑（I）配合物[Rh（COD）Cl] ₂是该脱羰基环加成转化的最有效催化体系。通过分别添加氯化铜或六羰基铬作为添加剂，可以增强[5 + 2-2]和[5 + 2-1]转化过程。该反应适用于各种炔烃和1 H以中等至高收率获得了1-茚-1,2,3-三酮和各种稠合的茚满酮和醌衍生物。更重要的是，这项工作为在没有辅助基团的情况下，在应变较小的酮中直接激活C-C键提供了新模型。