A novel rhodium(III)‐catalyzed synthesis of 2‐(trifluoromethyl)‐dibenzopyranones from easily available 4‐(trifluoromethyl)‐p‐quinols and N‐methoxyarylamides is described. Rhodium(III)‐catalyzed formal anti‐Michael addition was proposed to be a crucial step in this [3+3] annulation with N‐methoxyarylamides as effective 1,3‐dipoles, providing a concise and efficient approach for the construction of trifluoromethyl‐containing dibenzopyranones under mild reaction conditions.

中文翻译：

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铑（III）催化的正式抗迈克尔加成反应为关键步骤合成2-（三氟甲基）-二苯并吡喃酮

描述了一种新型的铑（III）催化的合成方法，它由易于获得的4-（三氟甲基）-对苯二酚和N-甲氧基芳基酰胺合成2-（三氟甲基）-二苯并吡喃酮。铑（III）催化的正式反迈克尔加成反应是将N-甲氧基芳酰胺作为有效的1,3-偶极子进行[3 + 3]环化反应的关键步骤，为构造三氟甲基在温和的反应条件下含有二苯并吡喃酮。