We report a novel one-step synthesis of tetraphenyl substituted furoindoles involving acid-catalyzed cascade approach of commercially available m-aminophenols with readily accessible α-hydroxyaldehydes. The tandem reactions involved nucleophilic addition, aldimine condensation, pinacol rearrangement, α-iminol rearrangement, cyclization and dehydration aromatization process. The yield of furoindoles was up to 75%.

中文翻译：

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串联反应合成四苯基呋喃吲哚

我们报告涉及市售的酸催化级联途径四苯基取代furoindoles的新型一步法合成米氨基苯酚与易于接近α -hydroxyaldehydes。串联反应涉及亲核加成、醛亚胺缩合、频哪醇重排、α-亚胺醇重排、环化和脱水芳构化过程。呋喃吲哚的产率高达75%。