成功开发了一种新型的铜催化级联分子间和分子内氧化/环化多米诺一锅反应法,用于区域选择性合成二氢吡喃并[2.3 - b ]吲哚-4(9 H)-酮。在这种方法中,首次提出吲哚底物的4-苄氧基可用作在温和条件下促进环化的指导基团。同时,反应机理研究表明,吡喃并吲哚-4-酮中的羰基氧来自水,而引导基对反应的进行至关重要。
Arylketones can be synthesized conveniently by a palladiumcatalyzedaddition of arylboronic acid to nitriles in aqueous triflic acid. This catalytic system was extended to the addition of unprotected indoles to nitriles under a slightly modified condition to produce 3-acyl indoles in good yields.