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.
Copper-assisted synthesis of dihydropyrano[2.3-<i>b</i>]indole-4-ones by domino cascade reaction
作者:Yang Luo、Xue Zhong、Jiang-Kun Huang、Ling He
DOI:10.1039/d1ob00078k
日期:——
A novel copper-catalyzed cascade intermolecular and intramolecular oxidation/cyclization domino one-pot reaction process for the regioselective synthesis of dihydropyrano[2.3-b]indol-4(9H)-ones has been successfully developed. In this methodology, it is proposed for the first time that the 4-benzyloxy group of indole substrates can be used as a guiding group to promote cyclization under mild conditions
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。