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。
The reaction of indole derivatives bearing a 3- or 4-hydroxyalkyl chain with dimethyl sulfoxide and oxalyl chloride under Swern conditions led to a one-pot process involving three different synthetic transformations, namely oxidation of indole to oxindole, introduction of a chlorine substituent at the oxindole C-3 position, and substitution of the hydroxyl group in the side chain by chlorine. In spite