Synthesis of 3-substituted 2-oxindoles from secondary α-bromo-propionanilides <i>via</i> palladium-catalyzed intramolecular cyclization
作者:Hui Shen、Yu Du、Jian Kan、Weiping Su
DOI:10.1039/d2ob00480a
日期:——
aromatic halides, coupling reactions involving oxidative addition of alkyl halides, especially secondary or tertiary halides, to transition metals tend to be more challenging. Herein a palladium-catalyzed intramolecular cyclization of α-bromo-propionanilides has been developed, delivering a series of 3-substituted 2-oxindoles in high yields. The method features easy to prepare starting materials, broad substrate
与芳族卤化物相比,涉及将卤代烷,尤其是仲卤化物或叔卤化物氧化加成到过渡金属上的偶联反应往往更具挑战性。本文开发了一种钯催化的 α-溴代丙酰苯胺的分子内环化,以高产率提供了一系列 3-取代的 2-羟基吲哚。该方法具有起始原料容易制备、底物范围广、官能团耐受性好等特点。已经进行了详细的机械研究。