Ruthenium-Catalyzed Redox-Neutral [4 + 1] Annulation of Benzamides and Propargyl Alcohols via C–H Bond Activation
作者:Xiaowei Wu、Bao Wang、Shengbin Zhou、Yu Zhou、Hong Liu
DOI:10.1021/acscatal.7b00031
日期:2017.4.7
transition-metal-catalyzed cycloaddition reactions, in which they generally serve as two-carbon reaction partners. Herein, we report ruthenium(II)-catalyzed redox-neutral [4 + 1] annulation of benzamides and propargyl alcohols, in which propargyl alcohols act as one-carbon units. This synthetic utility of propargyl alcohols led to a series of potentially bioactive N-substituted quaternary isoindolinones
内部炔烃已广泛用于过渡金属催化的环加成反应中,在这些反应中,它们通常用作两碳反应伙伴。在这里,我们报告了钌(II)催化的苯甲酰胺和炔丙醇的氧化还原中性[4 +1]环化反应,其中炔丙醇充当一个碳单元。炔丙醇的这种合成效用导致在温和条件下具有中等至高收率的一系列潜在的具有生物活性的N-取代的季异吲哚满酮。无需外部金属氧化剂,此标题转换即可与各种官能团兼容,从而进一步强调了其合成用途和广泛的适用性。此外,已经进行了初步的机理实验,并提出了合理的机理。