Carbometalation–Carboxylation of 2,3-Allenols with Carbon Dioxide: A Dramatic Effect of Halide Anion
作者:Suhua Li、Bukeyan Miao、Weiming Yuan、Shengming Ma
DOI:10.1021/ol4000197
日期:2013.3.1
and stereoselective carbomagnesiation of 2,3-allenols with Grignard reagents may smoothly react with carbon dioxide to afford 2(5H)-furanones. A dramatic effect of the halide anion from the Grignard reagent (Br vs Cl) for CO2 activation was observed. The reaction proceeded smoothly under mild conditions to afford the products in 58–93% yields.
用格氏试剂通过CuCl介导的2,3-烯醇的高度区域选择性和立体选择性碳还原反应形成的环状有机金属中间体可与二氧化碳平稳反应,得到2(5 H)呋喃酮。观察到了来自格氏试剂的卤化物阴离子(Br vs Cl)对CO 2活化的显著作用。反应在温和的条件下平稳进行,以58-93%的收率得到产物。