formation of ynones from a variety of acyl chlorides and terminal alkynes catalyzed by a nanosized MCM-41 anchored palladium bipyridyl complex is described herein. Aroyl, heteroaroyl, and alkyl acyl chlorides were easily coupled with terminal alkynes, giving good to high isolated yields in the presence of a very low catalyst loading (0.002–0.1 mol % Pd) in Et3N or diisopropylethylamine at 50 °C. Furthermore
本文描述了一种高效且实用的方法,该方法由纳米级MC
M-41锚定
钯联
吡啶络合物催化的各种酰
氯和末端
炔烃形成炔酮。芳酰基,杂芳酰基和烷基酰基
氯很容易与末端
炔烃偶联,在50°C的Et 3 N或
二异丙基乙胺中催化剂负载量极低(0.002-0.1 mol%Pd)的情况下,分离产率高至良好。此外,单批反应的反应规模高达150 mmol,为实际合成应用提供了潜力。离心后,负载的催化剂能够被再循环并重复使用几次,而活性仅略有下降。