Solvent-free Brønsted acid-catalyzed Michael addition of nitrogen- and carbon-containing nucleophiles by ultrasound activation
作者:Xiu-Jiang Du、Zhi-Peng Wang、Yan-Ling Hou、Cheng Zhang、Zheng-Ming Li、Wei-Guang Zhao
DOI:10.1016/j.tetlet.2013.12.059
日期:2014.1
carbon-containing nucleophiles to cyclic enones. Using this conjugate addition reaction, a variety of different nucleophiles can react with a range of cyclic enones in the presence of p-toluenesulfonic acid under solvent-free ultrasound irradiation conditions affording the corresponding C–N or C–C adducts in good to excellent yields. Comparatively, performing the reaction under ultrasound irradiation gives
已经开发出一种新的方法,用于将含氮和碳的亲核试剂迈克尔加成到环烯酮上。使用这种共轭加成反应,在对甲苯磺酸的存在下,无溶剂超声辐照条件下,多种不同的亲核试剂可以与多种环烯酮反应,从而提供相应的C–N或C–C加合物,且收率良好。 。相比之下,与在高压下进行反应相比,在超声辐射下进行反应可获得更高的产率,更有效且对环境无害。