Copper-catalyzed electrochemical synthesis of alkylidene lactones from carbon dioxide and 1,4-diarylbuta-1,3-diynes
作者:Chuan-Hua Li、Gao-Qing Yuan、Chao-Rong Qi、Huan-Feng Jiang
DOI:10.1016/j.tet.2013.02.089
日期:2013.4
The novel synthesis of alkylidene lactones from carbon dioxide with 1,4-diarylbuta-1,3-diynes via copper-catalyzed electrochemical route is described. The procedure was smoothly performed in an undivided electrochemical cell fitted with Ni cathode and Al anode, containing n-Bu4NBr–DMF electrolyte with a constant current under 4 MPa pressure of CO2. The corresponding alkylidene lactones could be obtained
描述了通过铜催化的电化学路线由二氧化碳与1,4-二芳基丁基-1,3-二炔新型合成亚烷基内酯的方法。该过程在装有Ni阴极和Al阳极的不分隔电化学电池中顺利进行,该电化学电池包含在4 MPa的CO 2压力下恒流的n - Bu 4 NBr-DMF电解质。在催化剂CuI的存在下,可以以中等至良好的产率获得相应的亚烷基内酯,而在没有任何催化剂的情况下获得了以γ-酮为主要产物的羧酸。还简要讨论了反应机理。