作者:Marta Rodríguez-Rodríguez、Emmanuel Gras、Miquel A. Pericàs、Montserrat Gómez
DOI:10.1002/chem.201503858
日期:2015.12.14
Metal‐free intermolecular Huisgen cycloadditions using nonactivated internal alkynes have been successfully performed in neat glycerol, both under thermal and microwave dielectric heating. In sharp contrast, no reaction occurs in other protic solvents, such as water, ethanol, or diols. DFT calculations have shown that the BnN3/glycerol adduct promotes a more important stabilization of the corresponding
使用非活化内部炔烃的无金属分子间的惠斯根环加成反应已在纯甘油中在热和微波介电加热下成功进行。与之形成鲜明对比的是,在其他质子传递溶剂(例如水,乙醇或二醇)中没有反应发生。DFT计算表明,与类似的BnN 3 /醇加合物相比,BnN 3 /甘油加合物促进了相应LUMO的更重要的稳定化,在第一种情况下有利于与炔烃的反应性。介质中铜盐的存在不会改变反应路径(Cu(I)充当旁观者),除了二取代的甲硅烷基炔基,与无金属的体系相比,其发生甲硅烷基化。