Selective α-Methylation of Aryl Ketones Using Quaternary Ammonium Salts as Solid Methylating Agents
作者:Johanna Templ、Michael Schnürch
DOI:10.1021/acs.joc.1c03158
日期:2022.3.18
We describe the use of phenyl trimethylammonium iodide (PhMe3NI) as an alternative methylating agent for introducing a CH3 group in α-position to a carbonyl group. Compared to conventional methylating agents, quaternary ammonium salts have the advantages of being nonvolatile, noncancerogenic, and easy-to-handle solids. This regioselective method is characterized by ease of operational setup, use of
我们描述了使用苯基三甲基碘化铵 (PhMe 3 NI) 作为替代甲基化剂将 α 位的 CH 3基团引入羰基。与常规甲基化剂相比,季铵盐具有不挥发、不致癌、易处理的优点。这种区域选择性方法的特点是易于操作设置,使用苯甲醚作为绿色溶剂,产率高达 85%。