Aerobic, Transition-Metal-Free, Direct, and Regiospecific Mono-α-arylation of Ketones: Synthesis and Mechanism by DFT Calculations
作者:Qing-Long Xu、Hongyin Gao、Muhammed Yousufuddin、Daniel H. Ess、László Kürti
DOI:10.1021/ja4074563
日期:2013.9.25
We disclose a facile, aerobic, transition-metal-free, direct, and regiospecific mono-α-arylation of ketones to yield aryl benzyl and (cyclo)alkyl benzyl ketones with substitution patterns that are currently inaccessible or challenging to prepare using conventional methods. The transformation is operationally simple, scalable, and environmentally friendly. There is no need for pre-functionalization
我们公开了一种简便、有氧、无过渡金属、直接和区域特异性的酮单-α-芳基化,以产生芳基苄基和(环)烷基苄基酮,其取代模式目前无法使用常规方法制备或难以制备。转型操作简单、可扩展且环保。不需要预官能化(即α-卤化或甲硅烷基烯醇醚形成)或使用专门的芳基化剂(即二芳基碘盐)。DFT 计算表明,原位生成的烯醇化物与硝基芳烃直接形成 CC 键,然后进行区域选择性 O2 介导的 CH 氧化。