Photocatalytic Hydromethylation and Hydroalkylation of Olefins Enabled by Titanium Dioxide Mediated Decarboxylation
作者:Qilei Zhu、Daniel G. Nocera
DOI:10.1021/jacs.0c08688
日期:2020.10.21
photooxidative redox capacity of the valence band of anatase titanium dioxide (TiO2). Mechanistic studies support a radical-based mechanism involving the photoexcitation of TiO2 with 390-nm light in the presence of acetic acid and other carboxylic acids to generate methyl and alkyl radicals, respectively, without the need for stoichiometric base. This protocol is accepting of a broad scope of alkene
通过使用锐钛矿二氧化钛 (TiO2) 价带的光氧化氧化还原能力,实现了一种在室温下进行烯烃氢甲基化和氢烷基化的通用方法。机理研究支持基于自由基的机制,涉及在乙酸和其他羧酸存在下用 390 nm 光光激发 TiO2 分别生成甲基和烷基自由基,而不需要化学计量的碱。该协议接受范围广泛的烯烃和羧酸,包括具有挑战性的那些产生高反应性伯烷基自由基的物质和那些含有易受亲核取代(如卤代烷)影响的官能团的物质。