Synthesis of Trifluoromethyl Ketones via Tandem Claisen Condensation and Retro-Claisen C–C Bond-Cleavage Reaction
作者:Dongmei Yang、Yuhan Zhou、Na Xue、Jingping Qu
DOI:10.1021/jo400280p
日期:2013.4.19
builds on the use of a tandem process involving Claisen condensation and retro-Claisen C–C bond cleavage reaction. Enolizable alkyl phenyl ketones were found to react readily with ethyl trifuoroacetate under the promotion of NaH to afford trifluoroacetic ester/ketone exchange products, trifluoromethyl ketones, which were quite different from the general Claisen condensation products, β-diketones. This
已经开发出了一种高效,操作简单的三氟甲基酮方法,该方法建立在使用包括克莱森缩合和逆克莱森C-C键断裂反应的串联过程的基础上。发现可溶的烷基苯基酮在NaH的促进下容易与三氟乙酸乙酯反应,得到三氟乙酸酯/酮交换产物三氟甲基酮,与一般的克莱森缩合产物β-二酮完全不同。该方法使用容易获得的起始原料,并且可以以优异的产率扩展到全氟烷基酮的制备。