Quinones may be perfluoroalkylated by means of perfluoroalkyltrihydrocarbyl silane using certain active alkali metal salt catalysts and a proton source. The reaction--which is conducted, preferably in a suitable liquid phase reaction medium, most preferably a dipolar aprotic solvent--results in the formation of gem-disubstituted cyclohexadienones in which the gem substitutes are a perfluoroalkyl group and a hydroxyl group. These gem-disubstituted compounds in turn can be readily converted to perfluoroalkyl substituted aromatics, thus circumventing the traditional need for photochlorination followed by halogen exchange using hydrogen fluoride as a means of preparing perfluoroalkyl aromatic compounds.
Quinones可以通过使用某些活性碱
金属盐催化剂和质子源的
全氟烷基三羟基烷基
硅烷进行
全氟烷基化。反应最好在适当的液相反应介质中进行,最好是二极非质子溶剂。该反应产生的是双取代环
己二烯酮,其中双取代基是
全氟烷基和羟基。这些双取代化合物可以轻松地转化为
全氟烷基取代芳香族化合物,从而避免了传统的需要通过光
氯化和使用
氢氟酸进行卤素交换的方法来制备
全氟烷基芳香族化合物的需求。