Quinones may be perfluoroalkylated by means of perfluoroalkyltrihydrocarbyl silane using trialkylphosphites or hexahydrocarbylphosphorous triamides, or both as catalysts. The reaction --which is conducted under essentially anhydrous conditions, 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 substituents are a perfluoroalkyl group and a trihydrocarbylsiloxy 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可以通过使用三氢烷基
硅烷的
全氟烷基化剂,并使用三烷基
膦酸酯或六氢烷基膦三酰胺作为催化剂进行
全氟烷基化。该反应在基本无
水条件下进行,最好在适当的液相反应介质中进行,最好是一个双极无原子溶剂,其结果是形成gem-二取代环
己二烯酮,其中gem取代基是
全氟烷基和三氢烷基氧基。这些gem-二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,从而避免了传统的光
氯化和使用
氢氟酸进行卤素交换以制备
全氟烷基芳香族化合物的需要。