The acylation of a naphthalene compound, substituted in the 2-position with an electron-donating group, with a reactive derivative of a lower aliphatic acid, in an aprotic organic diluent and in the presence of a Friedel Crafts catalyst consisting of a halide of an element having at least two valences, is improved when maintaining constant at any time the molar ratio of the naphthalene compound to the acylating agent and that of the acylating agent to the Friedel Crafts catalyst within specific ranges.
当
萘化合物与酰化剂的摩尔比以及酰化剂与弗里德尔催化剂的摩尔比始终保持在特定范围内不变时,在非沸腾有机稀释剂中并在弗里德尔催化剂(由至少具有两个价位的元素的卤化物组成)存在的情况下,
萘化合物与低级脂肪族酸的活性衍
生物的酰化反应会得到改善。