作者:Paulo J. Coelho、Maria A. Salvador、M. Manuel Oliveira、Luis M. Carvalho
DOI:10.1055/s-2004-822890
日期:——
An efficient synthesis of 2-, 3- and 4-hydroxy-7H-benzo[c]fluoren-7-ones, useful intermediates for the synthesis of photochromic naphthopyrans, is described. The synthetic approach involves the use of oxazolines as activating groups for aromatic nucleophilic substitution and starts with readily available dimethoxynaphthaldehydes.
描述了 2-、3-和 4-羟基-7H-苯并 [c] 芴-7-酮的有效合成,这是合成光致变色萘并吡喃的有用中间体。合成方法包括使用恶唑啉作为芳香亲核取代的活化基团,并从容易获得的二甲氧基萘醛开始。