Synthesis of Hydroxy-7<i>H</i>-benzo[<i>c</i>]fluoren-7-ones
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 nucleophilicsubstitution and starts with readily available dimethoxynaphthaldehydes.