5298-27-1

preparation by reaction of p-methoxyben-zoic acid (p-anisic acid) with resorcinol,in the presence of Zeolite-H-beta in refluxing p-chlorotoluene (162°) for 3 h, with stirring and azeotropic removal of water (55%) ;in the presence of zinc chloride at 160° (Nencki reaction) ;in the presence of zinc chloride and phosphorous oxychloride during 3 h at.