A method for preparing 4-[3,5-bis(2-hydroxyphenyl)-[1,2,4]triazol-1-yl]benzoic acid of formula (I) by reaction of 2-(2-hydroxyphenyl)benz[e][1,3]oxazin-4-one of formula (II) with 4-hydrazinobenzoic acid of formula (III) in an organic acid or in a mixture of an organic acid and an organic solvent.
一种制备式(I)的4-[3,5-双(2-羟基苯基)-[1,2,4]三唑-1-基]
苯甲酸的方法,通过在有机酸或有机酸和有机溶剂的混合物中,将式(II)的2-(2-羟基苯基)苯并[e][1,3]
噁唑-4-酮与式(III)的4-
肼基
苯甲酸反应。