【摘要】 合成了４ 种苯并三唑型的紫外吸收剂，以ＵＶ－ Ｐ为例，对还原反应步骤进行优化。得到的最佳工艺条件为２ ：硝基２′羟基５′甲基偶氮苯∶还原剂∶氢氧化钠＝ ４－２∶４－５∶４（ 质量比） ，回流反应１ ｈ。更多还原

【Abstract】 Four UV absorbers of benzotriazole structure were prepared by diazotization, coupling and reduction reactions. As an example,in preparing UV-P, the optimum technological conditions of the reduction reaction were: 2 nitro 2′ hydroxy 5′ methyl azobenzene∶reducing agent∶sodium hydroxide=4 2∶4 5∶4(weight ratio) and reflux time 1h.更多还原