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以2,4-二羟基二苯甲酮、4-羟基苯乙酮(HAP)为原料分别和环氧氯丙烷反应,经微波辐照合成了两种反应性紫外线吸收剂2-羟基-4-缩水甘油醚基二苯甲酮(HEPBP)和4-缩水甘油醚基苯乙酮(EPAP)。结构采用红外光谱、核磁和质谱表征。最佳合成条件为:n(羟基芳香酮)∶n(环氧氯丙烷)=1∶3,微波功率400W,于90℃反应15min,收率分别是52.6%和58.3%。与常规合成方法比较,微波合成法能降低反应温度、大大地缩短反应时间。产物中环氧丙烷基团的引入能明显改善芳香酮类紫外线吸收剂的紫外吸收性能。
Two 2,4-dihydroxybenzophenone and 4-hydroxyacetophenone (HAP) were reacted with epichlorohydrin respectively. Two reactive UV absorbers, 2-hydroxy-4- Glycidyl ether benzophenone (HEPBP) and 4-glycidyl ether acetophenone (EPAP). The structure was characterized by IR, NMR and MS. The optimal synthesis conditions were as follows: n (hydroxyaromatic ketone): n (epichlorohydrin) = 1: 3, microwave power 400W, reaction time 90min, 15min, yield 52.6% and 58.3% respectively. Compared with the conventional synthesis method, microwave synthesis method can reduce the reaction temperature, greatly shortening the reaction time. The introduction of propylene oxide groups in the product can obviously improve the UV absorption of aromatic ketones.