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Schriff碱是由醛和氨缩聚而形成的一种碱类,由于其特殊的分子结构,可与某些金属反应,生成M-Salen配合物,该类配合物具有更高的活性及生理功能,且是一种良好的绿色催化剂.文章以安息香的催化氧化实验为载体,探究M-Salen配合物在安息香绿色催化氧化合成苯偶酰反应中的催化性能.利用控制变量法和正交实验法,通过改变不同的实验条件和催化剂种类,探究不同M-Salen配合物的催化效果.结果表明,Mn(Ⅱ)-Salen作为催化剂,反应温度80℃,反应时间90 min,催化用量0.5g,使用DMF作为反应溶剂,催化效果最好,产率在70%以上.正交实验分析知反应时间是最大影响因素.
Schriff base is formed by the condensation of aldehydes and ammonia, a kind of base. Because of its special molecular structure, it can react with some metals to form M-Salen complexes. These complexes have higher activity and physiological functions, And is a good green catalyst.In this paper, benzoic acid catalytic oxidation experiments as a carrier to explore the catalytic properties of Benzoin Benzoic acid synthesis of Benzoylmethane reaction of M-Salen complex.Using the control variable method and orthogonal experimental method, The catalytic effect of different M-Salen complexes was investigated by changing different experimental conditions and catalyst types. The results showed that Mn (Ⅱ) -Salen was used as catalyst, the reaction temperature was 80 ℃, the reaction time was 90 min, the catalytic amount was 0.5g, As the reaction solvent, the catalytic effect is the best, and the yield is over 70% .Orthogonal experiment shows that reaction time is the most important factor.