氧化缩合法制备二苯乙烯(烷)类化合物

PREPARATION OF DIPHENYLS AND STILBENES BY OXIDATIVE DIMERIZATION OF ARYL METHANES

芳基甲烷在有机溶剂介质中、碱催化下的氧化缩合反应 ,是合成二苯乙烯 (烷 )类化合物的重要途径 .利用 1 H NMR谱及元素分析等手段对反应产物进行表征 ,研究了多种芳基甲烷的氧化缩合反应 .结果表明 :芳基甲烷中 ,取代基的吸电子效应影响其氧化缩合反应活性及产物的结构特征 ,取代基吸电性越强 ,吸电基越多 ,氧化缩合越易发生 ,越易于生成二芳基乙烯 (烷 )化合物 .

The oxidative dimerization of aryl methanes in organic solvents by using alkaline catalysts is an important way to prepare diphenyl ethanes and diphenyl ethylenes.The oxidative dimerizations of a series of aryl methanes has been investigated and the derivatives have been characterized by using 1H NMR and elemental analysis in present paper.It is shown that,the reaction conditions of aryl methanes,the structures and properties of the products are affected by the inductive effects of the substituting groups of aryl methanes.With the increase of the amount and the ability to withdraw electron of the electron withdrawing groups,the oxidative dimerization is easy to take place.