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以邻硝基甲苯为原料，经催化加氢还原合成２，２＇－二甲基氢化偶氮苯。研究了各种影响反应的因素。在优化条件下，产品纯度可达９８％以上，收率可达９３％。
Using o-nitrotoluene as raw material, 2,2’-dimethylhydrazobenzene was synthesized by catalytic hydrogenation. Studied various factors that affect the response. Under the optimized conditions, the purity of the product can reach more than 98% and the yield can reach 93%.