研究以甲醇钠为催化剂，用碳酸二甲酯（ＤＭＣ）替代光气和２，４－二氨基甲苯合成２，４－ 甲苯二氨基甲酸甲酯反应．加入甲酸甲酯，可使２，４－甲苯二氨基甲酸甲酯的产率提高２０％， 反应中２，４－甲苯二甲酰胺和Ｎ－（２－甲基－５－氨基）苯基甲酰胺的生成对２，４－甲苯二氨基甲 酸甲酯产率的提高具有重要作用．以此为基础，推测了反应历程． In this paper, sodium methoxide was used as a catalyst to synthesize 2,4-toluenediocarbamic acid methyl ester by using dimethyl carbonate (DMC) instead of phosgene and 2,4-diaminotoluene. The addition of methyl formate resulted in a 20% increase in the yield of methyl 2,4-toluene dicarbamate with 2,4-toluyldicarboxamide and N- (2-methyl-5-amino) phenylmethyl The amide formation has an important effect on the yield of 2,4-toluene dicarbamate. Based on this, we speculated that the reaction process.