中文摘要：

对碳酸二甲酯（DMC）与4，4′-二苯甲烷二胺（MDA）合成4，4′-二苯甲烷二氨基甲酸甲酯（MDC）的反应过程进行了研究，采用质谱、元素分析、红外光谱以及核磁共振氢谱等手段，对反应中间产物和最终产物进行了分离、组成结构分析和确认。研究结果表明，该反应是一个经过中间产物的串联反应，主产物为MDC，中间产物结构为4-（4′-氨苯基）苯甲烷氨基甲酸甲酯。

英文摘要：

The synthesis of methyl-4,4′-di （phenylcarbamate） （MDC） from the reaction of 4,4′-methylenedianiline （MDA） with dimethylcarbonate （DMC） was investigated; the reaction intermediate and final product were separated, purified, analyzed and identified by liquid chromatography, mass spectrometry, element analysis, Fourier transform infrared spectroscopy and ^1H nuclear magnetic resonance spectroscopy. The results illustrated that this synthesis reaction is a consecutive process through an intermediate; the final product is MDC and the intermediate is methyl-4-（4′-aminobenzyl）phenylcarbamate.