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-44'- METHOD FOR PREPARING METHYLENE DIPHENYL-44'-DICARBAMATE DERIVATIVE BY CONDENSATION REACTION OF URETHANE
-44'- METHOD FOR PREPARING METHYLENE DIPHENYL-44'-DICARBAMATE DERIVATIVE BY CONDENSATION REACTION OF URETHANE
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机译：-44'-尿烷缩合反应制备亚甲基二苯基-44'-二氨基甲酸酯衍生物的方法
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摘要
The present invention relates to a method for manufacturing a methylene diphenyl-4,4′-dicarbamate derivative which comprises a step of manufacturing the methylene diphenyl-4,4′-dicarbamate derivative by conducting a condensation reaction of a N-phenyl carbamate derivative and formaldehyde by using clay carrying heteropoly acid as a catalyst. By the same, it is possible to manufacture the methylene diphenyl-4,4′-dicarbamate derivative which is eco-friendly by not using a toxic reactant, and has a high yield.
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