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机构地区:[1]杭州职业技术学院,浙江杭州310018 [2]平湖海达化工有限公司,浙江平湖314207
出 处:《化学试剂》2013年第10期954-956,共3页Chemical Reagents
基 金:杭州市属高校绿色精细化工研究与技术转化重点实验室资助项目(HZJ2012-02)
摘 要:以绿色化工理念改进合成工艺,以乙二胺和双(三氯甲基)碳酸酯为起始原料,在相转移催化剂的作用下于甲苯溶剂中合成了2-咪唑烷酮,然后在离子液体催化体系中用碳酸二甲酯为甲基化试剂,合成了标题化合物。该方法反应条件温和,反应总收率达78%。目标化合物结构经IR与1HNMR证实。The 1, 3-dimethyl-2-imidazolidinone was synthe- sized with 2-imidazolidone and dimethyl carbonate as the raw materials in the ionic liquid catalytic system. The intermediate 2-imidazolidone was synthesized with ethylenediamine and bis (triehloromethyl) carbonate with phase transfer catalyst in tol- uene. The results show that the best conditions for the synthe- sis of 1,3-dimethyl-2-imidazolidinone are as follows:DMF as the solvent and n (2-imidazolidone) : n ( DMC ) = 1 : 2.25, the reaction time is 5 h under 90 - 95 ℃. Total yield of the reac- tion is 78%. The process is of moderate conditions and is friendly to the environment. The structure of the products were confirmed by IR and 1HNMR.
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