| TRANSESTERIFICATION OF METHANOL WITH ETHYL ACETATE AND ETHANOL WITH METHYL FORMATE CATALYZED BY DBN |
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| 作者姓名： | 刘兴泉 贾朝霞 吴玉塘 于作龙 |
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| 作者单位： | 中国科学院成都有机化学研究所 |
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| 摘 要： | 采用三步合成了１，５二氮杂环双环［４，３，０］壬烯５（ＤＢＮ）并考察了其在酯交换反应中的催化活性。结果表明，在没有环氧丙烷（ＰＯ）助剂存在时，ＤＢＮ的催化活性很低；但在有ＰＯ助催化剂存在时，ＤＢＮ对酯交换反应的催化活性极高，其催化活性随ＤＢＮ和ＰＯ浓度的增加而增大。考察了反应温度对ＤＢＮ催化剂的酯交换活性的影响，提出了酯交换反应的催化机理。
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| 关 键 词： | DBN合成 有机碱催化剂 有机含氮杂环烯烃 酯交换 环氧丙烷助催化剂 |
TRANSESTERIFICATION OF METHANOL WITH ETHYL ACETATE AND ETHANOL WITH METHYL FORMATE CATALYZED BY DBN |
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| Xingquan Liu,Zhaoxia Jia,Yutang Wu,Zuolong Yu.TRANSESTERIFICATION OF METHANOL WITH ETHYL ACETATE AND ETHANOL WITH METHYL FORMATE CATALYZED BY DBN[J].Journal of Natural Gas Chemistry,1998,7(4):313-318. |
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| Authors: | Xingquan Liu Zhaoxia Jia Yutang Wu Zuolong Yu |
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| Institution: | Chengdu Institute of Organic Chemistry, The Chinese Academy of Sciences Chengdu, Sichuan 610041 |
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| Abstract: | The 1,5 diazabicyclonon 5 ene (DBN) was synthesized by three steps and its catalytic activities for transesterification of methanol with ethyl acetate and ethanol with methyl formate were investigated. The results manifested that the catalytic activities of DBN are very high in the presence of the propylene oxide (PO) promoter, but very low in the absence of PO promoter. The activity increases with the augmentation of DBN and PO concentration. The influence of reaction temperature on the activity of DBN catalyst for transesterification reaction was examined and the supposed mechanism of transesterification was proposed. |
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| Keywords: | DBN catalyst organic nitrogenous heterocyclic alkylene methyl formate ethyl acetate transesterification propylene oxide promoter |
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