Kinetics of Aldol Condensation of Furfural with Acetone Catalyzed by 1,8-Diazabicyclo[5.4.0]undec-7-ene
Kinetics of Aldol Condensation of Furfural with Acetone Catalyzed by 1,8-Diazabicyclo[5.4.0]undec-7-ene
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DOI：
10.4236/msce.2018.62005
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发表时间：
2018-02
期刊：
影响因子：
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通讯作者：
Chengjun Jiang;Lin Cheng;Guilin Cheng
中科院分区：
文献类型：
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作者：
Chengjun Jiang;Lin Cheng;Guilin Cheng
研究了无溶剂条件下1，8-二氮杂双环[5.4.0]十一碳-7-烯（DBU）催化糠醛与丙酮的羟醛缩合反应动力学。在优化条件下，DBU催化1，4-戊二烯-3-酮-1，5-二呋喃基的最高收率可达98.0%。根据动力学分析，糠醛的反应级数为1.0，表观活化能为17.7 kJ.mol.1，指前因子为2.67 L.min.1，符合Arrhenius方程，这解释了DBU催化剂的高效率。DBU催化的无溶剂羟醛缩合反应提供了一种将羟醛缩合和分离简化为单一步骤的替代路线。
The kinetics of 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU)-catalyzed aldol condensation of furfural with acetone was investigated under free solvent conditions from 50℃ - 90℃. The highest yield of 1,4-pentandien-3-on-1,5-di-furanyl catalyzed by DBU reached 98.0% under optimized conditions. According to the kinetic analysis, the reaction order of furfural was estimated as 1.0, the apparent activation energy was 17.7 kJ.mol.1, and the pre-exponential factor was 2.67 L.min.1 in fitting with the Arrhenius equation, which explains the high efficiency of the DBU catalyst. DBU-catalyzed aldol condensation with free solvent offers an alternative route to simplify aldol condensation and separation into a single step.