ALDOL CONDENSATIONS OVER LAYERED DOUBLE HYDROXIDES

被引：0
|
作者：
Fidlerova, B. [1 ]
Paterova, I [1 ]
Cerveny, L. [1 ]
机构：
[1] Univ Chem & Technol Prague, Tech 5, Prague 16628 6, Dejvice, Czech Republic
来源：
PROCEEDINGS OF THE 6TH INTERNATIONAL CONFERENCE ON CHEMICAL TECHNOLOGY (ICCT) | 2018年
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中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
This work focuses on utilization of layered double hydroxides for aldol condensation of campholenic aldehyde with propanal or butanal. The influence of reaction conditions (Mg: Al molar ratio and conditions of LDHs activation) on reaction course were studied in order to produce aldehydes 2-methyl-4-(2,2,3-trimethylcyclopent3- en-1-yl) but-2-enal and 2-ethyl-4-(2,2,3-trimethylcyclopent-3-en-1-yl) but-2-enal. Campholenic aldehyde was prepared by alpha-pinene oxide isomerization with ZnBr2 (total conversion, 89% selectivity to campholenic aldehyde, 70 degrees C, toluene). Layered double hydroxides (LDHs) with Mg: Al molar ratio ranging 2: 1 - 3 : 1 were characterized by various techniques (AAS, XRF). It was found, that catalysts were inactive in campholenic aldehyde and propanal (butanal) condensation under tested reaction conditions. Only auto-condensation products of propanal and butanal occurred in the reaction mixture (up to 79%).
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页码：359 / 363
页数：5
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