Hydrotalcite-like compounds for aldol condensation of cyclopentanone and valeraldehyde

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F19%3A43918219" target="_blank" >RIV/60461373:22310/19:43918219 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Hydrotalcite-like compounds for aldol condensation of cyclopentanone and valeraldehyde
Original language description
Aldol condensation is an important and useful reaction in C-C bond formation. It is commonly catalysed by NaOH, KOH etc. solutions. Using homogeneous catalysts in this process brings some negative aspects1. Developing a new active heterogeneous base catalyst, such as hydrotalcite-like materials (HT)2, can simplify it in comparison with traditional homogeneous catalysts. 2 Pentylidenecyclopentanone (Fig.1, III) can be obtained by aldol condensation of cyclopentanone (I) and valeraldehyde (II). This compound can be subsequently hydrogenated to a fragrance 2 pentylcyclopentan-1-one (IV), commercially also known as Delphone (Firmenich). This work focuses on the possible utilization of unmodified Mg/Al hydrotalcite-like compounds and also HT modified by palladium, which could serve as a hydrogenation component, in this fragrance synthesis. The activity of prepared catalysts by coprecipitation method with different Mg:Al molar ratios and HT modified by Pd by impregnation method has been studied in aldol condensation of cyclopentanone and valeraldehyde. Reaction conditions were optimized in order to improve selectivity to 2 pentylidenecyclopentanone (reactants ratio, the method of the catalyst activation (calcination or rehydration), the reaction temperature and the catalyst amount).
Czech name
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Czech description
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Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
Proceedings of the 7th International Conference on Chemical Technology
ISBN
978-80-88307-00-6
ISSN
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e-ISSN
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Number of pages
5
Pages from-to
254-258
Publisher name
Czech Society of Industrial Chemistry
Place of publication
Prague
Event location
Mikulov
Event date
Apr 15, 2019
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
000515696600046

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