Aldol condensation over layered double hydroxides

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F18%3A43916184" target="_blank" >RIV/60461373:22310/18:43916184 - 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
Aldol condensation over layered double hydroxides
Original language description
Aldol condensation is usually catalyzed by hydroxides, such as NaOH and Ca(OH)2, but their use leads to problems with wastewater treatments.1 For this reason, various solid base heterogeneous materials which can be separated from the reaction mixture and possibly reused, are studied.2 Layered double hydroxides (LDHs; synthetic analogues of hydrotalcites) are quite promising materials to catalyze such reaction. This work focuses on utilization of LDHs for aldol condensation of campholenic aldehyde (CA) with propanal or butanal. CA was prepared by α-pinene oxide isomerization with ZnBr2 (total conversion, 89% selectivity to CA, 70 °C, toluene). Prepared LDHs were characterized by various techniques (AAS, XRD, XRF etc.). The influence of reaction conditions (Mg:Al molar ratio, conditions of LDHs activation, presence of a modification component, reactants ratio, temperature etc.) on reaction course were studied in order to produce aldehydes I or II (Scheme 1). Subsequently these compounds can be hydrogenated to obtain fragrances like Levosandol and Brahmanol.
Czech name
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Czech description
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Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
PROCEEDINGS of the 6th International Conference on Chemical Technology
ISBN
978-80-86238-77-7
ISSN
2336-8128
e-ISSN
neuvedeno
Number of pages
4
Pages from-to
359-363
Publisher name
Česká společnost průmyslové chemie (ČSPCH)
Place of publication
Praha
Event location
Mikulov
Event date
Apr 16, 2018
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
000461293800066

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