MWW-type zeolite nanostructures for a one-pot three-component Prins-Friedel-Crafts reaction
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F22%3A10452883" target="_blank" >RIV/00216208:11310/22:10452883 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11320/22:10452883
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=ycxcWwsBXR" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=ycxcWwsBXR</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1039/d1qi01497h" target="_blank" >10.1039/d1qi01497h</a>
Alternative languages
Result language
angličtina
Original language name
MWW-type zeolite nanostructures for a one-pot three-component Prins-Friedel-Crafts reaction
Original language description
The one-pot Prins-Friedel-Crafts reaction of aldehydes, a homoallylic alcohol and aromatics catalyzed by large-pore zeolites is an attractive environmentally friendly route towards valuable heterocyclic compounds containing a 4-aryltetrahydropyran moiety. Herein, the catalytic behavior of a set of MWW zeolite catalysts with tunable textural properties (e.g., three-dimensional MCM-22 and MCM-49, layered MCM-56 and MCM-36 materials) and variable chemical compositions was investigated in the Prins-Friedel-Crafts reaction involving either butyraldehyde or benzaldehyde and compared to that of a large pore beta zeolite. MWW zeolites differing in the concentration of acid sites 0.16-0.55 mmol g(-1) and Bronsted-to-Lewis acid site ratios BAS/LAS = 1.0-1.7 showed similar selectivities towards targeted 4-alkyltetrahydropyran-containing products (71-75% at 67% conversion of butyraldehyde), which exceed the value attained over a hierarchical beta zeolite (55-58% at the same conversion) with similar textural characteristics. While the conversion of relatively small butyraldehyde increased with the total concentration of acid sites in MWW catalysts, it was not affected by textural characteristics of MWW zeolites (98% and 100% over microporous MCM-22 and micro-mesoporous MCM-36, respectively). In contrast, not only a high concentration of acid sites but also their enhanced accessibility were the key factors, which provide the highest conversion (82%) and selectivity (50%) over micro-mesoporous MCM-36 using benzaldehyde as a substrate. Hierarchical MWW zeolite catalysts offered higher yields of targeted 4-aryltetrahydropyran in comparison with the conventional beta zeolites and previously reported hierarchical beta zeolites due to (1) the improved selectivity conditioned by lower strength of LAS and (2) maintaining high conversion due to the abundance of accessible acid sites on the well-exposed surface.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10403 - Physical chemistry
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Inorganic Chemistry Frontiers [online]
ISSN
2052-1553
e-ISSN
2052-1553
Volume of the periodical
9
Issue of the periodical within the volume
6
Country of publishing house
GB - UNITED KINGDOM
Number of pages
14
Pages from-to
1244-1257
UT code for WoS article
000755183600001
EID of the result in the Scopus database
2-s2.0-85127868374