MWW-type zeolite nanostructures for a one-pot three-component Prins-Friedel-Crafts reaction

Kód výsledku v 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>

Nalezeny alternativní kódy

RIV/00216208:11320/22:10452883

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

MWW-type zeolite nanostructures for a one-pot three-component Prins-Friedel-Crafts reaction

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

MWW-type zeolite nanostructures for a one-pot three-component Prins-Friedel-Crafts reaction

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Inorganic Chemistry Frontiers [online]

ISSN

2052-1553

e-ISSN

2052-1553

Svazek periodika

9

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

14

Strana od-do

1244-1257

Kód UT WoS článku

000755183600001

EID výsledku v databázi Scopus

2-s2.0-85127868374