Prins cyclization of isoprenol with various aldehydes using MoO3/SiO2 prepared by impregnation or sol gel method as a catalyst

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F17%3A43913220" target="_blank" >RIV/60461373:22310/17:43913220 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1007/s11144-016-1131-5" target="_blank" >http://dx.doi.org/10.1007/s11144-016-1131-5</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s11144-016-1131-5" target="_blank" >10.1007/s11144-016-1131-5</a>

Result language

angličtina

Original language name

Prins cyclization of isoprenol with various aldehydes using MoO3/SiO2 prepared by impregnation or sol gel method as a catalyst

Original language description

MoO3/SiO2 was used a as catalyst of Prins cyclization of isoprenol with various aldehydes, isovaleraldehyde was chosen as a model substance. Two methods of catalysts preparation were applied, impregnation and sol-gel, and differences between their structure and catalytic activity were studied. Prepared catalysts were characterized by available methods (XRD, XRF, N2 adsorption, SEM and TGA). It was discovered that sol gel prepared catalyst has better dispersion of molybdenum oxide on the support and contains lower amount of crystallites of MoO3 compared to the impregnation one. Due to this fact the higher yield of desired product (substituted tetrahydropyranol) was achieved using sol-gel prepared catalyst (51 %) in comparison with the impregnation one (45 %). Influence of reaction conditions was tested and it was discovered that changing of molybdenum oxide amount in the catalyst had no effect on activity or selectivity but the increment of total catalyst amount in the reaction mixture increased the reaction rate. Water addition had positive effect on the selectivity to desired product (yield up to 60 %) but decreased the reaction rate. The prepared catalyst can be reused four times in this reaction without any loss of activity or selectivity and it can be also used in Prins cyclization of isoprenol with various aldehydes. The advantages of MoO3/SiO2 are its heterogeneous state in the reaction, simply preparation, availability and low cost of raw materials, reusability and activity, which is comparable with other heterogeneous catalysts used in this reaction before.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10401 - Organic chemistry

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)

Publication year

2017

Confidentiality

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

Name of the periodical

REACTION KINETICS AND CATALYSIS LETTERS

ISSN

0133-1736

e-ISSN

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Volume of the periodical

121

Issue of the periodical within the volume

1

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

13

Pages from-to

83-95

UT code for WoS article

000401935400007

EID of the result in the Scopus database

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