Acid catalyzed acetalization of aldehydes with diols resulting into the formation of fragrant cyclic acetals
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F19%3A43918550" target="_blank" >RIV/60461373:22310/19:43918550 - isvavai.cz</a>
Nalezeny alternativní kódy
RIV/60461373:22810/19:43918550
Výsledek na webu
<a href="https://link.springer.com/content/pdf/10.1007%2Fs11144-019-01595-9.pdf" target="_blank" >https://link.springer.com/content/pdf/10.1007%2Fs11144-019-01595-9.pdf</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s11144-019-01595-9" target="_blank" >10.1007/s11144-019-01595-9</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Acid catalyzed acetalization of aldehydes with diols resulting into the formation of fragrant cyclic acetals
Popis výsledku v původním jazyce
The influence of reaction conditions (amount and type of the catalyst, the reaction temperature, the type of the solvent) on the reaction course of the acetalization of aldehydes with diols was tested in this paper. The optimization of reaction conditions was performed on model reaction, acetalization of 2-methylpentanal by 2-methyl-2-propyl-1,3-propanediol leading to the formation of fragrant compound 2-(1-methylbutyl)-5-methyl-5-propyl-1,3-dioxane (Troenan). p-Toluenesulfonic acid was used as an active homogeneous catalyst. It appeared to be advantageous not to use any solvent in the reaction. Using 0.3 wt% of the catalyst the almost total conversion of 2-methylpentanal was achieved after 240 min of reaction at room temperature while the selectivity to the desired product was about 98%. The optimized reaction conditions were applied to the preparation of four cyclic fragrant acetals (namely 2-hexyl-1,3-dioxolane, 2-hexyl-4-methyl-1,3-dioxolane, 2-benzyl-5-hydroxy-1,3-dioxane and 2-(1-methylbutyl)-5-methyl-5-propyl-1,3-dioxane) in larger scale; and these were sensory evaluated after purification step. Prepared heterogeneous catalysts, acid modified montmorillonite (MMT) K-10 (treated by H2SO4, HNO3, and HCl) were successful in the model reaction. The conversion of 2-methylpentanal over 90% was achieved using acid modified MMT after 300 min of reaction at room temperature, the selectivity to the desired product was about 98%. MMT/H2SO4 can be used in the model reaction four times without any change in the reaction course, what makes it promising for the further application. © 2019, Akadémiai Kiadó, Budapest, Hungary.
Název v anglickém jazyce
Acid catalyzed acetalization of aldehydes with diols resulting into the formation of fragrant cyclic acetals
Popis výsledku anglicky
The influence of reaction conditions (amount and type of the catalyst, the reaction temperature, the type of the solvent) on the reaction course of the acetalization of aldehydes with diols was tested in this paper. The optimization of reaction conditions was performed on model reaction, acetalization of 2-methylpentanal by 2-methyl-2-propyl-1,3-propanediol leading to the formation of fragrant compound 2-(1-methylbutyl)-5-methyl-5-propyl-1,3-dioxane (Troenan). p-Toluenesulfonic acid was used as an active homogeneous catalyst. It appeared to be advantageous not to use any solvent in the reaction. Using 0.3 wt% of the catalyst the almost total conversion of 2-methylpentanal was achieved after 240 min of reaction at room temperature while the selectivity to the desired product was about 98%. The optimized reaction conditions were applied to the preparation of four cyclic fragrant acetals (namely 2-hexyl-1,3-dioxolane, 2-hexyl-4-methyl-1,3-dioxolane, 2-benzyl-5-hydroxy-1,3-dioxane and 2-(1-methylbutyl)-5-methyl-5-propyl-1,3-dioxane) in larger scale; and these were sensory evaluated after purification step. Prepared heterogeneous catalysts, acid modified montmorillonite (MMT) K-10 (treated by H2SO4, HNO3, and HCl) were successful in the model reaction. The conversion of 2-methylpentanal over 90% was achieved using acid modified MMT after 300 min of reaction at room temperature, the selectivity to the desired product was about 98%. MMT/H2SO4 can be used in the model reaction four times without any change in the reaction course, what makes it promising for the further application. © 2019, Akadémiai Kiadó, Budapest, Hungary.
Klasifikace
Druh
J<sub>imp</sub> - Článek v periodiku v databázi Web of Science
CEP obor
—
OECD FORD obor
10401 - Organic chemistry
Návaznosti výsledku
Projekt
<a href="/cs/project/LO1613" target="_blank" >LO1613: Výzkum nových materiálů pro chemický průmysl</a><br>
Návaznosti
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach
Ostatní
Rok uplatnění
2019
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Reaction Kinetics Mechanisms and Catalysis
ISSN
1878-5190
e-ISSN
—
Svazek periodika
127
Číslo periodika v rámci svazku
2
Stát vydavatele periodika
US - Spojené státy americké
Počet stran výsledku
14
Strana od-do
727-740
Kód UT WoS článku
000475580200012
EID výsledku v databázi Scopus
2-s2.0-85066778815