Katalytické a mechanistické aspekty hydrogenace N-substituovaných alifatických aldiminů na heterogenních katalyzátorech

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F07%3A00018617" target="_blank" >RIV/60461373:22310/07:00018617 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Catalytic and mechanistic aspects of the hydrogenation of N-substituted aliphatic aldimines over solid catalysts

Popis výsledku v původním jazyce

This paper deals with a study of the hydrogenation of N-substituted aliphatic aldimines, especially in the relation between a heterogeneous hydrogenation catalyst and the formation of by-products. It was found that Pd and Pt catalysts exhibit high selectivity for the hydrogenation of aliphatic aldimines of the type R1-CH=N-CH2-R2 to the corresponding amine R1-CH2-NH-CH2-R2, while the selectivity of Ni and Co catalysts is substantially lower. When hydrogenation is catalysed by Ni and Co, then the predominant products, besides R1-CH2-NH-CH2-R2, are symmetric amines R1-CH2-NH-CH2-R1 and R2-CH2-NH-CH2-R2. The reaction mixtures also contain R1-CH=N-CH2-R1, R2-CH=N-CH2-R2 and R2-CH=N-CH2-R1 during hydrogenation. Reaction pathways leading to the formation ofthese by-products were postulated. The first step is Ni- and Co-catalysed isomerisation of the imine R1-CH=N-CH2-R2 to R2-CH=N-CH2-R1, which occurs under conditions of catalytic hydrogenation, and even at lower temperature when dehydrogen

Název v anglickém jazyce

Catalytic and mechanistic aspects of the hydrogenation of N-substituted aliphatic aldimines over solid catalysts

Popis výsledku anglicky

This paper deals with a study of the hydrogenation of N-substituted aliphatic aldimines, especially in the relation between a heterogeneous hydrogenation catalyst and the formation of by-products. It was found that Pd and Pt catalysts exhibit high selectivity for the hydrogenation of aliphatic aldimines of the type R1-CH=N-CH2-R2 to the corresponding amine R1-CH2-NH-CH2-R2, while the selectivity of Ni and Co catalysts is substantially lower. When hydrogenation is catalysed by Ni and Co, then the predominant products, besides R1-CH2-NH-CH2-R2, are symmetric amines R1-CH2-NH-CH2-R1 and R2-CH2-NH-CH2-R2. The reaction mixtures also contain R1-CH=N-CH2-R1, R2-CH=N-CH2-R2 and R2-CH=N-CH2-R1 during hydrogenation. Reaction pathways leading to the formation ofthese by-products were postulated. The first step is Ni- and Co-catalysed isomerisation of the imine R1-CH=N-CH2-R2 to R2-CH=N-CH2-R1, which occurs under conditions of catalytic hydrogenation, and even at lower temperature when dehydrogen

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CI - Průmyslová chemie a chemické inženýrství

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2007

Kód důvěrnosti údajů

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

Název periodika

Applied Catalysis

ISSN

0926-860X

e-ISSN

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Svazek periodika

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Číslo periodika v rámci svazku

330

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

12

Strana od-do

96-107

Kód UT WoS článku

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EID výsledku v databázi Scopus

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