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Statements

Subject Item
n2:RIV%2F61388955%3A_____%2F08%3A00309860%21RIV09-AV0-61388955
rdf:type
skos:Concept n17:Vysledek
dcterms:description
The synthesis of N-substituted imidazoles via alkylation of imidazole with 1-bromobutane using sonochemical and thermal activations over zeolites (H-ZSM-5, Mordenite, H-Beta and H-Y) is reported. The effect of the acidity and channel size of zeolites on the activity and selectivity of imidazole alkylation was investigated in a liquid phase. The N-alkylimidazoles are important intermediates in the synthesis of pharmaceuticals with antiviral properties. N-alkylimidazoles were obtained in high yields (>80%) as main product (100% selectivity) under mild conditions, ultrasound (US) activation at 333 K in only 1 h, when Mordenite and NH4Y zeolites were used as catalysts. The synthesis of N-substituted imidazoles via alkylation of imidazole with 1-bromobutane using sonochemical and thermal activations over zeolites (H-ZSM-5, Mordenite, H-Beta and H-Y) is reported. The effect of the acidity and channel size of zeolites on the activity and selectivity of imidazole alkylation was investigated in a liquid phase. The N-alkylimidazoles are important intermediates in the synthesis of pharmaceuticals with antiviral properties. N-alkylimidazoles were obtained in high yields (>80%) as main product (100% selectivity) under mild conditions, ultrasound (US) activation at 333 K in only 1 h, when Mordenite and NH4Y zeolites were used as catalysts. Práce se zabývá syntézou N-substituovaných imidazolů alkylací imidazolu 1-brombutanem za použití sonochemické a termické aktivace. Reakce byly katalyzované zeolity H-ZSM-5, Mordenit, H-Beta a H-Y. Zkoumám byl vliv kyselosti a struktury zeolitů na aktivitu a selektivitu alkylace imidazolu v kapalné fázi. N-alkylimidazoly představují důležité meziprodukty pro syntézu farmak s protivirovými vlastnostmi. V přítomnosti Mordenitu a NH4Y zeolitu byly N-alkylimidazoly získány ve vysokých výtěžcích (>80%) jako hlavní produkt (selektivita 100%) při mírných reakčních podmínkách, ultrazvukové aktivaci při 333 K během 1 h.
dcterms:title
Sonocatalysis and zeolites: An efficient route to prepare N-alkylimidazoles Kinetic aspects Sonocatalysis and zeolites: An efficient route to prepare N-alkylimidazoles Kinetic aspects Sonokatalýza a zeolity: vhodný postup pro přípravu N-alkylimidazolů
skos:prefLabel
Sonokatalýza a zeolity: vhodný postup pro přípravu N-alkylimidazolů Sonocatalysis and zeolites: An efficient route to prepare N-alkylimidazoles Kinetic aspects Sonocatalysis and zeolites: An efficient route to prepare N-alkylimidazoles Kinetic aspects
skos:notation
RIV/61388955:_____/08:00309860!RIV09-AV0-61388955
n3:aktivita
n7:P n7:Z
n3:aktivity
P(1QS400400560), Z(AV0Z40400503)
n3:cisloPeriodika
1-2
n3:dodaniDat
n14:2009
n3:domaciTvurceVysledku
n9:7016662 n9:2410044
n3:druhVysledku
n18:J
n3:duvernostUdaju
n15:S
n3:entitaPredkladatele
n6:predkladatel
n3:idSjednocenehoVysledku
395949
n3:idVysledku
RIV/61388955:_____/08:00309860
n3:jazykVysledku
n12:eng
n3:klicovaSlova
N-alkylimidazoles; sonocatalysis; green chmistry
n3:klicoveSlovo
n10:green%20chmistry n10:sonocatalysis n10:N-alkylimidazoles
n3:kodStatuVydavatele
NL - Nizozemsko
n3:kontrolniKodProRIV
[ECFBBF7E6175]
n3:nazevZdroje
Applied Catalysis A - General
n3:obor
n11:CF
n3:pocetDomacichTvurcuVysledku
2
n3:pocetTvurcuVysledku
5
n3:projekt
n16:1QS400400560
n3:rokUplatneniVysledku
n14:2008
n3:svazekPeriodika
338
n3:tvurceVysledku
Čejka, Jiří Bejblová, Martina López-Peinado, A. J. Calvino-Casilda, V. Martín-Aranda, R. M.
n3:wos
000254905200018
n3:zamer
n8:AV0Z40400503
s:issn
0926-860X
s:numberOfPages
6