Acylation of sulfonamines using silica grafted 1-butyl-3-(3-triethoxysilylpropyl)-4,5-dihydroimidazolium ionic liquids as catalysts
| Data(s) |
29/02/2008
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| Resumo |
Heterogeneous immobilized ionic liquid catalysts were prepared via grafting of 1,3-dimethyl-3-(3-triethoxysilylpropyl)-imidazolium tetrafluoroborate or bist{(trifluoromethyl)sulfonyl} imide ([NTf2](-)) on silica supports with different surfaces and pore size. In addition to the adsorption-desorption isotherms of nitrogen at -196C, the catalysts were characterized by TG-DTA, XPS, DRIFTS, DR-UV-vis, NMR, and XRD techniques. The catalytic behavior was checked in the acylation of three different sulfonamines: benzenesulfonamine, p-nitrobenzene-sulfonamine, and p-methoxybenzene-sulfonamine with acetic acid, acetic anhydride and maleic anhydride. These tests confirmed the acid Lewis properties of these catalysts. (c) 2007 Elsevier B.V. All rights reserved. |
| Identificador |
http://dx.doi.org/10.1016/j.cattod.2007.10.028 http://www.scopus.com/inward/record.url?scp=38349139574&partnerID=8YFLogxK |
| Idioma(s) |
eng |
| Direitos |
info:eu-repo/semantics/restrictedAccess |
| Fonte |
Paun , C , Stere , C , Coman , S M , Parvulescu , V I , Goodrich , P & Hardacre , C 2008 , ' Acylation of sulfonamines using silica grafted 1-butyl-3-(3-triethoxysilylpropyl)-4,5-dihydroimidazolium ionic liquids as catalysts ' Catalysis Today , vol 131 (1-4) , no. 1-4 , pp. 98-103 . DOI: 10.1016/j.cattod.2007.10.028 |
| Palavras-Chave | #/dk/atira/pure/subjectarea/asjc/1500/1503 #Catalysis #/dk/atira/pure/subjectarea/asjc/1500/1508 #Process Chemistry and Technology |
| Tipo |
article |
