Acylation of sulfonamines using silica grafted 1-butyl-3-(3-triethoxysilylpropyl)-4,5-dihydroimidazolium ionic liquids as catalysts

C. Paun, C. Stere, S.M. Coman, V.I. Parvulescu, Peter Goodrich, Christopher Hardacre

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

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.
Original languageEnglish
Pages (from-to)98-103
Number of pages6
JournalCatalysis Today
Volume131 (1-4)
Issue number1-4
DOIs
Publication statusPublished - 29 Feb 2008

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

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