Journal
CATALYSIS COMMUNICATIONS
Volume 9, Issue 6, Pages 1153-1161Publisher
ELSEVIER
DOI: 10.1016/j.catcom.2007.10.026
Keywords
oxazoline; imidazoline; thiazoline; nitrile; tungstophosphoric acid
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A convenient and green method for the synthesis of aromatic 2-oxazolines, 2-imidazolines and 2-thiazolines using tungstophosphoric acid (TPA), a commercially available, stable and reusable catalyst, from the reaction of aromatic nitriles and 2-aminoalcohols, ethylenediamine or 2-aminoethanethiol under solvent-free conditions is reported. It is noteworthy that this procedure could be used for selective synthesis of mono- and bis-oxazolines and imidazolines from dicyanobenzene. In three cases the catalyst could be reused several times without significant loss of its catalytic activity. (C) 2007 Elsevier B.V. All rights reserved.
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