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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...
A practical, efficient and inexpensive method for the synthesis of 2-oxazolines and 2-imidazoline from the reaction of nitriles with β-aminoalcohols and ethylenediamine (EDA), respectively, using silica sulfuric acid as a heterogeneous catalyst under reflux conditions is reported. This catalyst can be successfully applied for the chemoselective conversion of dicyanobenzenes to their corresponding...
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