2-Imidazoline → 1H-Imidazole, 2-methyl-1-(1-methylethyl)-

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Reaction Steps

A 100-ml three-necked flask equipped with a thermometer, condenser, magnetic stirrer, and nitrogen inlet was charged with 1-isopropyl-2-methylimidazoline (50 g, 0.4 mole) and nickel-copper-chromium catalyst (5.0 g) as described in U.S. Pat. No. 3,152,998. The reaction was carried out at 200° C. with stirring and under a nitrogen atmosphere for about 5 hours. GLC analysis showed that more than 99% of the starting imidazoline had been converted to give the corresponding imidazole with 98.5% selectivity. The product was fractionally distilled under reduced pressure (80° C. at 1.2 mm Hg) to give a clear, colorless liquid in about 98% yield.

Provenance & Evidence