反应详情

Sodium (13.5 g.) was added over 3 hours to propane-1,3-diol (450 ml.) under nitrogen at 70° with stirring. This solution was added over 20 minutes to a stirred solution of 4-chloromethylimidazole hydrochloride (50.0 g.) under nitrogen at 40°-60°. Subsequent heating at 60°-65° for 3 hours followed by overnight cooling, filtration and concentration gave 4-(3-hydroxypropoxy)methylimidazole. Subsequent reaction with thionyl chloride gave 4-(3-chloropropoxy)methylimidazole hydrochloride (38.3 g.). (ii) The reaction of this chloride (36.2 g.) with sodium azide (22.4 g.) in dry dimethylformamide at 95° for 3 hours followed by `dry-column` chromatography on aluminium with ethanol as eluant gave 4-(3-azidopropoxy)methylimidazole which was further purified by the same method using chloroform as eluant. The azide (2.95 g.) in ethanol (200 ml.) was hydrogenated over platinum oxide catalyst to give 4-(3-aminopropoxy)methylimidazole (2.42 g.).

1. temperatureSubsequent heating at 60°-65° for 3 hours
2. temperaturecooling
3. filtrationfiltration and concentration