反应详情

温度

105 °C

0.88 g of 5-chloro-1,3-dimethyl-4-nitro-1H-pyrazole (Aldrich), 1 molar equivalent of triethylamine, 1.1 molar equivalents of 3-imidazol-1-ylpropylamine and 5 ml of N,N-dimethylformamide were introduced into a 25 ml three-necked round-bottomed flask equipped with a magnetic stirrer, a thermometer and a condenser. The reaction medium was maintained at a temperature of about 105° C. for 6 hours. The solvent was evaporated off under vacuum. A black liquid was obtained, which was purified by chromatography on silica gel (ethyl acetate/methanol=4/1). 0.75 g of (2,5-dimethyl-4-nitro-2H-pyrazol-3-yl)(3-imidazol-1-yl-propyl)amine was obtained in the form of white crystals in a yield of 56.7%.

1. customequipped with a magnetic stirrer
2. customThe solvent was evaporated off under vacuum
3. customA black liquid was obtained
4. customwhich was purified by chromatography on silica gel (ethyl acetate/methanol=4/1)