反应详情

(4-Chloro-phenyl)-[2-(3,5-dimethyl-pyrazol-1-yl)-9-methyl-9H-purin-6-yl]-amine (520 mg, 1.5 mmol) was dissolved in N,N-dimethylformamide (5 mL). Sodium hydride (60% in mineral oil, 90 mg, 2.2 mmol) was added and mixture was stirred at room temperature for 30 minutes. 2-Methoxyethyl chloroformate (0.26 mL, 2.2 mmol) was added and stirring was continued at room temperature over night. Water was added and the aqueous phase was extracted twice with ethyl acetate. The combined organic phases were dried over magnesium sulphate, filtrated and concentrated in vacuo. The crude product was purified by flash chromatography (ethyl acetate/methanol as eluent) to give (4-chloro-phenyl)-[2-(3,5-dimethyl-pyrazol-1-yl)-9-methyl-9H-purin-6-yl]-carbamic acid 2-methoxy-ethyl ester (280 mg, 42%) as a white solid.

1. stirringstirring
2. waitwas continued at room temperature over night
3. extractionthe aqueous phase was extracted twice with ethyl acetate
4. dry with materialThe combined organic phases were dried over magnesium sulphate
5. filtrationfiltrated
6. concentrationconcentrated in vacuo
7. customThe crude product was purified by flash chromatography (ethyl acetate/methanol as eluent)