3,5-Dimethylpyrazole → NS13001

Participants

Reaction Conditions

Reaction Steps

Sodium hydride (60% in mineral oil, 160 mg, 4.1 mmol) was added to 3,5-dimethylpyrazole (320 mg, 3.4 mmol) dissolved N,N-dimethylformamide (10 mL) and the mixture was stirred for 30 min. (2-Chloro-9-methyl-9H-purin-6-yl)-(4-chloro-phenyl)amine (1.0 g 3.40 mmol) was added and the reaction mixture was heated at 120° C. for 4 days, cooled down and poured into water. The aqueous phase was extracted with ethyl acetate. The combined organic phases were dried over magnesium sulphate, filtered and concentrated in vacuo. The crude product was purified by flash chromatography (dichloromethane/methanol/ammonia) to give (4-chloro-phenyl)-[2-(3,5-dimethyl-pyrazol-1-yl)-9-methyl-9H-purin-6-yl]-amine (160 mg, 13%) as a yellow crystalline compound.

Provenance & Evidence