反应详情

2-Chloro-7-cyclopentyl-7H-pyrrolo[2,3-d]pyrimidine-6-carboxylic acid (1.07 g, 4.03 mmol), HBTU (1.53 g, 4.03 mmol) and diisopropylethylamine (2 mL, 12.1 mmol) are dissolves in dimethylformamide (20 mL). 2 M solution of dimethylamine in ethanol (2.4 mL, 4.8 mmol) is added and the mixture is stirred for 30 minutes to achieve complete conversion. The reaction mixture is diluted with ethyl acetate and washed with saturated aqueous sodium hydrogen carbonate, water, then brine. The organic phase is dried (Na2SO4), filtered and concentrated. Purification by chromatography on silicagel(ethyl acetate:heptane) provides 2-Chloro-7-cyclopentyl-7H-pyrrolo[2,3-d]pyrimidine-6-carboxylic acid dimethylamide (927 mg, 79% yield) MS(ESI) m/z 293.1 (M+H)+

1. washwashed with saturated aqueous sodium hydrogen carbonate, water
2. dry with materialThe organic phase is dried (Na2SO4)
3. filtrationfiltered
4. concentrationconcentrated
5. customPurification by chromatography on silicagel(ethyl acetate:heptane)