反应详情

温度

0 °C

In a round-bottomed flask, 2-(6-chloro-1-methyl-1H-indazol-3-yl)-5-(2-trimethylsilanylethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid (3-amino-cyclopentyl)-amide hydrochloride (145 mg, 0.23 mmol) was suspended in dichloromethane (2.5 ml). The suspension was cooled to 0° C. and triethylamine (0.10 ml, 0.72 mmol) was added followed by methanesulfonyl chloride (0.02 ml, 0.26 mmol). The reaction mixture was stirred at room temperature overnight then quenched with water and extracted with dichloromethane (2×). The combined organic layers were dried over sodium sulfate, filtered and concentrated. The residue was chromatographed over silica gel with MeOH/CH2Cl2/0.5% NH4OH (gradient 0-5% MeOH) to afford 111 mg (79%) of 2-(6-chloro-1-methyl-1H-indazol-3-yl)-5-(2-trimethylsilanylethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid (3-methanesulfonylamino-cyclopentyl)-amide as a light yellow solid.

1. customthen quenched with water
2. extractionextracted with dichloromethane (2×)
3. dry with materialThe combined organic layers were dried over sodium sulfate
4. filtrationfiltered
5. concentrationconcentrated
6. customThe residue was chromatographed over silica gel with MeOH/CH2Cl2/0.5% NH4OH (gradient 0-5% MeOH)