反应详情

温度

0 °C

Add sodium hydride (257 mg, 6.43 mmol, 60% dispersion in mineral oil) at 0° C. to a solution of 2-chloro-6-methanesulfonylamino-isonicotinic acid methyl ester (1.31 g, 4.95 mmol) in DMF (10 mL). After stirring at 0° C. for 15 min, add iodomethane (0.4 mL, 6.43 mmol). Stir the reaction at 0° C. for 1 h and at room temperature for 2 h. Quench the reaction with ice and extract the reaction mixture with ethyl acetate. Wash the organic layer with saturated aqueous sodium chloride, dry (sodium sulfate), concentrate and purify (silica gel chromatography, eluting with 30:70 ethyl acetate:hexanes) to give the title compound (1.0 g,72%).

1. stirringStir
2. customthe reaction at 0° C. for 1 h
3. waitat room temperature for 2 h
4. customQuench
5. customthe reaction with ice
6. extractionextract the reaction mixture with ethyl acetate
7. washWash the organic layer with saturated aqueous sodium chloride
8. dry with materialdry (sodium sulfate)
9. concentrationconcentrate
10. custompurify
11. wash(silica gel chromatography, eluting with 30:70 ethyl acetate:hexanes)