反应详情

To N-[3-(2-hydroxyethoxy)-1-methyl-4-(4-methylphenyl)-1H-pyrazol-5-yl]-2-pyridine sulphonamide (Example 52) (200 mg) in dry tetrahydrofuran (2 ml) at room temperature was added sodium hydride (80% dispersion in oil, 35 mg) the mixture was stirred for 10 minutes. A solution of 5-chloro-2-methylsulphonylpyrimidine (134 mg) in dry tetrahydrofuran (2.5 ml) was then added and the mixture was stirred for a further 4 hours. The mixture was stirred for 4 hours. The reaction was treated with water (50 ml) and extracted with ethyl acetate (50 ml). The aqueous phase was neutralised to pH 7 with 2N hydrochloric acid (aq.). The organic fraction was washed with brine (50 ml), dried over magnesium sulfate, filtered and concentrated under reduced pressure. The residue was purified by column chromatography on silica (10 g) eluted with a solvent gradient of pentane:ethyl acetate (1:1 to 0:1) to yield the tile compound as a colourless foam (120 mg).

1. stirringthe mixture was stirred for a further 4 hours
2. stirringThe mixture was stirred for 4 hours
3. extractionextracted with ethyl acetate (50 ml)
4. washThe organic fraction was washed with brine (50 ml)
5. dry with materialdried over magnesium sulfate
6. filtrationfiltered
7. concentrationconcentrated under reduced pressure
8. customThe residue was purified by column chromatography on silica (10 g)
9. washeluted with a solvent gradient of pentane:ethyl acetate (1:1 to 0:1)