Sodium hydride → N-[3-{2-[(5-bromo-2-pyrimidinyl)oxy]ethoxy}-1-methyl-4-(4-methylphenyl)-1H-pyrazol-5-yl]4-(tert-pentyl)benzenesulfonamide

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Reaction Steps

To N-[3-(2-hydroxyethoxy)-1-methyl-4-(4-methylphenyl)-1H-pyrazol-5-yl]-4-(tert-pentyl)benzenesulfonamide (Example 8) (270 mg) in tetrahydrofuran (4 ml) at room temperature under an atmosphere of nitrogen was added sodium hydride (60% dispersion in oil, 50 mg) and the mixture was stirred for 1 minute. To the mixture was added dimethyl acetamide (0.5 ml) followed by 5-bromo-2-chloropyrimidine (171 mg) The mixture was stirred for 2 hours at room temperature and then diluted with water (20 ml) and extracted with ether (2×20 ml). The organic fractions were combined, dried over magnesium sulfate, filtered and concentrated under reduced pressure. The residue was purified by column chromatography on silica (35 g) eluted with hexane:ethyl acetate (2:1 to 1:2) to yield the title compound as an orange oil (292 mg).

Provenance & Evidence