Sodium Hydroxide → 4-(tert-butyl)-N-[3-(2-hydroxyethoxy)-1-methyl-4-(4-methylphenyl)-1H-pyrazol-5-yl]benzenesulfonamide

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Reaction Steps

To 2-{[5-(bis {[4-(tert-butyl)phenyl]sulfonyl}amino)-1-methyl-4-(4-methylphenyl)-1H-pyrazol-3-yl]oxy}ethyl acetate (Preparation 4) (80 mg) in ethanol (20 ml) at room temperature was added 2M sodium hydroxide (2 ml) and the mixture was stirred for 16 hrs. The mixture was reduced in volume to 10 ml by rotary evaporation, diluted with water (50 ml) and extracted with ethyl acetate (2×50 ml). The organic fraction was dried over magnesium sulfate, filtered and concentrated under reduced pressure. The residue was purified by column chromatography on silica (10 g) eluted with dichloromethane to yield the title compound as a white solid (25 mg).

Provenance & Evidence