4-(tert-butyl)-N-(1-methyl-4-(4-methylphenyl)-3-{2-[(5-nitro-2-pyrimidinyl)oxy]ethoxy}-1H-pyrazol-5-yl)benzenesulphonamide → N-[3-{2-[(5-amino-2-pyrimidinyl)oxy]ethoxy}-1-methyl-4-(4-methylphenyl)-1H-pyrazol-5-yl]-4-(tert-butyl)benzenesulfonamide

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A solution of 4-(tert-butyl)-N-(1-methyl-4-(4-methylphenyl)-3-{2-[(5-nitro-2-pyrimidinyl)oxy]ethoxy}-1H-pyrazol-5-yl)benzenesulfonamide (Example 36) (1276 mg) in ethanol (20 ml) was placed under an atmosphere of hydrogen at 50 psi for 12 hrs using palladium on carbon (5%) as catalyst. The catalyst was filtered through Celite (30 g), and washed with ethanol (3×10 ml). Concentration of the filtrate under reduced pressure afforded a yellow residue. The crude material was purified by column chromatography on silica gel (150 g), eluting with ethyl acetate:hexane (1:1), to yield the title compound as a yellow solid (569 mg).

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