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

Participants

Reaction Steps

To a solution of N-[3-(2-hydroxyethoxy)-1-methyl-4-(4-methylphenyl)-1H-pyrazol-5-yl]-5-isopropyl-2-pyridinesulfonamide (Example 40) (1.00 g) in anhydrous THF (10 ml) at 0° C. and under an atmosphere of nitrogen was added sodium hydride (60% dispersion in oil, 195 mg) and the mixture was stirred for 5 minutes. To the mixture was added 5-bromo-2-chloropyrimidine (Liquid Crystals, 1993, 14(3), 741) (1.12 g) in dimethylacetamide (3 ml). After stirring for 1 hr, the reaction mixture was partitioned between ethyl acetate (100 ml) and saturated ammonium chloride solution (100 ml). The organic fraction was washed with brine (100 ml), followed by drying over magnesium sulfate, filtering and concentration under reduced pressure. Purification of the residue by preparative HPLC on a Phenomenex Magellen column using a 0.1M ammonium acetate acetonitrile gradient (95:5 to 50:50 over 5 minutes) afforded the title compound as a white solid (625 mg).

Provenance & Evidence