Trifluoroacetic acid → N-[5-(3,5-Dicyano-2,6-dimethyl-1,4-dihydropyridin-4-yl)-1H-indazol-3-yl]-1-(4-fluorophenyl)-methanesulfonamide

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Reaction Steps

28 mg (0.05 mmol) tert-butyl 5-(3,5-dicyano-2,6-dimethyl-1,4-dihydropyridin-4-yl)-3-{[(4-fluoro-benzyl)sulfonyl]amino}-1H-indazole-1-carboxylate (Example 13A), dissolved in dichloromethane (1 ml), were treated with 0.042 ml (0.55 mmol) trifluoroacetic acid. The mixture was stirred at room temperature for 2 h and then concentrated under reduced pressure. The residue was dissolved in ethyl acetate and washed with saturated aqueous sodium bicarbonate solution. The organic layer was separated, dried over sodium sulfate, filtered, and concentrated under reduced pressure. The residue was purified by preparative RP-HPLC (acetonitrile/water gradient) to give 10 mg (41% of th.) of the title compound.

Provenance & Evidence