Methanesulfonamide → HCID 57651949, compound

Participants

Reaction Steps

According to the procedures described in Tetrahedron Lett. 1998, 39, 5891 and Org. Proc. Res. Dev. 2004, 8, 952, 3-chloro-4-{5-[(2-phenyl-5-trifluoromethyl-oxazole-4-carbonyl)-amino]-pyridin-2-yl}-benzoic acid (30 mg, 0.06 mmol), methanesulfonamide (7 mg, 0.07 mmol), 4-dimethylaminopyridine (2 mg, 0.02 mmol) and 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (14 mg, 0.07 mmol) were suspended in 3 mL of dichloromethane and the mixture was refluxed for 3 h. The reaction mixture was cooled down to room temperature and filtered. The white precipitates were washed with ethyl acetate. The combined filtrate was stirred with 150 mg of Amberlyst-15 at room temperature for 2 h. The reaction was filtered to remove the resin, and the filtrate was concentrated and purified by flash chromatography (eluting with ethyl acetate and hexanes) to afford 12 mg of 2-phenyl-5-trifluoromethyl-oxazole-4-carboxylic acid [6-(2-chloro-4-methanesulfonylaminocarbonyl-phenyl)-pyridin-3-yl]-amide as a light yellow solid. LCMS calcd for C24H16ClF3N4O5S (m/e) 564, obsd 565 (M+H).

Provenance & Evidence