Water → 3-Methyl-5-bromo-2-(4-fluoro-benzenesulfonylamino)-benzoic acid

反応式

C[O:2][C:3](=[O:13])[C:4]1[CH:9]=[C:8]([Br:10])[CH:7]=[C:6]([CH3:11])[C:5]=1[NH2:12].[F:14][C:15]1[CH:20]=[CH:19][C:18]([S:21](Cl)(=[O:23])=[O:22])=[CH:17][CH:16]=1.O>N1C=CC=CC=1>[CH3:11][C:6]1[C:5]([NH:12][S:21]([C:18]2[CH:19]=[CH:20][C:15]([F:14])=[CH:16][CH:17]=2)(=[O:23])=[O:22])=[C:4]([CH:9]=[C:8]([Br:10])[CH:7]=1)[C:3]([OH:2])=[O:13]

参加物

実験手順

To a solution of 25.0 g (0.102 mol) of 2-amino-3-methyl-5-bromobenzoic acid methyl ester (U.S. Pat. No. 5,776,961) in 300 mL of pyridine was added 21.93 g (0.113 mol) of 4-fluorobenzenesulfonyl chloride. The reaction mixture was stirred for 18 h at 80°, cooled to room temperature and poured into water. The resulting mixture was extracted with ethyl acetate and the combined organics were then washed with 5% HCl solution and water. The organic layer was then dried over MgSO4, filtered and concentrated in vacuo. The residue was chromatographed on silica gel eluting with ethyl acetate/hexanes (1:3) to provide 14.53 g (39%) of the desired product as a tan solid. Electrospray Mass Spec: 388.0 (M−H)−