Sodium Hydroxide → 3-chloro-4-[N'-(2-methylphenyl)ureido]phenylacetic acid
反応式
[Cl:1][C:2]1[CH:3]=[C:4]([CH2:19][C:20]([O:22]C)=[O:21])[CH:5]=[CH:6][C:7]=1[NH:8][C:9]([NH:11][C:12]1[CH:17]=[CH:16][CH:15]=[CH:14][C:13]=1[CH3:18])=[O:10].[OH-].[Na+]>C1COCC1>[Cl:1][C:2]1[CH:3]=[C:4]([CH2:19][C:20]([OH:22])=[O:21])[CH:5]=[CH:6][C:7]=1[NH:8][C:9]([NH:11][C:12]1[CH:17]=[CH:16][CH:15]=[CH:14][C:13]=1[CH3:18])=[O:10]参加物
4
実験手順
To a stirred solution of methyl 3-chloro-4-[N′-(2-methylphenyl)ureido]phenylacetate (1.23 g, 3.70 mmol) in THF (30 ml) was added 0.25 N NaOH (30 ml). After stirring at room temperature for 14 h, the solvent was concentrated in vacuo. The residue was triturated by the addition of 1 N HCl and dried over 60° C. for 2 days under a reduced pressure to give 3-chloro-4-[N′-(2-methylphenyl) ureido]phenylacetic acid (1.22 g, 100%) as colorless powder. 1H-NMR (DMSO-d6) δ .26 (s, 3H), 3.40 (s, 2H), 6.95 (t, J=7.3 Hz, 1H), 7.11 (d, J=7.6 Hz, 2H), 7.16 (d, J=7.3 Hz, 1H), 7.32 (s, 1H), 7.76 (d, J=8.0 Hz, 1H), 7.94 (dd, J=9.3, 1.0 Hz, 1H), 8.72 (s, 2H); MS (ESI) m/z 319 (M++1), 321 (M++3), 341 (M++Na).