Hydrochloric Acid → 3-[7-(5-{3-Chloro-4-[(1-methylethyl)oxy]phenyl}-1,2,4-oxadiazol-3-yl)-4-fluoro-1H-indol-3-yl]propanoic acid

HRID 1512878Notes

Reaction equation

[OH-].[Na+].[Cl:3][C:4]1[CH:5]=[C:6]([C:14]2[O:18][N:17]=[C:16]([C:19]3[CH:20]=[CH:21][C:22]([F:35])=[C:23]4[C:27]=3[NH:26][CH:25]=[C:24]4[CH2:28][CH2:29][C:30]([O:32]CC)=[O:31])[N:15]=2)[CH:7]=[CH:8][C:9]=1[O:10][CH:11]([CH3:13])[CH3:12].Cl>C1COCC1.O>[Cl:3][C:4]1[CH:5]=[C:6]([C:14]2[O:18][N:17]=[C:16]([C:19]3[CH:20]=[CH:21][C:22]([F:35])=[C:23]4[C:27]=3[NH:26][CH:25]=[C:24]4[CH2:28][CH2:29][C:30]([OH:32])=[O:31])[N:15]=2)[CH:7]=[CH:8][C:9]=1[O:10][CH:11]([CH3:13])[CH3:12]

Participants

Conditions

Temperature: 90 °C

Procedure

Sodium hydroxide (25 mg) was added to a solution of ethyl 3-[7-(5-{3-chloro-4-[(1-methylethyl)oxy]phenyl}-1,2,4-oxadiazol-3-yl)-4-fluoro-1H-indol-3-yl]propanoate (D46) (204 mg) in THF (3 mL) and water (3 mL). The reaction mixture was stirred at 90° C. for 1 hour. Then 0.5 M HCl was added until pH was about 6. The solvent was concentrated, and the residue was dissolved in water. The precipitated solid was purified by Mass Directed Auto Prep to afford 3-[7-(5-{3-chloro-4-[(1-methylethyl)oxy]phenyl}-1,2,4-oxadiazol-3-yl)-4-fluoro-1H-indol-3-yl]propanoic acid (E19) (127 mg) as a white needle crystal. δH (DMSO-d6, 400 MHz): 1.36 (6H, d), 2.62 (2H, t), 3.06 (2H, t), 4.89 (1H, m), 6.98 (1H, dd), 7.25 (1H, d), 7.45 (1H, d), 7.91 (1H, dd), 8.19 (1H, dd), 8.35 (1H, d), 11.10 (1H, s), 12.14 (1H, br s). δF (DMSO-d6, 376 MHz): −118.9. MS (ES): C22H19ClFN3O4 requires 443; found 444.1 (M+H+).

Workup

concentrationThe solvent was concentrated
dissolutionthe residue was dissolved in water
customThe precipitated solid was purified by Mass Directed Auto Prep

Sources & evidence

ORD record: ord-f205d7dd167d45df943b7de97621a5bd
Source dataset: uspto-grants-2012_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08217028B2

Reaction notes

Loading…