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Hydrochloric Acid → 3-[6-(5-{5-fluoro-6-[(1-methylethyl)oxy]-3-pyridinyl}-1,2,4-oxadiazol-3-yl)-1H-indol-3-yl]propanoic acid

HRID 1512938
Notes
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Reaction equation

HRID 1512938 reaction equation
[OH-].[Na+].[F:3][C:4]1[CH:5]=[C:6]([C:14]2[O:18][N:17]=[C:16]([C:19]3[CH:27]=[C:26]4[C:22]([C:23]([CH2:28][CH2:29][C:30]([O:32]CC)=[O:31])=[CH:24][NH:25]4)=[CH:21][CH:20]=3)[N:15]=2)[CH:7]=[N:8][C:9]=1[O:10][CH:11]([CH3:13])[CH3:12].Cl>CC(O)C.O>[F:3][C:4]1[CH:5]=[C:6]([C:14]2[O:18][N:17]=[C:16]([C:19]3[CH:27]=[C:26]4[C:22]([C:23]([CH2:28][CH2:29][C:30]([OH:32])=[O:31])=[CH:24][NH:25]4)=[CH:21][CH:20]=3)[N:15]=2)[CH:7]=[N:8][C:9]=1[O:10][CH:11]([CH3:13])[CH3:12]
ParticipantsConditionsProcedureWorkupSources & evidenceReaction notes

Participants

6

Reactant 3

HCID 313Hydrochloric AcidHCID 14798Sodium HydroxideHCID 59146084Ethyl 3-[6-(5-{5-fluoro-6-[(1-methylethyl)oxy]-3-pyridinyl}-1,2,4-oxadiazol-3-yl)-1H-indol-3-yl]propanoate

Product 1

HCID 445470193-[6-(5-{5-fluoro-6-[(1-methylethyl)oxy]-3-pyridinyl}-1,2,4-oxadiazol-3-yl)-1H-indol-3-yl]propanoic acidYield 21.4%

Reagents, catalysts & solvents 2

HCID 962
Water
Solvent
HCID 3776IsopropanolSolvent

Conditions

Temperature
70 °C

Procedure

Sodium hydroxide (8 mg) was added to a solution of ethyl 3-[6-(5-{5-fluoro-6-[(1-methylethyl)oxy]-3-pyridinyl}-1,2,4-oxadiazol-3-yl)-1H-indol-3-yl]propanoate (D110) (60 mg) in iPrOH (5 mL) and water (5 mL). The resulting mixture was heated at 70° C. for 40 mins. Then 0.5 M HCl solution 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-[6-(5-{5-fluoro-6-[(1-methylethyl)oxy]-3-pyridinyl}-1,2,4-oxadiazol-3-yl)-1H-indol-3-yl]propanoic acid (E84) (12 mg) as a white solid. δH (DMSO-d6, 400 MHz): 1.39 (6H, d), 2.61 (2H, t), 2.96 (2H, t), 5.47 (1H, m), 7.35 (1H, d), 7.72 (2H, d), 8.11 (1H, t), 8.37 (1H, dd), 8.81 (1H, d), 11.23 (1H, d), 12.11 (1H, br s). MS (ES): C21H19FN4O4 requires 410; found 411.2 (M+H+).

Workup

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

Sources & evidence

ORD record
ord-d721ecee88af4ab8bdedc01ad8226f27
Source dataset
uspto-grants-2012_07
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US08217028B2

Reaction notes

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On this pageParticipantsConditionsProcedureWorkupSources & evidenceReaction notes