Water → 2-{[5-(3-Chlorophenyl)-3-hydroxypyridine-2-carbonyl]-amino}-2-methyl-propionic acid
Reaction equation
C[O:2][C:3](=[O:24])[C:4]([NH:7][C:8]([C:10]1[C:15]([OH:16])=[CH:14][C:13]([C:17]2[CH:22]=[CH:21][CH:20]=[C:19]([Cl:23])[CH:18]=2)=[CH:12][N:11]=1)=[O:9])([CH3:6])[CH3:5].[Li+].[OH-].O>C1COCC1>[Cl:23][C:19]1[CH:18]=[C:17]([C:13]2[CH:14]=[C:15]([OH:16])[C:10]([C:8]([NH:7][C:4]([CH3:5])([CH3:6])[C:3]([OH:24])=[O:2])=[O:9])=[N:11][CH:12]=2)[CH:22]=[CH:21][CH:20]=1Participants
Reactant 3
Product 1
Reagents, catalysts & solvents 1
Procedure
To a solution of 2-{[5-(3-chlorophenyl)-3-hydroxy-pyridine-2-carbonyl]-amino}-2-methyl-propionic acid methyl ester, 20, (0.082 g, 0.24 mmol) in THF (4 mL) is added LiOH (0.024 g, 0.98 mmol) and H2O (1 mL) and the resulting solution stirred for 3 days at room temperature. The solvent is removed under reduced pressure and the pale yellow solid that remains is then acidified with 1M HCl to until the pH is approximately 1 and the solution extracted twice with EtOAc. The combined organic layers are combined, dried (Na2SO4), filtered and concentrated under reduced pressure to afford 0.064 g (81% yield) of the desired compound as a white solid. 1H NMR (250 MHz, DMSO-d6) δ ppm 12.99 (1H, br s), 12.25 (1H, s), 9.05 (1H, s), 8.53 (1H, d, J=2.0 Hz), 7.91 (1H, s), 7.74-7.83 (2H, m), 7.51-7.58 (2H, m), 1.58 (6H, s). HPLC-MS: m/z 335 [M+H]+.
Workup
- customThe solvent is removed under reduced pressure
- extractionthe solution extracted twice with EtOAc
- dry with materialdried (Na2SO4)
- filtrationfiltered
- concentrationconcentrated under reduced pressure
Sources & evidence
- ORD record
- ord-07705c3e05294736a88f1de45b250af5
- Source dataset
- uspto-grants-2013_12
- Patent number
- US08598210B2
Reaction notes
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