Acetic Acid → 3-[5-(5-{5-Chloro-6-[(1-methylethyl)oxy]-3-pyridinyl}-1,2,4-oxadiazol-3-yl)-1H-indazol-1-yl]-2,2-dimethylpropanoic acid

HRID 2189820Notes

Reaction equation

[Cl:1][C:2]1[CH:3]=[C:4]([C:12]2[O:16][N:15]=[C:14]([C:17]3[CH:18]=[C:19]4[C:23](=[CH:24][CH:25]=3)[N:22]([CH2:26][C:27]([CH3:34])([CH3:33])[C:28]([O:30]CC)=[O:29])[N:21]=[CH:20]4)[N:13]=2)[CH:5]=[N:6][C:7]=1[O:8][CH:9]([CH3:11])[CH3:10].[OH-].[Na+].C(O)(=O)C>C(O)C.O>[Cl:1][C:2]1[CH:3]=[C:4]([C:12]2[O:16][N:15]=[C:14]([C:17]3[CH:18]=[C:19]4[C:23](=[CH:24][CH:25]=3)[N:22]([CH2:26][C:27]([CH3:34])([CH3:33])[C:28]([OH:30])=[O:29])[N:21]=[CH:20]4)[N:13]=2)[CH:5]=[N:6][C:7]=1[O:8][CH:9]([CH3:10])[CH3:11]

Participants

Conditions

Temperature: 80 °C

Procedure

A solution of ethyl 3-[5-(5-{5-chloro-6-[(1-methylethyl)oxy]-3-pyridinyl}-1,2,4-oxadiazol-3-yl)-1H-indazol-1-yl]-2,2-dimethylpropanoate (D111) (100 mg, 0.21 mmol) in Ethanol (2 ml) was treated with a 2M sodium hydroxide aqueous solution (1 ml) and heated at 80° C. with stirring for 4 hours. The reaction mixture was cooled to room temperature and diluted with water (5 ml). The aqueous solution was acidified with glacial acetic acid, and extracted with EtOAc (2×10 ml). The combined organic phases were dried over MgSO4 and concentrated in vacuo. Purification of the residue by MDAP gave the desired product (3 mg, 3%) as a colourless solid. MS (ES): C22H22ClN5O4 requires 455; found (MH+) 456.

Workup

temperatureThe reaction mixture was cooled to room temperature
extractionextracted with EtOAc (2×10 ml)
dry with materialThe combined organic phases were dried over MgSO4
concentrationconcentrated in vacuo
customPurification of the residue by MDAP

Sources & evidence

ORD record: ord-32893ca439c14d10bcbe558f52561cc3
Source dataset: uspto-grants-2012_12
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08324254B2

Reaction notes

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