Hydrochloric Acid → 5-(4-{3-[(3-methyl-2-furoyl)amino]phenoxy}pyridin-2-yl)-1H-pyrrole-3-carboxylic acid

HRID 521779Notes

Reaction equation

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

Participants

Conditions

Temperature: 68 °C

Procedure

To a stirred solution of methyl 5-(4-{3-[(3-methyl-2-furoyl)amino]phenoxy}pyridin-2-yl)-1H-pyrrole-3-carboxylate (1.30 g, 3.12 mmol) in a mixture of solvents THF/MeOH (10 ml/10 ml) was added 2 ml of 5M NaOH (10 mmol) solution. The mixture was heated in a 68° C. bath for 8 hours, cooled to room temperature and poured into 200 ml of water. 2M HCl was added until pH=3. The resulting precipitates were filtered, washed with water, and dried in vacuo to give 5-(4-{3-[(3-methyl-2-furoyl)amino]phenoxy}pyridin-2-yl)-1H-pyrrole-3-carboxylic acid as white solid. Yield: 1.20 g, 95%.

Workup

temperaturecooled to room temperature
customThe resulting precipitates
filtrationwere filtered
washwashed with water
customdried in vacuo

Sources & evidence

ORD record: ord-aab4227c0b51450185d1ba240281526e
Source dataset: uspto-grants-2016_05
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09328103B2

Reaction notes

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