Lithium Hydroxide → 4-(Quinoline-8-sulfonamido)benzoic acid

HRID 336127

Reaction equation

[N:1]1[C:10]2[C:5](=[CH:6][CH:7]=[CH:8][C:9]=2[S:11]([NH:14][C:15]2[CH:25]=[CH:24][C:18]([C:19]([O:21]CC)=[O:20])=[CH:17][CH:16]=2)(=[O:13])=[O:12])[CH:4]=[CH:3][CH:2]=1.[Li+].[OH-]>C1COCC1.O>[N:1]1[C:10]2[C:5](=[CH:6][CH:7]=[CH:8][C:9]=2[S:11]([NH:14][C:15]2[CH:25]=[CH:24][C:18]([C:19]([OH:21])=[O:20])=[CH:17][CH:16]=2)(=[O:13])=[O:12])[CH:4]=[CH:3][CH:2]=1

Participants

Conditions

Temperature: 80 °C

Procedure

To a solution of sulfonamide VII (34 gm, 95.5 mmol) in THF and water (1:1), LiOH (20 gm, 47.66 mmol) was added and the resulting mixture was allowed to stir at 80° C. overnight. After completion of reaction, the crude mixture was washed with EtOAc. The aqueous layer was acidified with citric acid and filtered. Thus obtained solid was washed with Et2O and azeotroped by toluene, under reduced pressure to afford acid VIII (30 gm, 95.8% yield) which was taken forward for the next step without further purification.

Workup

customAfter completion of reaction
washthe crude mixture was washed with EtOAc
filtrationfiltered
washThus obtained solid was washed with Et2O
customazeotroped by toluene, under reduced pressure

Sources & evidence

ORD record: ord-8e07ec9c3a594b2fa1f7bc84678156d0
Source dataset: uspto-grants-2014_11
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08889667B2

Linked notes

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