Sodium Hydroxide → 7-[2-Methoxy-1-(methoxymethyl)ethoxy]-5-{[6-(methylsulfonyl)pyridin-3-yl]oxy}-1H-indole-2-carboxylic acid

HRID 1188913Notes

Reaction equation

[CH3:1][O:2][CH2:3][CH:4]([CH2:30][O:31][CH3:32])[O:5][C:6]1[CH:7]=[C:8]([O:19][C:20]2[CH:21]=[N:22][C:23]([S:26]([CH3:29])(=[O:28])=[O:27])=[CH:24][CH:25]=2)[CH:9]=[C:10]2[C:14]=1[NH:13][C:12]([C:15]([O:17]C)=[O:16])=[CH:11]2.[OH-].[Na+]>O1CCCC1.CO>[CH3:1][O:2][CH2:3][CH:4]([CH2:30][O:31][CH3:32])[O:5][C:6]1[CH:7]=[C:8]([O:19][C:20]2[CH:21]=[N:22][C:23]([S:26]([CH3:29])(=[O:28])=[O:27])=[CH:24][CH:25]=2)[CH:9]=[C:10]2[C:14]=1[NH:13][C:12]([C:15]([OH:17])=[O:16])=[CH:11]2

Participants

Conditions

Temperature: 50 °C

Procedure

To a solution of methyl 7-[2-methoxy-1-(methoxymethyl)ethoxy]-5-{[6-(methylsulfonyl)pyridin-3-yl]oxy}-1H-indole-2-carboxylate (1.79 g) in a mixture of tetrahydrofuran (20 mL) and methanol (15 mL) was added 1M aqueous sodium hydroxide solution (15 mL), and the mixture was stirred at 50° C. for 30 min. The mixture was concentrated under reduced pressure and the residue was dissolved in water. The mixture was washed with diethyl ether three times. The diethyl ether layers were combined and extracted with water. The aqueous layers were combined and 1M hydrochloric acid (15 mL) was added to the mixture. The resulting white suspension was filtered to give the title compound (1.02 g, 69%) as a pale orange solid. MS 451 (MH+).

Workup

concentrationThe mixture was concentrated under reduced pressure
dissolutionthe residue was dissolved in water
washThe mixture was washed with diethyl ether three times
extractionextracted with water
addition1M hydrochloric acid (15 mL) was added to the mixture
filtrationThe resulting white suspension was filtered

Sources & evidence

ORD record: ord-dd3975aca8fe4d59a442136936565865
Source dataset: uspto-grants-2014_03
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08673942B2

Reaction notes

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