Sodium Hydroxide → Ethoxy[2-methyl-4-(4-methylphenyl)-5,6,7,8-tetrahydro[1]benzothieno[2,3-b]pyridin-3-yl]acetic acid

HRID 1627899Notes

Reaction equation

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

Participants

Conditions

Temperature: 60 °C

Procedure

To a solution of methyl 2-[2-methyl-4-p-tolyl-5,6,7,8-tetrahydro[1]benzothieno[2,3-b]pyridin-3-yl]-2-ethoxyacetate (0.025 g; 0.061 mmol) in methanol (0.75 mL) was added a solution of sodium hydroxide 10 N (0.075 mL; 0.750 mmol) and the mixture was heated at 60° C. for 18 h. The volatiles were removed under reduced pressure and the residue was dissolved in water, the mixture was then acidified by adding 6N HCl until a precipitate was formed. The solid was filtered, washed with water and dried under reduced pressure to furnish 0.013 g (52%) of the title compound as a white solid.

Workup

customThe volatiles were removed under reduced pressure
dissolutionthe residue was dissolved in water
additionby adding 6N HCl until a precipitate
customwas formed
filtrationThe solid was filtered
washwashed with water
customdried under reduced pressure

Sources & evidence

ORD record: ord-8b0dd76a2bdc485d93e10502ee5ba55e
Source dataset: uspto-grants-2014_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08785638B2

Reaction notes

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