Hydrochloric Acid → 2-(3-Dimethylamino-5-fluoro-phenyl)-3,3-dimethyl-1,2,3,4-tetrahydro-quinoline-6-carboxylic acid

HRID 2045262Notes

Reaction equation

C([O:3][C:4]([C:6]1[CH:7]=[C:8]2[C:13](=[CH:14][CH:15]=1)[NH:12][CH:11]([C:16]1[CH:21]=[C:20]([F:22])[CH:19]=[C:18]([N:23]([CH3:25])[CH3:24])[CH:17]=1)[C:10]([CH3:27])([CH3:26])[CH2:9]2)=[O:5])C.O.[OH-].[Li+].O.Cl>CO.O1CCCC1>[CH3:25][N:23]([CH3:24])[C:18]1[CH:17]=[C:16]([CH:11]2[C:10]([CH3:27])([CH3:26])[CH2:9][C:8]3[C:13](=[CH:14][CH:15]=[C:6]([C:4]([OH:5])=[O:3])[CH:7]=3)[NH:12]2)[CH:21]=[C:20]([F:22])[CH:19]=1

Participants

Conditions

Temperature: 60 °C

Procedure

A mixture of 2-(3-dimethylamino-5-fluoro-phenyl)-3,3-dimethyl-1,2,3,4-tetrahydro-quinoline-6-carboxylic acid ethyl ester (0.11 g, 0.3 mmol), lithium hydroxide hydrate (0.12 g, 3.0 mmol), water (2 mL) in methanol (3 mL) and tetrahydrofuran (10 mL) was stirred at 60° C. for 12 h. The mixture was neutralized with a 3 N aqueous hydrochloric acid solution and extracted with ethyl acetate (2×50 mL), washed with water, dried over anhydrous sodium sulfate and then concentrated in vacuo to afford 2-(3-dimethylamino-5-fluoro-phenyl)-3,3-dimethyl-1,2,3,4-tetrahydro-quinoline-6-carboxylic acid (35 mg, 30%) as a white solid which was used for next step without further purification: LC/MS m/e calcd for C20H23FN2O2 (M+H)+: 343.2, observed: 343.1.

Workup

extractionextracted with ethyl acetate (2×50 mL)
washwashed with water
dry with materialdried over anhydrous sodium sulfate
concentrationconcentrated in vacuo

Sources & evidence

ORD record: ord-d9a28666c5334422a0033d49b61b23ca
Source dataset: uspto-grants-2013_11
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08586747B2

Reaction notes

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