Hydrochloric Acid → 2-[5-(4-Tert-butyl-phenyl)-pyridin-3-yl]-3,3-dimethyl-1,2,3,4-tetrahydro-quinoline-6-carboxylic acid

HRID 1800968Notes

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:17]=[N:18][CH:19]=[C:20]([C:22]3[CH:27]=[CH:26][C:25]([C:28]([CH3:31])([CH3:30])[CH3:29])=[CH:24][CH:23]=3)[CH:21]=1)[C:10]([CH3:33])([CH3:32])[CH2:9]2)=[O:5])C.Cl>CO.O1CCCC1.[OH-].[Na+].O>[C:28]([C:25]1[CH:24]=[CH:23][C:22]([C:20]2[CH:21]=[C:16]([CH:11]3[C:10]([CH3:33])([CH3:32])[CH2:9][C:8]4[C:13](=[CH:14][CH:15]=[C:6]([C:4]([OH:5])=[O:3])[CH:7]=4)[NH:12]3)[CH:17]=[N:18][CH:19]=2)=[CH:27][CH:26]=1)([CH3:31])([CH3:29])[CH3:30]

Participants

Conditions

Temperature: 60 °C

Procedure

A mixture of 2-[5-(4-tert-butyl-phenyl)-pyridin-3-yl]-3,3-dimethyl-1,2,3,4-tetrahydro-quinoline-6-carboxylic acid ethyl ester (880 mg, 1.99 mmol) in methanol (20 mL) and tetrahydrofuran (20 mL), 30% sodium hydroxide in water (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 (2×100 mL), washed with water, dried over anhydrous sodium sulfate and then concentrated in vacuo. The residue was re-crystallized from methanol to afford 2-[5-(4-tert-butyl-phenyl)-pyridin-3-yl]-3,3-dimethyl-1,2,3,4-tetrahydro-quinoline-6-carboxylic acid (800 mg, 97%) as a yellow solid: LC/MS m/e calcd for C27H30N2O2 (M+H)+: 415.55, observed: 415.1.

Workup

extractionextracted with ethyl acetate (2×100 mL)
washwashed with water
dry with materialdried over anhydrous sodium sulfate
concentrationconcentrated in vacuo
customThe residue was re-crystallized from methanol

Sources & evidence

ORD record: ord-43eee7c01943488c85d21d728012153d
Source dataset: uspto-grants-2013_01
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08344137B2

Reaction notes

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