Hydrochloric Acid → 3,3-Dimethyl-2-(5-morpholin-4-yl-pyridin-3-yl)-1,2,3,4-tetrahydro-quinoline-6-carboxylic acid

HRID 1801150Notes

Reaction equation

HRID 1801150 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]([N:22]3[CH2:27][CH2:26][O:25][CH2:24][CH2:23]3)[CH:21]=1)[C:10]([CH3:29])([CH3:28])[CH2:9]2)=[O:5])C.[OH-].[Na+].Cl>CO.O1CCCC1.O>[CH3:28][C:10]1([CH3:29])[CH2:9][C:8]2[C:13](=[CH:14][CH:15]=[C:6]([C:4]([OH:5])=[O:3])[CH:7]=2)[NH:12][CH:11]1[C:16]1[CH:17]=[N:18][CH:19]=[C:20]([N:22]2[CH2:23][CH2:24][O:25][CH2:26][CH2:27]2)[CH:21]=1

Participants

7

Reactant 3

HCID 313Hydrochloric AcidHCID 14798Sodium HydroxideHCID 67442022HCID 67442022, compound

Product 1

HCID 674435563,3-Dimethyl-2-(5-morpholin-4-yl-pyridin-3-yl)-1,2,3,4-tetrahydro-quinoline-6-carboxylic acidYield 90%

Reagents, catalysts & solvents 3

HCID 887MethanolSolventHCID 962WaterSolventHCID 8028TetrahydrofuranSolvent

Conditions

Temperature
70 °C

Procedure

To a stirred mixture solution of 3,3-dimethyl-2-(5-morpholin-4-yl-pyridin-3-yl)-1,2,3,4-tetrahydro-quinoline-6-carboxylic acid ethyl ester (2.5 g, 6.5 mmol) in methanol (15.0 mL) and tetrahydrofuran (16.0 mL) was added 50% sodium hydroxide in water (2.0 mL). The reaction mixture was stirred at 70° C. for 6 hours. 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. Purification by Waters automated flash system (column: Xterra 30 mm×100 mm, sample manager 2767, pump 2525, detector: ZQ mass and UV 2487, solvent system: acetonitrile and 0.1% ammonium hydroxide in water) afforded 3,3-dimethyl-2-(5-morpholin-4-yl-pyridin-3-yl)-1,2,3,4-tetrahydro-quinoline-6-carboxylic acid (2.1 g, 90%) as a white solid: LC/MS m/e calcd for C21H25N3O3 (M+H)+: 368.45, observed: 368.1.

Workup

  1. extractionextracted with ethyl acetate (2×100 mL)
  2. washwashed with water
  3. dry with materialdried over anhydrous sodium sulfate
  4. concentrationconcentrated in vacuo
  5. customPurification by Waters automated flash system (column: Xterra 30 mm×100 mm, sample manager 2767, pump 2525, detector: ZQ mass and UV 2487, solvent system: acetonitrile and 0.1% ammonium hydroxide in water)

Sources & evidence

ORD record
ord-0e39370d436d428095f87c5417d5bd86
Source dataset
uspto-grants-2013_01
Patent number
US08344137B2

Reaction notes

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