Hydrochloric Acid → 2-{3-[4-(2,4-Dimethyl-phenyl)-piperazin-1-yl]-phenyl}-3,3-dimethyl-1,2,3,4-tetrahydro-quinoline-6-carboxylic acid

HRID 2045358Notes

Reaction equation

HRID 2045358 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]=[CH:20][CH:19]=[C:18]([N:22]3[CH2:27][CH2:26][N:25]([C:28]4[CH:33]=[CH:32][C:31]([CH3:34])=[CH:30][C:29]=4[CH3:35])[CH2:24][CH2:23]3)[CH:17]=1)[C:10]([CH3:37])([CH3:36])[CH2:9]2)=[O:5])C.O.[OH-].[Li+].O.Cl>CO.O1CCCC1>[CH3:35][C:29]1[CH:30]=[C:31]([CH3:34])[CH:32]=[CH:33][C:28]=1[N:25]1[CH2:26][CH2:27][N:22]([C:18]2[CH:17]=[C:16]([CH:11]3[C:10]([CH3:37])([CH3:36])[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:21]=[CH:20][CH:19]=2)[CH2:23][CH2:24]1

Participants

7

Reactant 4

HCID 313Hydrochloric AcidHCID 962WaterHCID 168937Lithium hydroxide, monohydrateHCID 674412112-{3-[4-(2,4-Dimethyl-phenyl)-piperazin-1-yl]-phenyl}-3,3-dimethyl-1,2,3,4-tetrahydro-quinoline-6-carboxylic acid ethyl ester

Product 1

HCID 534920362-{3-[4-(2,4-Dimethyl-phenyl)-piperazin-1-yl]-phenyl}-3,3-dimethyl-1,2,3,4-tetrahydro-quinoline-6-carboxylic acidYield 80%

Reagents, catalysts & solvents 2

HCID 887MethanolSolventHCID 8028TetrahydrofuranSolvent

Conditions

Temperature
60 °C

Procedure

A mixture of 2-{3-[4-(2,4-dimethyl-phenyl)-piperazin-1-yl]-phenyl}-3,3-dimethyl-1,2,3,4-tetrahydro-quinoline-6-carboxylic acid ethyl ester (0.20 g, 0.40 mmol), lithium hydroxide hydrate (167 mg, 4.0 mmol), water (0.5 mL) in methanol (1 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 an oil residue. 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% formic acid in water) afforded 2-{3-[4-(2,4-dimethyl-phenyl)-piperazin-1-yl]-phenyl}-3,3-dimethyl-1,2,3,4-tetrahydro-quinoline-6-carboxylic acid (150 mg, 80%) as a white solid: LC/MS m/e calcd for C30H35N3O2 (M+H)+: 470.6, observed: 470.4.

Workup

  1. extractionextracted with ethyl acetate (2×50 mL)
  2. washwashed with water
  3. dry with materialdried over anhydrous sodium sulfate
  4. concentrationconcentrated in vacuo
  5. customto afford an oil residue
  6. 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% formic acid in water)

Sources & evidence

ORD record
ord-d25a5b8123f84214b34d86e4d3c022b8
Source dataset
uspto-grants-2013_11
Patent number
US08586747B2

Reaction notes

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