Hydrochloric Acid → 3,3-Dimethyl-2-[3-(4-o-tolyl-piperazin-1-yl)-phenyl]-1,2,3,4-tetrahydro-quinoline-8-carboxylic acid

HRID 2045368Notes

Reaction equation

HRID 2045368 reaction equation
C[O:2][C:3]([C:5]1[CH:6]=[CH:7][CH:8]=[C:9]2[C:14]=1[NH:13][CH:12]([C:15]1[CH:20]=[CH:19][CH:18]=[C:17]([N:21]3[CH2:26][CH2:25][N:24]([C:27]4[CH:32]=[CH:31][CH:30]=[CH:29][C:28]=4[CH3:33])[CH2:23][CH2:22]3)[CH:16]=1)[C:11]([CH3:35])([CH3:34])[CH2:10]2)=[O:4].O.[OH-].[Li+].O.Cl>CO.O1CCCC1>[CH3:34][C:11]1([CH3:35])[CH2:10][C:9]2[C:14](=[C:5]([C:3]([OH:4])=[O:2])[CH:6]=[CH:7][CH:8]=2)[NH:13][CH:12]1[C:15]1[CH:20]=[CH:19][CH:18]=[C:17]([N:21]2[CH2:26][CH2:25][N:24]([C:27]3[CH:32]=[CH:31][CH:30]=[CH:29][C:28]=3[CH3:33])[CH2:23][CH2:22]2)[CH:16]=1

Participants

7

Reactant 4

HCID 313Hydrochloric AcidHCID 962WaterHCID 168937Lithium hydroxide, monohydrateHCID 674428223,3-Dimethyl-2-[3-(4-o-tolyl-piperazin-1-yl)-phenyl]-1,2,3,4-tetrahydro-quinoline-8-carboxylic acid methyl ester

Product 1

HCID 534920403,3-Dimethyl-2-[3-(4-o-tolyl-piperazin-1-yl)-phenyl]-1,2,3,4-tetrahydro-quinoline-8-carboxylic acidYield 31.4%

Reagents, catalysts & solvents 2

HCID 887MethanolSolventHCID 8028TetrahydrofuranSolvent

Conditions

Temperature
60 °C

Procedure

A mixture of 3,3-dimethyl-2-[3-(4-o-tolyl-piperazin-1-yl)-phenyl]-1,2,3,4-tetrahydro-quinoline-8-carboxylic acid methyl ester (0.10 g, 0.21 mmol), lithium hydroxide hydrate (88 mg, 2.1 mmol), water (0.5 mL) in methanol (1 mL) and tetrahydrofuran (5 mL) was stirred at 60° C. for 12 h. The mixture was neutralized with a 3N aqueous hydrochloric acid solution and extracted with ethyl acetate (2×20 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 3,3-dimethyl-2-[3-(4-o-tolyl-piperazin-1-yl)-phenyl]-1,2,3,4-tetrahydro-quinoline-8-carboxylic acid (30 mg, 31%) as a white solid: LC/MS m/e calcd for C29H33N3O2 (M+H)+: 456.6, observed: 456.3.

Workup

  1. extractionextracted with ethyl acetate (2×20 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-1621687c14f8458a8faee56581e0eb6c
Source dataset
uspto-grants-2013_11
Patent number
US08586747B2

Reaction notes

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