Hydrochloric Acid → 1-Isobutyl-7-[4-(2-propoxyethoxy)phenyl]-2,3-dihydro-1-benzazepine-4-carboxylic acid

HRID 587038Notes

Reaction equation

HRID 587038 reaction equation
[CH2:1]([N:5]1[C:11]2[CH:12]=[CH:13][C:14]([C:16]3[CH:21]=[CH:20][C:19]([O:22][CH2:23][CH2:24][O:25][CH2:26][CH2:27][CH3:28])=[CH:18][CH:17]=3)=[CH:15][C:10]=2[CH:9]=[C:8]([C:29]([O:31]C)=[O:30])[CH2:7][CH2:6]1)[CH:2]([CH3:4])[CH3:3].[OH-].[Na+].Cl>C1COCC1.CO>[CH2:1]([N:5]1[C:11]2[CH:12]=[CH:13][C:14]([C:16]3[CH:17]=[CH:18][C:19]([O:22][CH2:23][CH2:24][O:25][CH2:26][CH2:27][CH3:28])=[CH:20][CH:21]=3)=[CH:15][C:10]=2[CH:9]=[C:8]([C:29]([OH:31])=[O:30])[CH2:7][CH2:6]1)[CH:2]([CH3:4])[CH3:3]

Participants

6

Reactant 3

HCID 313Hydrochloric AcidHCID 14798Sodium HydroxideHCID 22329296Methyl 1-isobutyl-7-[4-(2-propoxyethoxy)phenyl]-2,3-dihydro-1-benzazepine-4-carboxylate

Product 1

HCID 223292601-Isobutyl-7-[4-(2-propoxyethoxy)phenyl]-2,3-dihydro-1-benzazepine-4-carboxylic acidYield 74.5%

Reagents, catalysts & solvents 2

HCID 887MethanolSolventHCID 8028TetrahydrofuranSolvent

Procedure

In THF (15.8 ml)/methanol (15.8 ml) was dissolved methyl 1-isobutyl-7-[4-(2-propoxyethoxy)phenyl]-2,3-dihydro-1-benzazepine-4-carboxylate (0.79 g). To the solution was added 1N sodium hydroxide solution (7.9 ml) and the mixture was stirred at room temperature for 20 hours. pH was adjusted to approximate 4 with 1N hydrochloric acid, and the solvent was concentrated to half under reduced pressure. The concentrated material was extracted with ethyl acetate, and the extract was washed with saturated brine and dried with magnesium sulfate. The solvent was removed under reduced pressure, and the resulting residue was washed With hexane/ethyl acetate (=6/1) to give 1-isobutyl-7-[4-(2-propoxyethoxy)phenyl]-2,3-dihydro-1-benzazepine-4-carboxylic acid (0.57 g).

Workup

  1. concentrationthe solvent was concentrated to half under reduced pressure
  2. extractionThe concentrated material was extracted with ethyl acetate
  3. washthe extract was washed with saturated brine
  4. dry with materialdried with magnesium sulfate
  5. customThe solvent was removed under reduced pressure
  6. washthe resulting residue was washed With hexane/ethyl acetate (=6/1)

Sources & evidence

ORD record
ord-3a7b20e474ed45bdb5e3282a3463ca40
Source dataset
uspto-grants-2005_08
Patent number
US06936602B1

Reaction notes

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