Sodium Hydroxide → 1-(3-methoxypropyl)-7-[4-(2-propoxyethoxy)phenyl]-2,3-dihydro-1H-1-benzazepine-4-carboxylic acid

HRID 587084Notes

Reaction equation

HRID 587084 reaction equation
[CH3:1][O:2][CH2:3][CH2:4][CH2:5][N:6]1[C:12]2[CH:13]=[CH:14][C:15]([C:17]3[CH:22]=[CH:21][C:20]([O:23][CH2:24][CH2:25][O:26][CH2:27][CH2:28][CH3:29])=[CH:19][CH:18]=3)=[CH:16][C:11]=2[CH:10]=[C:9]([C:30]([O:32]C)=[O:31])[CH2:8][CH2:7]1.[OH-].[Na+]>C1COCC1.CO>[CH3:1][O:2][CH2:3][CH2:4][CH2:5][N:6]1[C:12]2[CH:13]=[CH:14][C:15]([C:17]3[CH:18]=[CH:19][C:20]([O:23][CH2:24][CH2:25][O:26][CH2:27][CH2:28][CH3:29])=[CH:21][CH:22]=3)=[CH:16][C:11]=2[CH:10]=[C:9]([C:30]([OH:32])=[O:31])[CH2:8][CH2:7]1

Participants

4

Reactant 2

HCID 14798Sodium HydroxideHCID 22329044methyl 1-(3-methoxypropyl)-7-[4-(2-propoxyethoxy)phenyl]-2,3-dihydro-1H-1-benzazepine-4-carboxylate

Product 1

HCID 223289531-(3-methoxypropyl)-7-[4-(2-propoxyethoxy)phenyl]-2,3-dihydro-1H-1-benzazepine-4-carboxylic acidYield 95%

Reagents, catalysts & solvents 1

HCID 21899815MeOH tetrahydrofuranSolvent

Conditions

Temperature
50 °C

Procedure

To a solution of methyl 1-(3-methoxypropyl)-7-[4-(2-propoxyethoxy)phenyl]-2,3-dihydro-1H-1-benzazepine-4-carboxylate (376 mg) in a mixture of THF-methanol (5-10 ml) was added 1N sodium hydroxide solution (3.0 ml) at room temperature, and the mixture was stirred at 50° C. for 24 hours. After concentration under reduced pressure, 1N hydrochloric acid was added to pH 3-4, and the mixture was extracted with ethyl acetate. The organic layer was washed with saturated brine and dried with magnesium sulfate. After concentration under reduced pressure, the resulting crystals were collected by filtration. The crystals were washed with diisopropyl ether and hexane to give 1-(3-methoxypropyl)-7-[4-(2-propoxyethoxy)phenyl]-2,3-dihydro-1H-1-benzazepine-4-carboxylic acid (346 mg) as yellow crystals.

Workup

  1. concentrationAfter concentration under reduced pressure, 1N hydrochloric acid
  2. additionwas added to pH 3-4
  3. extractionthe mixture was extracted with ethyl acetate
  4. washThe organic layer was washed with saturated brine
  5. dry with materialdried with magnesium sulfate
  6. concentrationAfter concentration under reduced pressure
  7. filtrationthe resulting crystals were collected by filtration
  8. washThe crystals were washed with diisopropyl ether and hexane

Sources & evidence

ORD record
ord-67e1699df40c4affb21dd65e76b0fcfd
Source dataset
uspto-grants-2005_08
Patent number
US06936602B1

Reaction notes

Loading…