Hydrochloric Acid → 3-[4-(2-Butoxyethoxy)phenyl]-10-propyl-7,8,9,10-tetrahydropyrido[2,3-b]azocine-6-carboxylic acid

HRID 1182365Notes

Reaction equation

[CH2:1]([O:5][CH2:6][CH2:7][O:8][C:9]1[CH:14]=[CH:13][C:12]([C:15]2[CH:33]=[N:32][C:18]3[N:19]([CH2:29][CH2:30][CH3:31])[CH2:20][CH2:21][CH2:22][C:23]([C:25]([O:27]C)=[O:26])=[CH:24][C:17]=3[CH:16]=2)=[CH:11][CH:10]=1)[CH2:2][CH2:3][CH3:4].[OH-].[Na+].O.Cl>C1COCC1.CO>[CH2:1]([O:5][CH2:6][CH2:7][O:8][C:9]1[CH:10]=[CH:11][C:12]([C:15]2[CH:33]=[N:32][C:18]3[N:19]([CH2:29][CH2:30][CH3:31])[CH2:20][CH2:21][CH2:22][C:23]([C:25]([OH:27])=[O:26])=[CH:24][C:17]=3[CH:16]=2)=[CH:13][CH:14]=1)[CH2:2][CH2:3][CH3:4]

Participants

Conditions

Temperature: 90 °C

Procedure

To a solution of methyl 3-[4-(2-butoxyethoxy)phenyl]-10-propyl-7,8,9,10-tetrahydropyrido[2,3-b]azocine-6-carboxylate (850 mg) in THF (30 ml) and methanol (30 ml) was added a 1 N aqueous sodium hydroxide solution (7.5 ml), and the mixture was heated at 90° C. for 3 hours. After cooling to 0° C., water was added thereto, and the mixture was neutralized with 1 N hydrochloric acid and extracted with ethyl acetate. The organic layer was washed with saturated brine, and dried over magnesium sulfate. The solvent was distilled off under reduced pressure and the resulting residue was washed with hexane to give 3-[4-(2-butoxyethoxy)phenyl]-10-propyl-7,8,9,10-tetrahydropyrido[2,3-b]azocine-6-carboxylic acid (739 mg) as yellow crystals.

Workup

temperatureAfter cooling to 0° C.
extractionextracted with ethyl acetate
washThe organic layer was washed with saturated brine
dry with materialdried over magnesium sulfate
distillationThe solvent was distilled off under reduced pressure
washthe resulting residue was washed with hexane

Sources & evidence

ORD record: ord-22857b47f0d2479d8f0aeec386ff7474
Source dataset: uspto-grants-2007_10
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07288654B2

Reaction notes

Loading…