Acetic Acid → HCID 12773908, compound

HRID 1164536Notes

Reaction equation

C(O)(=O)C.C(O[CH:8](OCC)[CH2:9][O:10][C:11]1[CH:16]=[CH:15][C:14]([S:17](=[O:20])(=[O:19])[NH2:18])=[CH:13][CH:12]=1)C.[ClH:24].[OH:25][C:26]1[CH:27]=[C:28]([CH:32]=[CH:33][C:34]=1[OH:35])[CH2:29][CH2:30][NH2:31]>Cl.O>[ClH:24].[S:17]([C:14]1[CH:13]=[CH:12][C:11]([O:10][CH2:9][CH:8]2[C:32]3[C:28](=[CH:27][C:26]([OH:25])=[C:34]([OH:35])[CH:33]=3)[CH2:29][CH2:30][NH:31]2)=[CH:16][CH:15]=1)(=[O:19])(=[O:20])[NH2:18]

Participants

Conditions

Temperature: 110 °C

Procedure

To a mixture of acetic acid (23 ml), water (6.6 ml) and concentrated hydrochloric acid (15 drops) was added (4-sulfamoylphenoxy)acetaldehyde diethyl acetal (2.3 g), and the mixture was heated for 20 minutes at 110° C. To the solution was added 3,4-dihydroxyphenethylamine hydrochloride (1.2 g), and the mixture was heated for 3.5 hours at the same temperature. After the reaction, the reaction mixture was concentrated to dryness under reduced pressure. The residue was crystallized by adding acetone, and the crystals were recrystallized from a mixed solvent of methanol and acetone to give 1-(4-sulfamoylphenoxy)methyl-6,7-dihydroxy-1,2,3,4-tetrahydroisoquinoline hydrochloride (1.8 g), mp 270° C. (dec.).

Workup

temperaturethe mixture was heated for 3.5 hours at the same temperature
customAfter the reaction
concentrationthe reaction mixture was concentrated to dryness under reduced pressure
customThe residue was crystallized
additionby adding acetone
customthe crystals were recrystallized from a mixed solvent of methanol and acetone

Sources & evidence

ORD record: ord-ea0ed0f354da4e96973316a1372b1172
Source dataset: uspto-grants-1983_01
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US04370332

Reaction notes

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