Reaction equation
C(O[CH:4](OCC)[CH2:5][N:6]([C:14]([O:16][CH2:17][CH3:18])=[O:15])[C:7]1[CH:12]=[CH:11][C:10]([Cl:13])=[CH:9][CH:8]=1)C.Cl.[OH:23][C:24]1[CH:25]=[C:26]([CH:30]=[CH:31][C:32]=1[OH:33])[CH2:27][CH2:28][NH2:29].C(O)CCC.Cl>O>[ClH:13].[CH2:17]([O:16][C:14]([N:6]([CH2:5][CH:4]1[C:30]2[C:26](=[CH:25][C:24]([OH:23])=[C:32]([OH:33])[CH:31]=2)[CH2:27][CH2:28][NH:29]1)[C:7]1[CH:8]=[CH:9][C:10]([Cl:13])=[CH:11][CH:12]=1)=[O:15])[CH3:18]Participants
Reactant 4
Product 1
Reagents, catalysts & solvents 1
Procedure
N-ethoxycarbonyl-p-chloroanilinoacetaldehyde diethyl acetal (3.0 g) and 3,4-dihydroxyphenethylamine hydrochloride (1.5 g) were added to a mixture of n-butyl alcohol (30 ml), water (5 ml) and 10% hydrochloric acid (0.5 ml), and then the mixture was refluxed for 4 hours in a stream of nitrogen. Above mentioned acetal (0.8 g) was further added to the mixture and the resultant mixture was refluxed for 4 hours. The solvent was distilled off from the reaction mixture and the residue was washed with ethyl acetate and then recrystallized from water to give 1-(N-ethoxycarbonyl-p-chloroanilinomethyl)-6,7-dihydroxy-1,2,3,4-tetrahydroisoquinoline hydrochloride, mp 208° to 210° C. and mp 214° to 215° C. Analysis: Calcd. for C19H21N2O4Cl.HCl.3/10H2O: C 54.50, H 5.44, N 6.69, Cl 16.93. Measured: C 54.29, H 5.57, N 6.70, Cl 16.69.
Workup
- temperaturethe mixture was refluxed for 4 hours in a stream of nitrogen
- additionwas further added to the mixture
- distillationThe solvent was distilled off from the reaction mixture
- washthe residue was washed with ethyl acetate
- customrecrystallized from water
Sources & evidence
- ORD record
- ord-690f05e8f4c04db7ac3665b77d3a8ce2
- Source dataset
- uspto-grants-1980_09
- Patent number
- US04220647
Linked notes
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