3,4-Dimethylphenol → 6,7-Dimethoxy-4-(3,4-dimethylphenoxy)quinoline

HRID 228523

Reaction equation

Cl[C:2]1[C:11]2[C:6](=[CH:7][C:8]([O:14][CH3:15])=[C:9]([O:12][CH3:13])[CH:10]=2)[N:5]=[CH:4][CH:3]=1.[CH3:16][C:17]1[CH:18]=[C:19]([OH:24])[CH:20]=[CH:21][C:22]=1[CH3:23].[OH-].[Na+]>COCCOCCOC>[CH3:13][O:12][C:9]1[CH:10]=[C:11]2[C:6](=[CH:7][C:8]=1[O:14][CH3:15])[N:5]=[CH:4][CH:3]=[C:2]2[O:24][C:19]1[CH:20]=[CH:21][C:22]([CH3:23])=[C:17]([CH3:16])[CH:18]=1

Participants

Conditions

Temperature: 180 °C

Procedure

4-Chloro-6,7-dimethoxyquinoline (200 mg) and 3,4-dimethylphenol (274 mg) were suspended in diethylene glycol dimethyl ether (0.1 ml), and the suspension was stirred at 180° C. for 1.5 hr. The reaction solution was cooled to room temperature, an aqueous sodium hydroxide solution was added to the reaction solution, and the mixture was extracted with chloroform. The chloroform layer was then washed with saturated brine and was dried over anhydrous sodium sulfate. The solvent was removed therefrom by distillation under the reduced pressure, and the residue was purified by column chromatography on silica gel using acetone-chloroform to give 6,7-dimethoxy-4-(3,4-dimethylphenoxy)quinoline (160 mg, yield 58%).

Workup

temperatureThe reaction solution was cooled to room temperature
extractionthe mixture was extracted with chloroform
washThe chloroform layer was then washed with saturated brine
dry with materialwas dried over anhydrous sodium sulfate
customThe solvent was removed
distillationby distillation under the reduced pressure
customthe residue was purified by column chromatography on silica gel

Sources & evidence

ORD record: ord-3d14fea65c3846f2920e7e82745b8e7b
Source dataset: uspto-grants-2009_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07560558B2

Linked notes

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