Hydrochloric Acid → HCID 178487676, compound

HRID 553474Notes

Reaction equation

HRID 553474 reaction equation
[C:1]([CH2:9][C:10](OCC)=[O:11])(=O)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[CH3:15][O:16][C:17]1[CH:22]=[CH:21][CH:20]=[C:19]([NH2:23])[CH:18]=1.Cl.O1CCOCC1>C1(C)C=CC=CC=1.O.C(O)C>[C:2]1([C:1]2[CH:9]=[C:10]([OH:11])[C:20]3[C:19](=[CH:18][C:17]([O:16][CH3:15])=[CH:22][CH:21]=3)[N:23]=2)[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Participants

8

Reactant 4

HCID 313Hydrochloric AcidHCID 7170Ethyl benzoylacetateHCID 108243-MethoxyanilineHCID 312751,4-Dioxane

Product 1

HCID 178487676HCID 178487676, compound

Reagents, catalysts & solvents 3

HCID 702EthanolSolventHCID 962WaterSolventHCID 1140TolueneSolvent

Procedure

To a solution of ethyl benzoylacetate (10.00 g, 52.0 mmol., 1 eq) and m-anisidine (7.05 g, 57.2 mmol., 1.1 eq) in toluene (85 mL) was added 4M HCl in dioxane (0.520 mL, 2.08 mmol., 0.04 eq) drop wise. The reaction mixture was refluxed over night while ethanol and water were collected in a Dean and Stark's apparatus. The reaction mixture was left to cool to ambient temperature and the solvent removed under vacuum. The residue was suspended in diphenyl ether (28 mL) and the mixture was heated for 2 h at 240° C. The reaction mixture was then left to cool to ambient temperature and dichloromethane (55 mL) was added, leading to the precipitation of a yellow solid. Stirring was continued at ambient temperature for a further 30 min and the solid collected by filtration, rinsing the cake with a small amount of dichloromethane. The solid was transferred to a 100 ml round bottom flask and stirred with dichloromethane (50 mL) for another 45 min at ambient temperature. After filtration and drying under high vacuum, the title compound, 2-phenyl-4-hydroxy-7-methoxy-quinoline, was isolated as a pale yellow solid. Yield: 2.85 g (22%). 1H NMR (250 MHz, DMSO-d6) δ 11.54 (s, 1 H), 7.99 (d, J=8.91 Hz, 1 H), 7.73-7.90 (m, 2 H), 7.48-7.64 (m, 3H), 7.20 (d, J=2.32 Hz, 1 H), 6.94 (dd, J=2.34, 8.97 Hz, 1 H), 6.26 (s, 1 H), 3.86 (s, 3 H). LC-MS: purity 97% (ELS) 98% (UV), tR 1.52 min, m/z [M+1]+ 252.10.

Workup

  1. customwere collected in a Dean and Stark's apparatus
  2. waitThe reaction mixture was left
  3. customthe solvent removed under vacuum
  4. temperaturethe mixture was heated for 2 h at 240° C
  5. waitThe reaction mixture was then left
  6. temperatureto cool to ambient temperature
  7. additiondichloromethane (55 mL) was added
  8. customleading to the precipitation of a yellow solid
  9. filtrationthe solid collected by filtration
  10. washrinsing the cake with a small amount of dichloromethane
  11. customThe solid was transferred to a 100 ml round bottom flask
  12. stirringstirred with dichloromethane (50 mL) for another 45 min at ambient temperature
  13. filtrationAfter filtration
  14. customdrying under high vacuum

Sources & evidence

ORD record
ord-d9c68d610435427ab9c85241406db5cb
Source dataset
uspto-grants-2011_11
Patent number
US08048862B2

Reaction notes

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