Sodium Bicarbonate → 5-Amino-1,2-dihydroquinolin-2-one

HRID 2054943Notes

Reaction equation

HRID 2054943 reaction equation
[NH2:1][C:2]1[CH:11]=[CH:10][CH:9]=[C:8]2[C:3]=1[CH:4]=[CH:5][C:6]([O:12]C)=[N:7]2.C([O-])(O)=O.[Na+]>Cl.O>[NH2:1][C:2]1[CH:11]=[CH:10][CH:9]=[C:8]2[C:3]=1[CH:4]=[CH:5][C:6](=[O:12])[NH:7]2

Participants

5

Reactant 2

HCID 516892Sodium BicarbonateHCID 122830362-Methoxyquinolin-5-amine

Product 1

HCID 157190785-Amino-1,2-dihydroquinolin-2-oneYield 50.4%

Reagents, catalysts & solvents 2

HCID 313Hydrochloric AcidSolventHCID 962WaterSolvent

Procedure

1.45 g (8.3 mmol) of 5-amino-2-methoxyquinoline is refluxed in 29 ml of 6N HCl for 4.5 hours. It is allowed to cool to room temperature, diluted with water, made basic with NaHCO3, extracted with ethyl acetate, the combined organic extracts are dried (Na2SO4) and concentrated by evaporation. Purification of the residue by chromatography on silica gel with hexane-ethyl acetate yields 670 mg of a yellow solid.

Workup

  1. extractionextracted with ethyl acetate
  2. dry with materialthe combined organic extracts are dried (Na2SO4)
  3. concentrationconcentrated by evaporation
  4. customPurification of the residue by chromatography on silica gel with hexane-ethyl acetate

Sources & evidence

ORD record
ord-dee10a59762f4ab3bf9734a3db35bd2d
Source dataset
uspto-grants-2008_02
Patent number
US07329753B2

Reaction notes

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