Water → Methyl 1-ethyl-6-oxo-1,6-dihydropyridine-3-carboxylate

HRID 2238835Notes

Reaction equation

HRID 2238835 reaction equation
[O:1]=[C:2]1[CH:7]=[CH:6][C:5]([C:8]([O:10][CH3:11])=[O:9])=[CH:4][NH:3]1.[H-].[Na+].[CH2:14](I)[CH3:15].O>CN(C=O)C>[CH2:14]([N:3]1[CH:4]=[C:5]([C:8]([O:10][CH3:11])=[O:9])[CH:6]=[CH:7][C:2]1=[O:1])[CH3:15]

Participants

6

Reactant 4

HCID 962WaterHCID 6340IodoethaneHCID 24758Sodium hydrideHCID 416343Methyl 6-oxo-1,6-dihydropyridine-3-carboxylate

Product 1

HCID 12633571Methyl 1-ethyl-6-oxo-1,6-dihydropyridine-3-carboxylateYield 79.3%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

Methyl 2-oxo-1,2-dihydropyridine-5-carboxylate (400 mg, 2.61 mmol) obtained in Step 3 was dissolved in DMF (3 mL), and 55% sodium hydride (125 mg, 2.87 mmol) and ethyl iodide (0.230 mL, 2.87 mmol) were added thereto, followed by stirring at room temperature for 2 hours. Water was added to the reaction mixture, followed by extraction with ethyl acetate. The organic layer was washed with a saturated aqueous solution of sodium chloride and dried over anhydrous magnesium sulfate, and then the solvent was distilled away under reduced pressure. The resulting residue was purified through silica gel column chromatography (ethyl acetate) to afford methyl 1-ethyl-2-oxo-1,2-dihydropyridine-5-carboxylate (375 mg, 79%).

Workup

  1. extractionfollowed by extraction with ethyl acetate
  2. washThe organic layer was washed with a saturated aqueous solution of sodium chloride
  3. dry with materialdried over anhydrous magnesium sulfate
  4. distillationthe solvent was distilled away under reduced pressure
  5. customThe resulting residue was purified through silica gel column chromatography (ethyl acetate)

Sources & evidence

ORD record
ord-338e7a350fee414991d9bda032ffed94
Source dataset
uspto-grants-2010_05
Patent number
US07718808B2

Reaction notes

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