Acetic Acid → 4-(6-Methyl-5-oxo-3-phenyl-5,6-dihydro-1,6-naphthyridin-2-yl)benzaldehyde

HRID 604999Notes

Reaction equation

HRID 604999 reaction equation
[O:1]=[C:2]1[NH:11][CH:10]=[CH:9][C:8]2[N:7]=[C:6]([C:12]3[CH:19]=[CH:18][C:15]([CH:16]=[O:17])=[CH:14][CH:13]=3)[C:5]([C:20]3[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=3)=[CH:4][C:3]1=2.[H-].[Na+].CI.[C:30](O)(=O)C>CN(C=O)C.C(OCC)(=O)C>[CH3:30][N:11]1[CH:10]=[CH:9][C:8]2[N:7]=[C:6]([C:12]3[CH:19]=[CH:18][C:15]([CH:16]=[O:17])=[CH:14][CH:13]=3)[C:5]([C:20]3[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=3)=[CH:4][C:3]=2[C:2]1=[O:1]

Participants

7

Reactant 4

HCID 176Acetic AcidHCID 6328Methyl iodideHCID 24758Sodium hydrideHCID 592646194-(5-Oxo-3-phenyl-5,6-dihydro-1,6-naphthyridin-2-yl)benzaldehyde

Product 1

HCID 866249424-(6-Methyl-5-oxo-3-phenyl-5,6-dihydro-1,6-naphthyridin-2-yl)benzaldehyde

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent

Procedure

To a solution of 4-(5-oxo-3-phenyl-5,6-dihydro-1,6-naphthyridin-2-yl)benzaldehyde (186 mg, 0.57 mmol) in dry DMF (2 mL) was added 60% sodium hydride in mineral oil (29 mg, 0.72 mmol). The reaction was stirred at room temperature for 15 minutes and then methyl iodide was added via syringe (40 μL, 0.70 mmol). After 30 minutes the reaction was diluted with ethyl acetate and some acetic acid was added to neutralize the base. The solution was washed with aqueous NaHCO3 and the organic layer was dried (anhydrous Na2SO4), filtered and the solvent evaporated. The residue was triturated with diethyl ether to give the title compound as a pale yellow solid. The mother liquors were chromatographed on silica gel eluting with a 30-70% ethyl acetate/hexane gradient to give additional product. 1H-NMR (500 MHz, CDCl3): δ 10.02 (1H, s), 8.74 (1H, s), 7.80 (2H, d, J=8 Hz), 7.60 (2H, d, J=8 Hz), 7.37 (1H, d, J=7.6 Hz), 7.28-7.31 (2H, m), 7.19-7.22 (2H, m), 6.85 (1H, d, J=7.6 Hz), 3.67 (3H, s). m/e (m+1): 341.1.

Workup

  1. washThe solution was washed with aqueous NaHCO3
  2. dry with materialthe organic layer was dried (anhydrous Na2SO4)
  3. filtrationfiltered
  4. customthe solvent evaporated
  5. customThe residue was triturated with diethyl ether

Sources & evidence

ORD record
ord-789aed7ff6454838acf2c675b0cbb8a4
Source dataset
uspto-grants-2011_03
Patent number
US07910561B2

Reaction notes

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