Water → 1-[4-(4-Methoxybenzoyl)benzyl]-2,3,5-trimethyl-1H-pyrrolo [2,3-d]pyridazin-4(5H)-one

HRID 1291295Notes

Reaction equation

HRID 1291295 reaction equation
[CH3:1][C:2]1[NH:12][C:5]2[CH:6]=[N:7][N:8]([CH3:11])[C:9](=[O:10])[C:4]=2[C:3]=1[CH3:13].[H-].[Na+].[CH3:16][O:17][C:18]1[CH:33]=[CH:32][C:21]([C:22]([C:24]2[CH:31]=[CH:30][C:27]([CH2:28]Br)=[CH:26][CH:25]=2)=[O:23])=[CH:20][CH:19]=1.O>CN(C=O)C>[CH3:16][O:17][C:18]1[CH:33]=[CH:32][C:21]([C:22]([C:24]2[CH:25]=[CH:26][C:27]([CH2:28][N:12]3[C:5]4[CH:6]=[N:7][N:8]([CH3:11])[C:9](=[O:10])[C:4]=4[C:3]([CH3:13])=[C:2]3[CH3:1])=[CH:30][CH:31]=2)=[O:23])=[CH:20][CH:19]=1

Participants

6

Reactant 4

HCID 962WaterHCID 24758Sodium hydrideHCID 131506704-(4-Methoxybenzoyl)benzyl bromideHCID 1356675992,3,5-Trimethyl-1H-pyrrolo[2,3-d]pyridazin-4(5H)-one

Product 1

HCID 699616861-[4-(4-Methoxybenzoyl)benzyl]-2,3,5-trimethyl-1H-pyrrolo [2,3-d]pyridazin-4(5H)-oneYield 71%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent3×

Procedure

A solution of 2,3,5-trimethyl-1H-pyrrolo[2,3-d]-pyridazin-4(5H)-one (1.06 g) in DMF (90 ml) was dripped into a suspension of 60% sodium hydride-oil (288 mg) in DMF (24 ml) on an ice-water bath. The mixture was stirred at room temperature for 1 hour, after which a solution of 4-(4-methoxybenzoyl)benzyl bromide (2.40 g) in DMF (30 ml) was added and the mixture was further stirred at room temperature for 2 hours. The reaction was stopped by adding water and the reaction mixture was extracted with ethyl acetate. The extract was dried over anhydrous magnesium sulfate and the solvent was distilled off under reduced pressure. The residue was purified by silica gel column chromatography (developer; n-hexane: ethyl acetate=1:1-1:2) to provide the title compound as light-yellow powder (1.70 g, yield 71%).

Workup

  1. stirringthe mixture was further stirred at room temperature for 2 hours
  2. extractionthe reaction mixture was extracted with ethyl acetate
  3. dry with materialThe extract was dried over anhydrous magnesium sulfate
  4. distillationthe solvent was distilled off under reduced pressure
  5. customThe residue was purified by silica gel column chromatography (developer; n-hexane: ethyl acetate=1:1-1:2)

Sources & evidence

ORD record
ord-ebf049dda25a4f61bcbe500c0b737980
Source dataset
uspto-grants-1998_05
Patent number
US05753664

Reaction notes

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