Dimethyl Sulfoxide → 6-Ethyl-1-[4-(4-hydroxybenzoyl)benzyl]-7-methyl-imidazo[1,2-a]pyrimidin-5(1H)-one

HRID 1291385Notes

Reaction equation

HRID 1291385 reaction equation
[CH2:1]([C:3]1[C:8](=[O:9])[N:7]2[CH:10]=[CH:11][NH:12][C:6]2=[N:5][C:4]=1[CH3:13])[CH3:2].[Si]([O:21][C:22]1[CH:37]=[CH:36][C:25]([C:26]([C:28]2[CH:35]=[CH:34][C:31]([CH2:32]Br)=[CH:30][CH:29]=2)=[O:27])=[CH:24][CH:23]=1)(C(C)(C)C)(C)C.C(=O)([O-])[O-].[K+].[K+].CS(C)=O>CN(C=O)C>[CH2:1]([C:3]1[C:8](=[O:9])[N:7]2[CH:10]=[CH:11][N:12]([CH2:32][C:31]3[CH:30]=[CH:29][C:28]([C:26](=[O:27])[C:25]4[CH:36]=[CH:37][C:22]([OH:21])=[CH:23][CH:24]=4)=[CH:35][CH:34]=3)[C:6]2=[N:5][C:4]=1[CH3:13])[CH3:2]

Participants

6

Reactant 4

HCID 679Dimethyl SulfoxideHCID 11430Potassium CarbonateHCID 18918912HCID 18918912, compoundHCID 178436760HCID 178436760, compound

Product 1

HCID 189189466-Ethyl-1-[4-(4-hydroxybenzoyl)benzyl]-7-methyl-imidazo[1,2-a]pyrimidin-5(1H)-oneYield 10.6%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

A solution of 6-ethyl-7-methylimidazo[1,2-a]-pyrimidin-5(1H)-one (3.93 g), 4-(4-t-butyldimethylsilyloxybenzoyl)benzyl bromide (14.79 g) and potassium carbonate (5.97 g) in DMF (25 ml)-dimethyl sulfoxide (25 ml) was stirred at room temperature for 20 hours. This reaction mixture was concentrated and the residue was extracted with ethyl acetate. The extract was washed with water, dried, and concentrated. The residue was purified by silica gel column chromatography (dichloromethane: methanol =9:1) and recrystallized from ethanol-ethyl acetate to provide the title compound as colorless solid (909 mg).

Workup

  1. concentrationThis reaction mixture was concentrated
  2. extractionthe residue was extracted with ethyl acetate
  3. washThe extract was washed with water
  4. customdried
  5. concentrationconcentrated
  6. customThe residue was purified by silica gel column chromatography (dichloromethane: methanol =9:1)
  7. customrecrystallized from ethanol-ethyl acetate

Sources & evidence

ORD record
ord-ce19d69685834beca3632b89a35c6d89
Source dataset
uspto-grants-1998_05
Patent number
US05753664

Reaction notes

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