Theophylline → 7-[4-(6-Chloronicotinoyl)benzyl]-1,3-dimethylxanthine

HRID 1291416Notes

Reaction equation

HRID 1291416 reaction equation
[CH3:1][N:2]1[C:11](=[O:12])[C:10]2[NH:9][CH:8]=[N:7][C:6]=2[N:5]([CH3:13])[C:3]1=[O:4].C(=O)([O-])[O-].[K+].[K+].[Cl:20][C:21]1[CH:36]=[CH:35][C:24]([C:25]([C:27]2[CH:34]=[CH:33][C:30]([CH2:31]Br)=[CH:29][CH:28]=2)=[O:26])=[CH:23][N:22]=1>CN(C=O)C.O>[Cl:20][C:21]1[CH:36]=[CH:35][C:24]([C:25]([C:27]2[CH:34]=[CH:33][C:30]([CH2:31][N:9]3[C:10]4[C:11](=[O:12])[N:2]([CH3:1])[C:3](=[O:4])[N:5]([CH3:13])[C:6]=4[N:7]=[CH:8]3)=[CH:29][CH:28]=2)=[O:26])=[CH:23][N:22]=1

Participants

6

Reactant 3

HCID 2153TheophyllineHCID 11430Potassium CarbonateHCID 189188004-(6-Chloronicotinoyl)benzyl bromide

Product 1

HCID 189188457-[4-(6-Chloronicotinoyl)benzyl]-1,3-dimethylxanthineYield 96.4%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent

Procedure

A solution of 1,3-dimethylxanthine (712 mg), potassium carbonate (578 mg) and 4-(6-chloronicotinoyl)benzyl bromide (1515 mg) in DMF (10 ml) was stirred at 60° C. for 5 hours. This reaction mixture was poured in water and extracted with ethyl acetate. The extract was washed with water, dried, and. concentrated. The residue was purified by silica gel column chromatography (hexane: ethyl acetate =1:3) and recrystallized from chloroform-isopropyl ether to provide the title compound as colorless solid (1562 mg).

Workup

  1. extractionextracted with ethyl acetate
  2. washThe extract was washed with water
  3. customdried
  4. concentrationconcentrated
  5. customThe residue was purified by silica gel column chromatography (hexane: ethyl acetate =1:3)
  6. customrecrystallized from chloroform-isopropyl ether

Sources & evidence

ORD record
ord-3be66d59852e4620ac6d8e241149b10e
Source dataset
uspto-grants-1998_05
Patent number
US05753664

Reaction notes

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