Isopropyl iodide → 7-[4-(4-Chlorobenzoyl)benzyl]-1-isopropyl-3-methylxanthine

HRID 1291412

Reaction equation

HRID 1291412 reaction equation
[CH3:1][N:2]1[C:10]2[N:9]=[CH:8][N:7]([CH2:11][C:12]3[CH:17]=[CH:16][C:15]([C:18](=[O:26])[C:19]4[CH:24]=[CH:23][C:22]([Cl:25])=[CH:21][CH:20]=4)=[CH:14][CH:13]=3)[C:6]=2[C:5](=[O:27])[NH:4][C:3]1=[O:28].C(=O)([O-])[O-].[K+].[K+].[CH:35](I)([CH3:37])[CH3:36]>CN(C=O)C.O>[Cl:25][C:22]1[CH:23]=[CH:24][C:19]([C:18]([C:15]2[CH:14]=[CH:13][C:12]([CH2:11][N:7]3[C:6]4[C:5](=[O:27])[N:4]([CH:35]([CH3:37])[CH3:36])[C:3](=[O:28])[N:2]([CH3:1])[C:10]=4[N:9]=[CH:8]3)=[CH:17][CH:16]=2)=[O:26])=[CH:20][CH:21]=1

Participants

6

Reactant 3

HCID 6362Isopropyl iodideHCID 11430Potassium CarbonateHCID 189188013-Methyl-7-[4-(4-chlorobenzoyl)benzyl]xanthine

Product 1

HCID 189192457-[4-(4-Chlorobenzoyl)benzyl]-1-isopropyl-3-methylxanthineYield 6.3%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent

Procedure

A solution of 3-methyl-7-[4-(4-chlorobenzoyl)-benzyl]xanthine (544 mg), potassium carbonate (202 mg) and isopropyl iodide (356 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 =1:1) and recrystallized from acetone-hexane to provide the title compound as colorless solid (38 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 =1:1)
  6. customrecrystallized from acetone-hexane

Sources & evidence

ORD record
ord-bcf7b3611c324a34a886238f54b510c8
Source dataset
uspto-grants-1998_05
Patent number
US05753664

Linked notes

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