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

HRID 1291421Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1291421
[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+].[CH3:20][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][CH:22]=1>CN(C=O)C.O>[CH3:20][C:21]1[CH:36]=[CH:35][C:24]([C:25]([C:27]2[CH:28]=[CH:29][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:33][CH:34]=2)=[O:26])=[CH:23][CH:22]=1

Komponenten

6

Edukt 3

HCID 2153TheophyllineHCID 11430Potassium CarbonateHCID 108807584-(4-Toluoyl)benzyl bromide

Produkt 1

HCID 189191537-[4-(4-Methylbenzoyl)benzyl]-1,3-dimethylxanthineAusbeute 45,9 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 962WaterLösungsmittelHCID 6228DimethylformamideLösungsmittel

Versuchsvorschrift

A solution of 1,3-dimethylxanthine (99 mg), potassium carbonate (135 mg), 4-(4-methylbenzoyl)benzyl bromide (201 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 =1:5) and recrystallized from ethyl acetate-isopropyl ether to provide the title compound as colorless solid (98 mg).

Aufarbeitung

  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 =1:5)
  6. customrecrystallized from ethyl acetate-isopropyl ether

Quellen und Nachweise

ORD-Eintrag
ord-e4edcaa068964357a3fa09f747dabab6
Quelldatensatz
uspto-grants-1998_05
Patentnummer
US05753664

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