Theophylline → 7-[4-(2,4-Dichlorobenzoyl)benzyl]-1,3-dimethyl-xanthine

HRID 1291257노트

반응식

HRID 1291257 반응식
[N:1]1([C:12](=[O:13])[C:11]2[NH:10][CH:9]=[N:8][C:7]=2[N:5]([CH3:6])[C:3]1=[O:4])[CH3:2].C(=O)([O-])[O-].[K+].[K+].[Cl:20][C:21]1[CH:36]=[C:35]([Cl:37])[CH:34]=[CH:33][C:22]=1[C:23]([C:25]1[CH:32]=[CH:31][C:28]([CH2:29]Br)=[CH:27][CH:26]=1)=[O:24]>CN(C=O)C.O>[Cl:20][C:21]1[CH:36]=[C:35]([Cl:37])[CH:34]=[CH:33][C:22]=1[C:23]([C:25]1[CH:26]=[CH:27][C:28]([CH2:29][N:10]2[C:11]3[C:12](=[O:13])[N:1]([CH3:2])[C:3](=[O:4])[N:5]([CH3:6])[C:7]=3[N:8]=[CH:9]2)=[CH:31][CH:32]=1)=[O:24]

참가 물질

6

반응물 3

HCID 2153TheophyllineHCID 11430Potassium CarbonateHCID 189192794-(2,4-Dichlorobenzoyl)benzyl bromide

생성물 1

HCID 189191327-[4-(2,4-Dichlorobenzoyl)benzyl]-1,3-dimethyl-xanthine수율 78.8%

시약·촉매·용매 2

HCID 962Water용매HCID 6228Dimethylformamide용매

실험 절차

To a solution of theophylline (1.80 g) in DMF (20 ml) were added potassium carbonate (1.66 g) and 4-(2,4-dichlorobenzoyl)benzyl bromide (3.33 g) and the mixture was stirred at room temperature for 24 hours. This reaction mixture was diluted with water and extracted with ethyl acetate. The extract was washed with saturated aqueous NaCl solution and dried over anhydrous sodium sulfate. The solvent was then distilled off and the residue was recrystallized (ethyl acetate) to provide the title compound as white powder (3.38 g, 76%). 1H-NMR (CDCl3) δ: 3.39(3H,s), 3.60(3H,s), 5.58(2H,s), 7.25-7.84(8H,m).

후처리

  1. extractionextracted with ethyl acetate
  2. washThe extract was washed with saturated aqueous NaCl solution
  3. dry with materialdried over anhydrous sodium sulfate
  4. distillationThe solvent was then distilled off
  5. customthe residue was recrystallized (ethyl acetate)

출처 및 근거

ORD 기록
ord-cb672e19e8224ff0bd697630544e30a0
출처 데이터셋
uspto-grants-1998_05
특허 번호
US05753664

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