Carbon Dioxide → 1-(5-Acetoxy-6-bromohexyl)-3,7-dimethylxanthine
반응식
[OH:1][CH:2]([CH2:20]O)[CH2:3][CH2:4][CH2:5][CH2:6][N:7]1[C:16](=[O:17])[C:15]2[N:14]([CH3:18])[CH:13]=[N:12][C:11]=2[N:10]([CH3:19])[C:8]1=[O:9].[BrH:22].[C:23]([OH:26])(=O)[CH3:24].C(=O)(O)[O-].[Na+].C(=O)=O>>[C:23]([O:1][CH:2]([CH2:20][Br:22])[CH2:3][CH2:4][CH2:5][CH2:6][N:7]1[C:16](=[O:17])[C:15]2[N:14]([CH3:18])[CH:13]=[N:12][C:11]=2[N:10]([CH3:19])[C:8]1=[O:9])(=[O:26])[CH3:24]참가 물질
실험 절차
To 1-(5,6-dihydroxyhexyl)-3,7-dimethylxanthine 1.0 g, 3.38mmol) was added 30% hydrogen bromide-acetic acid (3.4 mL) over 30 seconds and then stirred for 2.5 hours until all of the solid dissolved. The solution was poured carefully over a mixture of sodium bicarbonate (12 g) and ice water (50 mL). After carbon dioxide evolution had subsided, the mixture was extracted with dichloromethane (3×25 mL). The combined extracts were dried over magnesium sulfate and the solvent evaporated under vacuum, yielding 1.3 g (3.24 mmol, 96%) 1-(5-Acetoxy-6-bromohexyl)-3,7-dimethylxanthine as a viscous oil, dissolved in methanol (5 mL). A 1M sodium methoxide in methanol solution (3.9 mL) was added over 30 seconds. After stirring for 20 minutes, the solution was reated with water (20 mL) and then extracted with dichloromethane (3×15 mL). The combined extracts were dried over magnesium sulfate and the solvents were evaporated under vacuum to yield 900 mg (3.24 mmol, 100% yield) 1-(5,6-Oxidohexyl)-3,7-dimethylxanthine as white crystals.
후처리
- dissolutiondissolved
- extractionthe mixture was extracted with dichloromethane (3×25 mL)
- dry with materialThe combined extracts were dried over magnesium sulfate
- customthe solvent evaporated under vacuum
출처 및 근거
- ORD 기록
- ord-f822b9deae4846f3ad09e1ad4e4f3161
- 출처 데이터셋
- uspto-grants-1999_02
- 특허 번호
- US05866576
반응 노트
불러오는 중…