Sulfuric Acid → 2-(8-Bromo-5-methoxy-2-oxo-1,2-dihydroquinolin-4-yl)acetic acid
反応式
C(O[C:5](=[CH:19][C:20](=[O:22])C)[CH2:6][C:7]([NH:9][C:10]1[CH:15]=[C:14]([O:16][CH3:17])[CH:13]=[CH:12][C:11]=1[Br:18])=[O:8])(=O)C.S(=O)(=O)(O)[OH:24]>>[Br:18][C:11]1[CH:12]=[CH:13][C:14]([O:16][CH3:17])=[C:15]2[C:10]=1[NH:9][C:7](=[O:8])[CH:6]=[C:5]2[CH2:19][C:20]([OH:22])=[O:24]参加物
3
実験手順
1-(2-bromo-5-methoxyphenylamino)-1,5-dioxohex-3-en-3-yl acetate (8 g; 21.50 mmol) was added in small portions to concentrated sulfuric acid (30 ml) at room temperature and the mixture was stirred for 30 min. Ice was added to the reaction mixture and the formed precipitate was filtered, washed with water and dried over phosphorus pentoxide under reduced pressure to afford 5.97 g (89%) of 2-(8-bromo-5-methoxy-2-oxo-1,2-dihydroquinolin-4-yl)acetic acid as a grey solid.
後処理
- additionIce was added to the reaction mixture
- filtrationthe formed precipitate was filtered