Sulfuric Acid → 5-(4-Fluorophenyl)-4-[4-(methylsulfonyl)phenyl]thiophene-2-sulfonic acid
反応式
[F:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2[S:9][CH:10]=[CH:11][C:12]=2[C:13]2[CH:18]=[CH:17][C:16]([S:19]([CH3:22])(=[O:21])=[O:20])=[CH:15][CH:14]=2)=[CH:4][CH:3]=1.C(OC(=O)C)(=O)C.[S:30](=O)(=[O:33])([OH:32])[OH:31]>ClCCl>[F:1][C:2]1[CH:3]=[CH:4][C:5]([C:8]2[S:9][C:10]([S:30]([OH:33])(=[O:32])=[O:31])=[CH:11][C:12]=2[C:13]2[CH:18]=[CH:17][C:16]([S:19]([CH3:22])(=[O:21])=[O:20])=[CH:15][CH:14]=2)=[CH:6][CH:7]=1参加物
5
実験手順
A mixture of 2-(4-fluorophenyl)-3-[4-(methylsulfonyl)phenyl]thiophene (5 g), acetic anhydride (4.3 ml) and sulfuric acid (0.97 ml) in dichloromethane (47 ml) was stirred at ambient temperature overnight. The mixture was concentrated to give a crude blue oil of 5-(4-fluorophenyl)-4-[4-(methylsulfonyl)phenyl]thiophene-2-sulfonic acid (10.5 g).