Pyridine → 1-[2-bromo-4-(methoxycarbonyl)phenyl]-3-methoxy-3-oxopropane-1-sulfonic Acid pyridine
Reaction equation
[Br:1][C:2]1[CH:7]=[C:6]([C:8]([O:10][CH3:11])=[O:9])[CH:5]=[CH:4][C:3]=1[CH:12]([S:18]([OH:21])(=[O:20])=[O:19])[CH2:13][C:14]([O:16][CH3:17])=[O:15].C(OC(=O)C)(=O)C.[N:29]1[CH:34]=[CH:33][CH:32]=[CH:31][CH:30]=1>>[Br:1][C:2]1[CH:7]=[C:6]([C:8]([O:10][CH3:11])=[O:9])[CH:5]=[CH:4][C:3]=1[CH:12]([S:18]([OH:21])(=[O:19])=[O:20])[CH2:13][C:14]([O:16][CH3:17])=[O:15].[N:29]1[CH:34]=[CH:33][CH:32]=[CH:31][CH:30]=1Participants
4
Procedure
To a flask contained 1-[2-bromo-4-(methoxycarbonyl)phenyl]-3-methoxy-3-oxopropane-1-sulfonic acid (0.78 g, 2.0 mmol) was added acetic anhydride (0.965 mL, 10.2 mmol) and pyridine (0.496 mL) at room temperature. The mixture was stirred at room temperature overnight. The salt was precipitated by addition of diethyl ether, isolated by filtration. The crude product was used in next step.