Sodium Bicarbonate → sodium 7-methoxy-1-oxo-1H-2-benzothiopyran-3-carboxylate
Reaction equation
[CH3:1][O:2][C:3]1[CH:16]=[CH:15][C:6]2[CH:7]=[C:8]([C:12]([OH:14])=[O:13])[S:9][C:10](=[O:11])[C:5]=2[CH:4]=1.C(=O)(O)[O-].[Na+:21]>O>[CH3:1][O:2][C:3]1[CH:16]=[CH:15][C:6]2[CH:7]=[C:8]([C:12]([O-:14])=[O:13])[S:9][C:10](=[O:11])[C:5]=2[CH:4]=1.[Na+:21]Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Procedure
To a stirred suspension of 2.0347 g. (8.613 mM) of 7-methoxy-1-oxo-1H-2-benzothiopyran-3-carboxylic acid in 50 ml. of distilled water is added 0.7236 g. (8.613 mM) of sodium bicarbonate. The resulting mixture is stirred at 25°-35° for 1.25 hours, filtered, and the filtrate freeze-dried to give sodium 7-methoxy-1-oxo-1H-2-benzothiopyran-3-carboxylate as a pale yellow solid, m.p. >350°.