Methanol → 2-Methoxy-3-nitrobenzoic acid
Reaktionsgleichung
[OH:1][C:2]1[C:11]([N+:12]([O-:14])=[O:13])=[CH:10][CH:9]=[CH:8][C:3]=1[C:4]([O:6]C)=[O:5].[OH-].[Na+].[CH3:17]O>>[CH3:17][O:1][C:2]1[C:11]([N+:12]([O-:14])=[O:13])=[CH:10][CH:9]=[CH:8][C:3]=1[C:4]([OH:6])=[O:5]Komponenten
4
Versuchsvorschrift
Methyl 2-hydroxy-3-nitrobenzoate (2.85 g, 13.50 mmol) was dissolved in hot methanol (10 mL) at 75° C. to make clear solution and 1N aq. sodium hydroxide (28.3 mL, 28.3 mmol) was added dropwise. The mixture was heated under reflux for 15 minutes and then cooled to room temperature, concentrated to remove the methanol and then cooled in an ice bath. The solution was acidified via the dropwise addition of 1M (aq.) HCl until the pH was ˜1, resulting in the product precipitating out of solution. The solid was collected by filtration, rinsed with water, and dried on the filter to afford the product 2-methoxy-3-nitrobenzoic acid (2.48 g, 12.58 mmol, 93% yield) as a white solid. HPLC (Method N) RT=1.57 minutes.