反应详情

To a suspension of 4-{[4-(methoxycarbonyl)benzoyl]amino}benzoic acid (300 mg g, 1 mmol) in EtOH (4.5 mL) was added hydrazine hydrate (0.73 mL). After stirring for 15 h at reflux, the reaction mixture was cooled to rt and a white solid precipitated out. Filtration, washing with EtOH (3×1 mL) and drying under vacuo at 70° C. for 2 hrs gave a white solid. This residue was taken up in water (25 mL) and AcOH (5 mL) was added. A white solid precipitated out which was further washed with water (3×2 mL). Drying at 80° C. for 1 hr gave 220 mg of the title compound (73%) as a white solid in 91.2% purity by HPLC (MaxPlot detection between 230 and 400 nm).

1. temperatureat reflux
2. customa white solid precipitated out
3. filtrationFiltration
4. washwashing with EtOH (3×1 mL)
5. customdrying under vacuo at 70° C. for 2 hrs
6. customgave a white solid
7. customA white solid precipitated out which
8. washwas further washed with water (3×2 mL)
9. customDrying at 80° C. for 1 hr