反应详情

To a solution of tert-butyl 2-(4-aminobenzoyl)hydrazinecarboxylate (1.0 g, 3.98 mmol) in anhydrous pyridine (20 mL) was added dropwise methyl 4-(chlorocarbonyl)benzoate (TCI) (948 mg, 4.78 mmol) at rt. After 50 min, aminomethyl resin (Polymers Laboratories PL-AMS, 1.96 mmol/g, 960 mg) was added and the resulting mixture was stirred for 22 hrs at rt After filtration and rinsing the resin, water (160 mL) was added into the filtrate and a white solid precipitated out. Filtration and washing with water gave a white solid, which was dried under vacuo at 60° C. for 15 hrs. The title compound (1.41 g) was obtained as a white solid (85%) in 98.7% purity by HPLC (MaxPlot detection between 230 and 400 mn).

1. additionaminomethyl resin (Polymers Laboratories PL-AMS, 1.96 mmol/g, 960 mg) was added
2. filtrationAfter filtration
3. washrinsing the resin, water (160 mL)
4. additionwas added into the filtrate
5. customa white solid precipitated out
6. filtrationFiltration
7. washwashing with water
8. customgave a white solid, which
9. customwas dried under vacuo at 60° C. for 15 hrs