反应详情

Into a suspension of methyl 4-[(4-{[2-(5-iodo-2-oxo-1,2-dihydro-3H-indol-3-ylidene)hydrazino]carbonyl}phenyl)amino]4-oxobutanoate (250 mg, 0.48 mmol) in THF/H2O (2/1) (10 mL) was added NaOH (1.0 N, 2.4 mL). The resulting solution was stirred at rt for 1.5 hr and quenched with HCl (5 N, 2 mL). A yellow solid precipitated out. Filtration, washing with water (2×5 mL) and drying under vacuo at 70° C. for 20 hrs gave the title compound as a yellow powder (83 mg, 34%) in 99.2% purity by HPLC (MaxPlot detection between 230 and 400 nm).

1. customquenched with HCl (5 N, 2 mL)
2. customA yellow solid precipitated out
3. filtrationFiltration
4. washwashing with water (2×5 mL)
5. customdrying under vacuo at 70° C. for 20 hrs