反应详情

A suspension of 1-phenyl-1H-indole-2,3-dione (1.908 g, 11.83 mmol) in ethylene glycol (30 mL) is treated with powdered potassium hydroxide (1.92 g, 112 mmol), hydrazine hydrate (16.35 mL) and water (4 mL) as described hereinabove. The crude product is purified by flash chromatography eluting with dichloromethane. Product containing fractions are combined, concentrated and the residue is triturated with pentane to afford 5-methyl-1-phenyl-1H-indol-2-one as an off-white solid. MS 224 (M+1)

1. customThe crude product is purified by flash chromatography
2. washeluting with dichloromethane
3. additionProduct containing fractions
4. concentrationconcentrated
5. customthe residue is triturated with pentane