Hydrazine hydrate (1:1) → HCID 76568135、化合物

The reaction mixture of racemic (2′R,3R,4′S)-6-chloro-4′-(5-chloro-2-nitro-phenyl)-2′-isopropenylspiro[3H-indole-3,3′-piperidine]-2,6′(1H)-dione (290 mg, 0.65 mmol), Raney Ni (39 mg) and NH2NH2.H2O (320 mg) in methanol was stirred at 80° C. for 0.5 h. The mixture was cooled to 4° C., and concentrated. To the residue were added ethyl acetate (10 mL) and water (10 mL). The organic layer was separated, washed with brine, dried over MgSO4 and concentrated. The residue was purified by column chromatography to give the title compound as a solid (Yield: 260 mg).