Hydrazine hydrate (1:1) → 4-Methyl-3-(2'-oxospiro[cyclopentane-1,3'-indoline]-6'-yl)benzohydrazide

Participants

Reaction Conditions

Reaction Steps

Hydrazine monohydrate (0.67 mL, 13.8 mmol) was added to a stirred solution of methyl 4-methyl-3-(2′-oxospiro[cyclopentane-1,3′-indoline]-6′-yl)benzoate (preparation 53a, 0.46 g, 1.3 mmol) in ethanol (6 mL) and the mixture was stirred at 80° C. After 3 days, the mixture was cooled and concentrated in vacuo. The crude material was purified by flash chromatography (50:1 dichloromethane/methanol) to give the title compound (0.16 g, 19%) as a solid.

Provenance & Evidence