Hydrazine hydrate (1:1) → HCID 19030721, compound

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Reaction Steps

To 1-[1-(2-methoxy-4-ethoxybenzoyl)-4-piperidinyl]-3-ethoxycarbonyl-3,4-dihydrocarbostyril (1.1 g) are added hydrazine monohydrate (1.1 g) and ethanol (15 ml) and the mixture is refluxed with heating for 7 hours. The reaction mixture is concentrated and the residue is purified by silica gel column chromatography (solvent: dichloromethane→dichloromethane:methanol=20:1) to give 1-[1-(2-methoxy-4-ethoxybenzoyl)4-piperidinyl]-3-hydrazinocarbonyl-3,4-dihydrocarbostyril (0.9 g) as white amorphous form.

Provenance & Evidence