Hydrazine hydrate (1:1) → HCID 59850178, compound

Participants

Reaction Steps

A stirred suspension of 1,1-dimethylethyl 4-{[5-bromo-2-nitro-4-(trifluoromethyl)phenyl]amino}-1-piperidinecarboxylate (D66, 1.10 g, 2.3 mmol) in ethanol (50 ml) at room temperature under argon was treated with Raney Nickel (30 mg) followed by dropwise addition over 10 minutes of hydrazine hydrate (0.50 ml, 16 mmol). The mixture was stirred well at room temperature for 20 minutes, then heated at 45° C. for 1 hr, before cooling to 20° C. and filtering through Kieselguhr. The filtrate was concentrated under vacuum to afford the title compound as a white solid (0.98 g, 95%).

Provenance & Evidence