Ethyl Acetate → Tert-butyl 4-(4-cyanophenyl)piperazine-1-carboxylate

Participants

Reaction Conditions

Reaction Steps

A mixture of 4-fluorobenzonitrile (3.6 g) and N-tert-butyloxycarbonylpiperazine (5.58 g) in acetonitrile (60 mL) was heated at 80° C. for 72 hours. The reaction mixture was then cooled to room temperature and then treated with a mixture of sodium bicarbonate solution and ethyl acetate (300 mL, 1:1, v/v). The organic phase was separated and then evaporated. The residue was subjected to chromatography on silica gel eluting with a mixtures of heptane and ethyl acetate (from 3:7 to 1:1, v/v) to give the title compound (2 g) as a white solid.

Provenance & Evidence