Piperazine-1,4-dicarboxylic acid propyl ester benzyl ester → Propyl piperazine-1-carboxylate

Participants

Reaction Steps

To a solution of 19.3 g piperazine-1,4-dicarboxylic acid propyl ester benzyl ester in 200 ml ethanol were added 2.0 g Pd/C (10%) and the suspension stirred under an atmosphere of hydrogen (3 bar) for 3 h. The reaction mixture was filtrated over a plug of Celite, washed with ethanol and concentrated to give the crude product which was used in the subsequent reaction. Yield: 10.5 g.

Provenance & Evidence