Oxalic Acid → N-cyclopropyl-6-[4-[(3-chlorophenyl)phenylmethyl]-1-piperazinyl]hexanesulfonamide oxalate

Participants

Reaction Steps

N-Cyclopropyl-6-[4-[(3-chlorophenyl)phenylmethyl]-1-piperazinyl]hexanesulfonamide (1.00 g, 2.04 mmol) prepared in the same manner as in Example 1 was dissolved in methanol (50 ml). Oxalic acid dehydrate (0.32 g, 2.55 mmol) was added thereto. After dissolving the mixture with heating, the solvent was removed by evaporation in vacuo. Acetone was added to the residue, and the precipitated crystals were collected by filtration. The crystals were recrystallized from acetone, to give N-cyclopropyl-6-[4-[(3-chlorophenyl)phenylmethyl]-1-piperazinyl]hexanesulfonamide oxalate (0.85 g) as colorless crystals (yield based on N-cyclopropyl-6-[4-[(3-chlorophenyl)phenylmethyl]-1-piperazinyl]hexanesulfonamide: 71.8%).

Provenance & Evidence