Water → HCID 69107964, compound

Participants

Reaction Steps

A 450 mg portion of trans-4-(4-cyano-3-trifluoromethylphenyl)-2,5-dimethyl-4′-nitropiperazine-1-carboxanilide synthesized in Example 1-4 was dissolved in 8 ml of methanol, and the solution was mixed with 4 ml of water, 280 mg of iron powder and 30 mg of ammonium chloride and heated under reflux for 5 hours. The reaction solution was again mixed with 280 mg of iron powder and 30 mg of ammonium chloride and further heated under reflux for 2 hours. The reaction solution was filtered through celite, and the solvent in the filtrate was evaporated under reduced pressure. The residue was dissolved in ethyl acetate, washed with water and saturated brine in that order and then dried over sodium sulfate. The solvent was evaporated under reduced pressure, and the residue was purified by a silica gel column chromatography (methanol-chloroform) to obtain 260 mg of the title compound as colorless crystals.

Provenance & Evidence