1-Benzyl-4-(3,5-di-t-butyl-4-hydroxy-benzoyl)piperazine → 1-(3,5-Di-t-butyl-4-hydroxybenzoyl)-piperazine

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Reaction Steps

In tetrahydrofuan (100 mL) was dissolved the compound (5.08 g, 12.4 mmol.) obtained in (1) above. To this solution was added 10% palladium/carbon (600 mg), and the resulting mixture was stirred under hydrogen atmosphere. The reaction mixture was filtered over Celite, and the filtrate was concentrated under reduced pressure. The residue was purified by silica gel column chromatography (chloroform/methanol=30/1), to give the desired compound as a white crystalline product (1.50 g, yield: 38%).

Provenance & Evidence