4-Benzyloxycarbonyl-1-(4-fluorobenzyl)-3,4-dihydropyrazin-2(1H)-one → 1-(4-Fluorobenzyl)piperazin-2-one

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Reaction Steps

A mixture of 4-benzyloxycarbonyl-1-(4-fluorobenzyl)-3,4-dihydro-pyrazin-2(1H)-one (0.5 g, 14.5 mmol) and Pearlman's catalyst (26 mg; 20% palladium hydroxide on carbon) in methanol (25 mL) was stirred under an atmosphere of hydrogen (1 atm) at room temperature overnight. The product mixture was filtered through a pad of Celite, and concentrated under vacuum to provide 1-(4-fluorobenzyl)piperazin-2-one.

Provenance & Evidence