Formic Acid → tert-butyl (2R,5S)-2,5-dimethylpiperazine-1-carboxylate

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Reaction Steps

Under an argon atmosphere, (2R,5S)-tert-butyl 4-benzyl-2,5-dimethylpiperazine-1-carboxylate (2.0 g, 6.57 mmol) was dissolved in methanol (60 mL), and added 10% palladium carbon (670 mg) and formic acid (1.5 g, 32.9 mmol). The mixture was stirred at room temperature for 2 hours. Then, the reaction solution was filtered through a pad of celite, and concentrated in vacuo. The obtained residue was added chloroform and a saturated aqueous solution of sodium hydrogen carbonate, extracted with chloroform, dried over sodium sulfate, concentrated in vacuo, and the title compound (1.56 g, >100%) was obtained as a yellow oil.

Provenance & Evidence