Acetic Acid → Tert-butyl 4-carbamimidoylpiperidine-1-carboxylate

Beteiligte Stoffe

Reaktionsschritte

Dissolve 4-(N-Hydroxycarbamimidoyl)-piperidine-1-carboxylic acid tert-butyl ester (9.7 g 1.00 equiv; 39.9 mmoles) in methanol (300 mL) and add acetic acid (2 equiv, 79.73 mmoles; 4.6 mL), and methanol washed Raney Nickel (2.7 g). Heat the reaction to 50° C., then hydrogenate with 1 ATM hydrogen gas for 4.5 hours. Filter the reaction mixture through Celite and concentrate under reduced pressure. Suspend the solid in diethyl ether, filter and dry under reduced pressure to give 10.39 g of 4-carbamimidoyl-piperidine-1-carboxylic acid tert-butyl ester.

Herkunft & Nachweise