Acetic Acid → HCID 131719613, compound

Participants

Reaction Steps

To a solution of the product of step (iii) (1.34 g) and acetic acid (0.48 ml) in methanol under argon was added 10% Pd on C.(100 mg). The mixture was covered with a blanket. of hydrogen and stirred at room temperature for 4 hr. The catalyst was then removed by filtration through a pad of kieselguhr and the pH of the filtrate was adjusted to 4 by addition of acetic acid. To this mixture, under argon, was then added a further quantity of 10% Pd on C (100 mg), it was covered again with hydrogen and stirred at room temperature for 3 days. The catalyst was filtered off through a pad of kieselguhr and the filtrate was evaporated to dryness. Toluene (100 ml) was then added to the residue and the solvents were again removed in vacuo to give tert. butyl (S)-2-amino-5-[1-(4-pyridyl)piperidin-4-yl]aminopentanoate, triacetate salt (1.68 g) as a yellow gum: NMR (d6-DMSO+CD3CO2D) δ 1.49 (9H, s), 1.70 (6H, m), 2.23 (2H, m), 3.03 (2H, m), 3.25 (2H, m), 3.50 (1H, m), 3.96 (1H, m), 4.30 (2H, m), 7.18 (2H, d), 8.20 (2H, d); m/Z 349 (M+H)+.

Provenance & Evidence