2-Methylbutanoic Acid → Tert-butyl (1-(2-methylbutanoyl)piperidin-4-yl)carbamate

Beteiligte Stoffe

Reaktionsschritte

tert-butyl piperidin-4-ylcarbamate (1 g, 5 mmol), 4-(N,N-dimethylamino)piperidine (0.73 g, 6 mmol) and EDCI (1.15 g, 6 mmol) were added into a solution of 2-methylbutanoic acid (0.612 g, 6 mmol) in CH2Cl2 (200 mL). The reaction was stirred overnight at rt. The reaction was quenched with the addition of 0.1 M HCl. The organic layer was further washed with sat. NaHCO3 solution followed by sat. NaCl solution. The organic layers was concentrated under vacuo. The product was purified by flash chromatography (Hex:EtOAc/1:1) yielding final product 15 (1.3 g, 4.6 mmol, 91.5% yield). H-NMR (DMSO-d6) ∂ 0.79 (q, J=5 Hz, 3H), 0.95 (m, 3H), 1.2-1.3 (m, 2H), 1.38 (s, 9H), 1.50 (m, 2H), 1.73 (t, J=15 Hz, 1H), 2.6-2.7 (m, 2H), 3.06 (t, J=12 Hz, 1H), 3.46 (m, 1H), 3.88 (d, J=12 Hz, 1H), 4.26 (m, 1H), 6.85 (d, J=8 Hz, 1H).

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