反应详情

To a stirred solution of 4-oxohomopiperidine.HCl (1.2 g, 8.05 mmol), NaOH (0.68 g, 16.9 mmol) in t-BuOH/H2O (1:1, 10 mL) was added t-butyldicarbonate (1.93 mL, 8.9 mmol) drop-wise. The reaction was stirred at RT overnight, extracted with EtOAc (2×10 mL) and the organic layer separated. The organic layer was dried over Na2SO4 and concentrated under vacuo. Pure 1-t-butoxycarbonyl-4-oxohomopiperidine (1.42 g, 84%) was isolated via silica gel flash chromatography eluting with 50% EtOAc/hexane. 1H NMR CDCl3 δ: 44 (9H, s), 1.72–1.84 (2H, m), 2.60–2.65 (4H, m), 3.55–3.61 (4H, m).

1. extractionextracted with EtOAc (2×10 mL)
2. customthe organic layer separated
3. dry with materialThe organic layer was dried over Na2SO4
4. concentrationconcentrated under vacuo