反应详情

3,3-Dichloro-5-isopropyl-azepan-2-one (5.00 g, 22.3 mmol) was dissolved in acetic acid (125 ml) and sodium acetate (anhydrous, 2.38 g, 29.0 mmol), 10% Pd-c catalyst (0.22 g) were added. The degassed mixture was hydrogenated at r.t. and atmospheric pressure for 90 min. The reaction mixture was filtered and concentrated under reduced pressure. The residue was purified over silica gel (ethyl acetate/n-heptane 1:1): 3.49 g (74%) 1H NMR (CDCl3) δ 0.88-0.90 (m, 6H), 1.26-1.29 (m, 1H), 1.63-1.67 (m, 2H), 1.76-1.94 (m, 2H), 2.16-2.21 (m, 1H), 3.19-3.23 (m, 1H), 3.30-3.36 (m, 1H), 4.64 & 4.67 (dd, 1H), 6.45 (br, 1H) MS: m/e=190.3 (MH+), 207.2 (MNH4+)

1. customwas hydrogenated at r.t.
2. filtrationThe reaction mixture was filtered
3. concentrationconcentrated under reduced pressure
4. customThe residue was purified over silica gel (ethyl acetate/n-heptane 1:1)