反应详情

Acetic anhydride (0.35 mL, 3.71 mmol) was added to a solution of 2-[4-benzyloxy-2-nitronaphthalen-1-yl]ethanol ((0.3 g, 0.93 mmol) in dry pyridine (3 mL) at room temperature and stirred overnight. The mixture was concentrated and dissolved in AcOEt (50 mL). The organic layer was washed with 1 M HCl (10 mL), saturated aqueous NaHCO3 (10 mL) and saturated aqueous NaCl (10 mL), and then the organic layer was dried (Na2SO4) and concentrate. The residue was purified by silica-gel column (AcOEt: Petroleum ether=1: 6) to yield 2-[4-benzyloxy-2-nitronaphthalen-1-yl]ethyl acetate ((0.21 g, 62%) as a yellow solid. mp 82-87° C.; 1H NMR (CDCl3, 500 MHz) δ 8.43 (d, 8.5, 1H), 8.33 (d, 8.5, 1H), 7.33 (dt, 1.0, 7.5, 1H), 7.66 (dt, 1.0, 7.0, 1H), 7.54 (d, 7.5, 2H), 7.45 (t, 7.5, 2H), 7.40 (t, 7.0, 1H), 7.28 (s, 1H), 5.30 (s, 2H), 4.47 (t, 7.0, 2H), 3.55 (t, 7.0, 2H), 2.06 (s, 3H); EIMS m/z 388 (M+Na+); IR (neat) νmax 1738, 1593, 1527, 1514, 1466, 1424, 1365, 1337, 1235, 1104, 1043, 770, 752, 698 cm−1.

1. concentrationThe mixture was concentrated
2. dissolutiondissolved in AcOEt (50 mL)
3. washThe organic layer was washed with 1 M HCl (10 mL), saturated aqueous NaHCO3 (10 mL) and saturated aqueous NaCl (10 mL)
4. dry with materialthe organic layer was dried (Na2SO4)
5. concentrationconcentrate
6. customThe residue was purified by silica-gel column (AcOEt: Petroleum ether=1: 6)