反应详情

温度

80 °C

Compound 6 (6 g, 0.02 mol) was dissolved in 80 ml of dry DMF then sodium azide (1.8 g, 0.027 mol) was added. The suspension was stirred at 80° C. (oil bath) for 3 h. The solvent was then removed at reduced pressure and the residual oil was treated with CH2Cl2 (100 mL). The resulting solution was washed with water (2×100 mL), brine and dried over magnesium sulfate. The solvent was removed under reduced pressure then the residue was redissolved in a 1:1 mixture of ethyl acetate/hexanes (200 mL) and passed through a pad of silica gel. The solvent was removed under reduced pressure to give 4.1 g (85%) of 7 as clear oil. 1H NMR (300 MHz, CDCl3) δ 1.68 (m, 4H), 2.22 (t, 2H), 3.29 (t, 3H), 3.92 (s, 3H), 7.28 (d, 2H) 7.98 (d, 2H).

1. customThe solvent was then removed at reduced pressure
2. additionthe residual oil was treated with CH2Cl2 (100 mL)
3. washThe resulting solution was washed with water (2×100 mL), brine
4. dry with materialdried over magnesium sulfate
5. customThe solvent was removed under reduced pressure
6. dissolutionthe residue was redissolved in a 1:1 mixture of ethyl acetate/hexanes (200 mL)
7. customThe solvent was removed under reduced pressure