反应详情

温度

80 °C

4-Nitro-1-aza-tricyclo[6.3.2.0*2,7*]trideca-2(7),3,5-triene (80 mg, 0.367 mmol) was placed in 1,2-dichloroethane (2 mL) and acetic acid (0.1 mL). Acetone (31.9 mg, 0.550 mmol, 40.4 μL, 1.5 eq) was added and the reaction was stirred for 5 minutes. Sodium borohydride (16.3 mg, 0.440 mmol, 1.2 eq) was added and the reaction was heated at 80° C. for 2 hours. The reaction was then diluted with CH2Cl2 (10 mL) and washed with water (10 mL). The organic layer was dried (sodium sulfate), filtered, and concentrated under reduced pressure. Purification by silica gel chromatography using a gradient of 0-15% MeOH/CH2Cl2 as the eluting solvent to obtain 10-isopropyl-4-nitro-10-aza-tricyclo[6.3.2.0*2,7*]trideca-2(7),3,5-triene as pale orange oil (62 mg, 65%). LCMS (m/e) 261 (M+1); 1H-NMR (CDCl3, 400 MHz) δ 8.02 (dd, 1H, J=2.2 and 8.1 Hz), 7.93 (d, 1H, J=2.2 Hz), 7.19 (d, 1H, J=8.1 Hz), 3.15-3.08 (m, 2H), 2.90-2.75 (m, 3H), 2.35 (t, 2H, J=9.5 Hz), 2.21 (d, 2H, J=8.8 Hz), 1.60-1.55 (m, 2H), 0.93 (d, 6H, J=6.6 Hz).

1. washwashed with water (10 mL)
2. dry with materialThe organic layer was dried (sodium sulfate)
3. filtrationfiltered
4. concentrationconcentrated under reduced pressure
5. customPurification by silica gel chromatography