反应详情

4-Nitro-1-aza-tricyclo[6.3.2.0*2,7*]trideca-2(7),3,5-triene (82 mg, 0.376 mmol) was dissolved in acetone (5 mL) and K2CO3 (104 mg, 0.752 mmol, 2.0 eq) and ethyl iodide (64.2 mg, 0.414 mmol, 32.9 μL, 1.1 eq) were added. The reaction was stirred at room temperature for 48 hours. The reaction was then concentrated under reduced pressure and the residue was taken up in 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 0-20% MeOH/CH2Cl2 as the eluting solvent to obtain 10-ethyl-4-nitro-10-aza-tricyclo[6.3.2.0*2,7*]trideca-2(7),3,5-triene as a pale orange oil (68 mg, 73%). LCMS (m/e) 247 (M+1); 1H-NMR (CDCl3, 400 MHz) δ 8.03 (dd, 1H, J=2.3 and 8.1 Hz), 7.94 (d, 1H, J=2.3 Hz), 7.20 (d, 1H, J=8.1 Hz), 3.17-3.08 (m, 2H), 2.95-2.86 (m, 2H), 2.43 (q, 2H, J=7.1 Hz), 2.30-2.19 (m, 4H), 1.66-1.57 (m, 2H), 0.99 (t, 3H, J=7.1 Hz).

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