反应详情

温度

0 °C

To a solution of COMPOUND 249 (0.5021 g, 1.6 mmol) and anhydrous NaOAc (0.3775 g, 4.6 mmol) in MeOH (16 mL) was added at 0° C. cyanogen bromide (0.2315 g, 2.2 mmol), and stirred at for 2 hours at 0° C., then for another 3 hours at room temperature. Distilled water (20 mL) was added and extracted with CH2Cl2 (3×150 mL). The combined organic extracts were washed with brine (2×75 mL), dried (Na2SO4), filtered, and concentrated to provide 0.5137 g (96%) of 4-[bis-(3-methyl-pyridin-2-ylmethyl)-amino]-piperidine-1-carbonitrile as a beige solid. 1H NMR (CDCl3) δ 1.77-1.90 (m, 2H), 1.95-1.99 (m, 2H), 2.11 (s, 6H), 2.66 (t, 1H, J=12.0 Hz), 2.88-2.97 (m, 2H), 3.45-3.49 (m, 2H), 3.87 (s, 4H), 7.09-7.13 (m, 2H), 7.39 (d, 2H, J=6.0 Hz), 8.36 (d, 2H, J=3.0 Hz).

1. waitfor another 3 hours at room temperature
2. extractionextracted with CH2Cl2 (3×150 mL)
3. washThe combined organic extracts were washed with brine (2×75 mL)
4. dry with materialdried (Na2SO4)
5. filtrationfiltered
6. concentrationconcentrated