反应详情

To a 0° C. solution of N1,N1-bis-(3-methyl-pyridin-2-ylmethyl)-butane-1,4-diamine (237 mg, 0.80 mmol) in MeOH (10 mL) was added NaOAc (200 mg, 2.39 mmol) and cyanogen bromide (94 mg, 1.03 mmol) and stirred at room temperature for 17 hours. Water (10 mL) was added and the reaction mixture was extracted with CH2Cl2 (4×40 mL). The extracts were washed with brine (20 mL), dried (Na2SO4), filtered and concentrated to provide pure COMPOUND 198 as a beige solid (190 mg, 74%). 1H NMR (CDCl3) δ 1.45-1.51 (m, 2H), 1.65-1.63 (m, 2H), 2.12 (s, 6H), 2.61-2.65 (m, 2H), 2.83-2.89 (m, 2H), 3.68 (s, 4H), 7.08 (dd, 2H, J=4.2, 7.8 Hz), 7.38 (d, 2H, J=7.8 Hz), 7.57 (br s, 1H), 8.37 (d, 2H, J=4.2 Hz). 13C NMR (CDCl3) δ 18.5, 21.1, 28.3, 44.4, 53.6, 58.2, 118.9, 122.9, 133.4, 138.6, 146.6, 156.7. ES-MS m/z 324 (M+H). Anal. Calcd. for C19H25N5.0.4 CH2Cl2.0.1CH4O: C, 64.95; H, 7.32; N, 19.42. Found: C, 64.65; H, 7.22; N, 19.27.

1. extractionthe reaction mixture was extracted with CH2Cl2 (4×40 mL)
2. washThe extracts were washed with brine (20 mL)
3. dry with materialdried (Na2SO4)
4. filtrationfiltered
5. concentrationconcentrated