反应详情

To a solution of 8-(1-ethyl-propyl)-2,6-dimethyl-3-(2-methyl-thiophen-3-yl)-imidazo[1,2-b]pyridazine. (0.76 g, 2.42 mmol) and CH2Cl2 (10 mL) is added NBS (0.60 g, 3.37 mmol). The solution is stirred at ambient temperature for 2 hours and concentrated. The solution is dissolved in Et2O (30 mL) washed with water (3×30 mL), brine (30 mL) dried over MgSO4, filtered and concentrated to furnish the title compound (0.95 g, 2.42 mmol, >99%). 1H NMR (CDCl3), δ 0.88 (t, J=7.5 Hz, 6H), 1.74-1.93 (m, 4H), 2.31 (s, 3H), 2.42 (s, 3H), 2.51 (s, 3H), 3.29-3.38 (m, 1H), 6.66 (s, 1H), 7.04 (s, 1H). LC/MS (m/z): calcd. for C18H22BrN3S (M+H)+: 392.2; found: 392.1.

1. concentrationconcentrated
2. dissolutionThe solution is dissolved in Et2O (30 mL)
3. washwashed with water (3×30 mL), brine (30 mL)
4. dry with materialdried over MgSO4
5. filtrationfiltered
6. concentrationconcentrated