反应详情

To a −78° C. solution of 3-{2,6-dimethyl-3-[3-methyl-5-(6-methyl-pyridin-2-yl)-thiophen-2-yl]-imidazo[1,2-b]pyridazin-8-yl}-pentan-3-ol (0.23 g, 0.55 mmol) and CH2Cl2 (3 mL) is added a solution of [bis(2-methoxyethyl)amino]sulfur triflouride (0.14 g, 0.60 mmol) and CH2Cl2 (2 mL). The solution is warmed to ambient temperature and stirred overnight. The solution is washed with sat. NaHCO3 (5 mL) and concentrated. The reside is purified by ISCO column chromatography (15%-20% EtOAc/hexane gradient) furnish the title compound (0.13 g, 0.31 mmol, 57%). 1H NMR (CDCl3) δ 0.80 (t, J=7.5 Hz, 6H), 2.14 (s, 3H), 2.16-2.31 (m, 2H), 2.46 (s, 3H), 2.54 (s, 3H), 2.56 (s, 3H), 2.59-2.70 (m, 2H), 6.98 (s, 1H), 7.00 (d, J=7.6 Hz, 1H), 7.45 (d, J=7.8 Hz, 1H), 7.52 (s, 1H), 7.56 (dd, J=7.8, 7.6 Hz, 1H). LC/MS (m/z): calcd. for C24H27FN4S (M+H)+: 423.2; found: 423.4.

1. washThe solution is washed with sat. NaHCO3 (5 mL)
2. concentrationconcentrated
3. customThe reside is purified by ISCO column chromatography (15%-20% EtOAc/hexane gradient)