反应详情

tert-Butyl 4-(4-{3-[3-({[(2,2,2-trifluoroethyl)amino]carbonyl}amino)phenyl]-imidazo[1,2-b]pyridazin-7-yl}-1H-pyrazol-1-yl)piperidine-1-carboxylate (0.965 g, 1.65 mmol) was dissolved in methanol (1.0 mL). To the solution was added 4 N HCl in dioxane (1.5 mL). The mixture was stirred at r.t. for 2 h. The mixture was cooled with ice-water, and was carefully neutralized with sodium methoxide in methanol solution (25% w/w, about 4.375 M, 1.38 mL) to pH about 8. The volatiles were removed under reduced pressure. The residue was dried in vacuo to afford the desired product which contained residual NaCl, and was directly used in next step reaction without further purification. LCMS (M+H)+: m/z=485.2.

1. customThe volatiles were removed under reduced pressure
2. customThe residue was dried in vacuo