Hydrochloric Acid → N-[3-(7-{1-[3-(cyanomethyl)azetidin-3-yl]-1H-pyrazol-4-yl]imidazo[1,2-b]pyridazin-3-yl)phenyl]-N'-(2,2,2-trifluoroethyl)urea

Participants

Reaction Steps

HCl in 1,4-dioxane (4.0 N, 2 mL) was added to a mixture of tert-butyl 3-(cyanomethyl)-3-(4-{3-[3-({[(2,2,2-trifluoro ethyl)amino]carbonyl}amino)phenyl]imidazo[1,2-b]pyridazin-7-yl}-1H-pyrazol-1-yl)azetidine-1-carboxylate (0.55 g, 0.92 mmol) in methylene chloride (10.0 mL). The reaction mixture was stirred at r.t. for 1 h. The mixture was adjusted to pH=8 with aqueous Na2CO3, and extracted with ethyl acetate (3×40 mL). The combined organic layers were dried over MgSO4, filtered and concentrated under reduced pressure. The residue was purified by flash chromatography on a silica gel column with MeOH (with 5% NH3.H2O) in DCM (0-15%) to afford the desired product. LCMS (M+H)+: m/z=496.1.

Provenance & Evidence