3-Bromo-6-chloroimidazo(1,2-b)pyridazine → (6-Chloroimidazo[1,2-b]pyridazin-3-yl)(5,7-difluoroquinolin-6-yl)methanol

Beteiligte Stoffe

Reaktionsschritte

3-Bromo-6-chloro-imidazo[1,2-b]pyridazine (4.40 g, 18.95 mmol) was suspended in THF (189 mL) and the ethylmagnesium solution (3 M, 6.32 mL) was added slowly under nitrogen condition. The RM was stirred at rt for 15 min and the solution of 5,7-difluoro-quinoline-6-carbaldehyde (Intermediate F, 3.66 g, 18.95 mmol) was added. After 30 min, the reaction was quenched with 10% ammonium chloride. The precipitate was filtered off and a first part of the title compound was obtained as a white solid. The filtrate was concentrated and was taken up with 10% NH4Cl. The precipitate was filtered off and was washed with EtOAc. A second part of the title compound was obtained as a brown solid (tR 0.8 min (conditions 2), MH+=347).

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