Selectfluor → 8-Bromo-6-chloro-3-fluoroimidazo[1,2-b]pyridazine

Participants

Reaction Steps

In a 20 ml reaction vial was added 8-bromo-6-chloroimidazo[1,2-b]pyridazine hydrochloride salt (0.33 g, 1.4 mmol) from Example I(1), step 1b, CH3CN (7.0 ml) and selectflor (0.5 g, 1.4 mmol). The reaction was stirred at 50 C for 6 hrs, then concentrated to dryness. Purification was done by silica gel chromatography (ethyl acetate/heptane, 25 min gradient: 5-50% ethyl acetate) to give 0.085 g of 8-bromo-6-chloro-3-fluoroimidazo[1,2-b]pyridazine.

Provenance & Evidence