Pyridine → 2-chloro-N-[4-[1-(3-(trifluoromethyl)-[1,2,4]triazolo[4,3-b]pyridazin-6-yl]piperidin-4-yl]phenyl]acetamide

Participants

Reaction Steps

A solution of chloroacetyl chloride (140 mg, 1.24 mmol) in DCM (2 mL) was added dropwise to a stirred suspension of 4-[1-[3-(trifluoromethyl)[1,2,4]triazolo[4,3-b]pyridazin-6-yl]piperidin-4-yl]aniline (obtained as described in Example 615) (375 mg, 1.03 mmol) and pyridine (164 mg, 2.07 mmol) in DCM (3 mL) under nitrogen. The resulting solution was stirred at ambient temperature for 2 hours. The resulting precipitate was collected by filtration, washed with DCM (2 mL) and dried under vacuum to give 2-chloro-N-[4-[1-(3-(trifluoromethyl)-[1,2,4]triazolo[4,3-b]pyridazin-6-yl]piperidin-4-yl]phenyl]acetamide (418 mg, 92%) as a solid.

Provenance & Evidence