Potassium Acetate → 2-(4-Methyl-3-nitro-phenyl)-6-[2-(trifluoromethyl)-3-pyridyl]imidazo[2,1-f]pyridazine

Participants

Reaction Conditions

Reaction Steps

A 500 mL flask is charged with 6-chloro-2-(4-methyl-3-nitro-phenyl)imidazo[2,1-f]pyridazine (10.104 g, 0.035 mol), 3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2-(trifluoromethyl)pyridine (Journal of Organic Chemistry, 2011, 76, 1062) (13.38 g, 0.049 mol), KOAc (6.869 g, 0.07 mol), bis(dibenzylideneacetone)palladium(0) (2.01 g, 3.5 mmol), 2-dicyclohexylphosphino-2′,4′,6′-triisopropylbiphenyl (3.34 g, 0.007 mol), butanol (112 mL) and water (20 mL). The reaction mixture is heated at 90° C. for 4 hr. The reaction is filtered through celite and washed with EtOAc. The liquid layers are combined, concentrated onto celite and purified by silica gel chromatography (0-75% EtOAc in CH2Cl2) to give the title compound (7.98 g, 60% yield). LCMS (m/z)=400.4 [M+H]+, tR=2.76 min.

Provenance & Evidence