Sodium Carbonate → 2'-Fluoro-N-methyl-5'-[7-(propan-2-yl)-7H-imidazo[4,5-c]pyridazin-4-yl]biphenyl-4-sulfonamide

Participants

Reaction Conditions

Reaction Steps

To a solution of 2′-fluoro-N-methyl-5′-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)biphenyl-4-sulfonamide (Preparation 44, 112 mg, 0.29 mmol) and 4-chloro-7-isopropyl-7H-imidazo[4,5-c]pyridazine (Preparation 6, 54 mg, 0.27 mmol) in anhydrous dioxane (1.6 mL) was added aqueous Na2CO3 solution (2M, 0.41 mL, 0.81 mmol) and a stream of nitrogen gas was bubbled through the suspension for 5 minutes. Tetrakistriphenylphosphine palladium(0) (5.8 mg, 0.005 mmol) was added and the mixture was heated under microwave irradiation at 120° C. for 12 minutes. The reaction mixture was cooled and diluted with EtOAc (15 mL) and water (30 mL). The organic phase was extracted and the aqueous layer was back-extracted with EtOAc (2×15 mL). The organic layers were combined, washed with brine, dried over Na2SO4, filtered and the filtrate was evaporated in vacuo to leave a tan solid that was suspended in EtOAc (2.5 mL) and stirred at room temperature for 18 hours. The solid was filtered, rinsed with EtOAc (2×1 mL) and further dried to afford the title compound as an off-white solid in 82% yield, 120 mg.

Provenance & Evidence