Methanesulfonamide → 5-chloro-4-({5-chloro-6-[(1R)-2,2,2-trifluoro-1-methylethoxy]pyridin-3-yl}oxy)-2-fluoro-N-(methylsulfonyl)benzamide

Participants

Reaction Steps

To a solution of methanesulfonamide (105 mg, 1.1 mmol) in THF (4 mL) was added potassium tert-butoxide (126 mg, 1.1 mmol) and the mixture was stirred for 10 minutes at room temperature. A solution of 4-methylphenyl 5-chloro-4-({5-chloro-6-[(1R)-2,2,2-trifluoro-1-methylethoxy]pyridin-3-yl}oxy)-2-fluorobenzoate (Preparation 234, 429 mg, 0.85 mmol) in THF (4 mL) was added and the resulting mixture was stirred at 50° C. for 3 hours. The reaction mixture was allowed to cool to room temperature. The reaction was quenched with water and acidified with 1N aqueous citric acid solution. The mixture was partitioned between water and DCM (3×5 mL) and filtered through a phase separation cartridge. The filtrate was concentrated in vacuo to give a crude solid that was purified using trituration with heptanes/acetone 9/1 to give the title compound (199 mg, 48%) as a white solid.

Provenance & Evidence