Cesium fluoride → 2',3'-difluoro-5-{(1R)-1-[5-fluoro-2-(2H-1,2,3-triazol-2-yl)phenyl]ethoxy}-3,4'-bipyridin-6-amine

Participants

Reaction Conditions

Reaction Steps

5-Bromo-3-[(R)-1-(5-fluoro-2-[1,2,3]triazol-2-yl-phenyl)-ethoxy]-pyridin-2-ylamine (example 45) (200 mg, 0.529 mmol, 1.0 eq) and 2,3-difluoropyridin-4-ylboronic acid (168 mg, 1.06 mmol, 2.0 eq) were dissolved in MeOH (5 mL), followed by the addition of freshly prepared aqueous solution of CsF (563 mg, 3.5 mmol, 7 eq) in water (3.34 mL) and Pd-132 (64 mg, 0.09 mmol, 0.17 eq), then degassed for three times. The mixture was heated up to 80° C. for overnight. LCMS showed >80% conversion to desired product, and ˜10% of des-bromation of example 45. The reaction mixture was filtered. The filtrate was concentrated and purified via a Biotage silica gel cartridge to provide the title compound (174 mg) as a white solid.

Provenance & Evidence