2-[3,5-bis(trifluoromethyl)phenyl]-N-(6′-chloro-6-fluoro-2-methyl-3,4′-bipyridin-3′-yl) -N,2-dimethylpropanamide (D54, 53.5 mg, 0.1 mmol), (7S,9aS)-7-({[(1,1-dimethylethyl)(dimethyl)silyl]oxy}methyl)octahydropyrazino[2,1-c][1,4]oxazine (D51, 37 mg, 0.13 mmol) were dissolved in toluene (1.5 mL). Bis tritertbutylphosphine palladium (13 mg, 0.026 mmol), followed by hexadecyltrimethylammoium chloride (10 μL, 25% aq sol), and finally sodium hydroxide solution (0.13 mL, 50% aq sol). The mixture was degassed for 5 minutes before heating at 90° C. for 4.5 hours. Cooled to R.T., diluted with EtOAc, washed with sat. NaHCO3 solution, dried (MgSO4).
