A solution of tert-butyl (trans)-2-(6-bromopyridin-3-yl)cyclopropylcarbamate (Intermediate E, 250 mg, 0.798 mmol), 3-chloroaniline (122 mg, 0.958 mmol), Sodium tert-butoxide (115 mg, 1.198 mmol) in 1,4-dioxane (5 mL) was degassed for 30 min, tris(dibenzylidene acetone)dipalladium(0) (36 mg, 0.039 mmol) and 4,5-Bis(diphenyl phosphino)-9,0-dimethyl xanthene (138 mg, 0.39 mmol) was added and heated for 4 h at 80° C. After completion, the solvent was evaporated; the residue was poured into ice cold water (10 mL) and extracted with EtOAc (2×20 mL). The combined extracts were washed with water (10 mL), brine (10 mL), dried over anhydrous Na2SO4, filtered and evaporated. The crude residue was purified by flash chromatography to give tert-butyl (trans)-2-(6-(3-chlorophenylamino)pyridin-3-yl)cyclopropylcarbamate (180 mg, 63%) as white solid.
