A solution of tert-butyl 3-(4-((4-chloro-5-(trifluoromethyl)pyrimidin-2-yl)amino)phenyl)azetidine-1-carboxylate (K4) (260 mg, 0.606 mmol), PdCl2(PPh3)2 (21 mg, 0.030 mmol), PPh3 (16 mg, 0.061 mmol), CuI (12 mg, 0.061 mmol) and methyl 1-(2-ethynylphenyl)cyclopropanecarboxylate (K2) (146 mg, 0.728 mmol) in DMF (3.0 mL) was degassed with nitrogen for 10 minutes. Et3N (1.0 mL) was added and the resulting mixture heated under microwave irradiation at 120° C. for 20 minutes. The resulting mixture was adsorbed onto silica and purified by silica gel column chromatography (Biotage Isolera, 40 g SiO2 cartridge, 0-25% EtOAc in petroleum benzine 40-60° C.) to give the title compound A7 as an orange oil (359 mg, >95%); 1H NMR (400 MHz, d6-DMSO) δ 10.45 (s, 1H), 8.82 (s, 1H), 7.75 (d, J=8.4 Hz, 2H), 7.61 (dd, J=7.5, 1.0 Hz, 1H), 7.55-7.38 (m, 3H), 7.32 (d, J=8.6 Hz, 2H), 4.32-4.17 (m, 2H), 3.89-3.74 (m, 3H), 3.52 (s, 3H), 1.64 (q, J=4.0 Hz, 2H), 1.40 (s, 9H), 1.29 (q, J=4.2 Hz, 2H). LCMS-A: rt 6.550 min; m/z 593 [M+H]+.
