A mixture of 2-amino-9-(trifluoromethyl)-5,7-dihydro-6H-pyrimido[5,4-d][1]benzazepin-6-one (0.42 g, 1.44 mmol), 3-bromo-5-chloro-2-(trifluoromethyl)pyridine (0.37 g, 1.44 mmol), Xphos (0.054 g, 0.115 mmol), and tris(dibenzylideneacetone)dipalladium(0) (0.052 g, 0.057 mmol) in a sealed microwave tube was evacuated and purged with argon 3 times. To the vial were added tert-butyl alcohol (5.3 mL) and 1.00 M of t-BuOK in tert-butyl alcohol (2.0 mL, 2.0 mol) via syringe. The mixture was allowed to stir to mix well, then was subjected to microwave irradiation at 150° C. for 1200 sec. The mixture was allowed to cool to rt and THF (6 mL) was added. The mixture was filtered and the solid was washed with THF. The organic solutions were combined and concentrated. The residue was purified by column chromatography to give 2-{[5-chloro-2-(trifluoromethyl)pyridin-3-yl]amino}-9-(trifluoromethyl)-5,7-dihydro-6H-pyrimido[5,4-d][1]benzazepin-6-one (0.081 g, 12%) as a solid.
