A microwave reaction vial was charged with 6-chloro-1-methyl-1,5-dihydro-pyrrolo[3,2-c]pyridine-4-one (Intermediate G) (16 mg, 0.08 mmol), 4-(trifluoromethyl)phenylboronic acid (20 mg, 0.10 mmol), tetrakis(triphenylphosphine)palladium(0) (5.06 mg, 0.004 mmol), and 2M aqueous sodium carbonate solution (0.13 mL) in ethanol (2 mL). The vial was sealed and then heated in a microwave at 140° C. for 10 min. At this time, the resulting mixture was filtered through a pad of Celite® and concentrated in vacuo. Flash chromatography (20/1 methylene chloride/methanol) afforded 1-methyl-6-(4-trifluoromethyl-phenyl)-1,5-dihydro-pyrrolo[3,2-c]pyridin-4-one (25.6 mg, 39.1%) as a white solid. 1H NMR (400 MHz, DMSO-d6) δ ppm 3.8 (s, 3H) 6.5 (d, J=3.01 Hz, 1H) 7.0 (s, 1H) 7.1 (d, J=3.01 Hz, 1H) 7.8 (d, J=8.28 Hz, 2H) 8.0 (d, J=8.28 Hz, 2H) 11.1 (br. s., 1H). LC-MS calcd. for C15H12F3N2O [(M+H)+] 293, obsd. 293.0.
