A 20 mL, oven dried vial was charged with 5-bromo-1-methyl-3-(1-methylethyl)-1H-indole-7-carboxylic acid (0.075 g, 0.253 mmol), 3-(aminomethyl)-4-benzyl-6-methylpyridin-2(1H)-one hydrochloride (0.080 g, 0.304 mmol), 1-hydroxy-7-azabenzotriazole (0.041 g, 0.304 mmol) and EDC (0.058 g, 0.304 mmol). Dimethyl sulfoxide (DMSO) (2 mL) was added via syringe, followed by N-methylmorpholine (0.111 mL, 1.013 mmol). The mixture was capped and stirred at RT over weekend. The reaction was poured into 60 mL water and the resultant mixture stirred for 10 min, then placed in a freezer for 10 min. The solids were filtered, washed with water (10 mL), air dried for 5 min, and placed in a vacuum oven (40° C.) for 2 h. Collected the solids and further dried in a vacuum oven (45° C.) for 18 h to give N-((4-benzyl-6-methyl-2-oxo-1,2-dihydropyridin-3-yl)methyl)-5-bromo-3-isopropyl-1-methyl-1H-indole-7-carboxamide (120 mg, 0.225 mmol, 89% yield). 1H NMR (400 MHz, DMSO-d6) δ ppm 11.58 (s, 1H), 8.63 (t, J=4.9 Hz, 1H), 7.75 (d, J=1.8 Hz, 1H), 7.30 (m, 2H), 7.22 (m, 3H), 7.13 (s, 1H), 7.05 (d, J=1.8 Hz, 1H), 5.78 (s, 1H), 4.39 (d, J=4.8 Hz, 2H), 3.96 (s, 2H), 3.64 (s, 3H), 3.11 (dt, J=13.6, 6.8 Hz, 1H), 2.09 (s, 3H), 1.26 (m, 6H). MS (ES) [M+H]+ 506.3.
