Reaction Steps
To a stirred solution of 6-bromo-1-cyclopentyl-N-((4,6-dimethyl-2-oxo-1,2-dihydropyridin-3-yl)methyl)-1H-indazole-4-carboxamide (0.5 g, 1.12 mmol), was added 2,2,6,6-tetramethyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1,2,3,6-tetrahydropyridine (0.36 g, 1.35 mmol) and Pd(PPh3)4 (0.066 g, 0.057 mmol) in 1,4-dioxane (10 mL) and the flask purged with argon for 10 min 2M Na2CO3 solution (0.43 g, 4.06 mmol) was then added and the flask again purged with argon for 10 min. The reaction mixture was stirred at 100° C. for 1 h. After completion, water was added and extraction carried out using 10% MeOH/DCM. The combined organic layers were washed with water, dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to afford crude material which was purified by column chromatography to give 1-cyclopentyl-N-((4,6-dimethyl-2-oxo-1,2-dihydropyridin-3-yl)methyl)-6-(2,2,6,6-tetramethyl-1,2,3,6-tetrahydropyridin-4-yl)-1H-indazole-4-carboxamide (0.53 g, 77.6%). LCMS: 502.55 (M+1)+; HPLC: 99.25% (@ 254 nm) (Rt;5.528); 1H NMR (DMSO-d6, 400 MHz) δ 11.52 (bs, 1H), 8.54 (t, 1H), 8.26 (s, 1H), 7.75 (s, 1H), 7.62 (s, 1H), 6.26 (s, 1H), 5.88 (s, 1H), 5.29-5.24 (m, 1H), 4.37 (d, 2H, J=5.2 Hz), 2.32 (m, 2H), 2.23 (s, 3H), 2.12 (s, 3H), 1.99-1.93 (m, 4H), 1.92-1.88 (m, 2H), 1.72-1.69 (m, 2H), 1.23 (s, 6H), 1.17 (s, 6H).
