Sodium Carbonate → tert-butyl 4-(5-(4-((1,2-dihydro-4,6-dimethyl-2-oxopyridin-3-yl)methylcarbamoyl)-1-isopropyl-3-methyl-1H-indazol-6-yl)pyridin-2-yl)piperazine-1-carboxylate

Participants

Reaction Conditions

Reaction Steps

To a stirred solution of 6-bromo-N-((1,2-dihydro-4,6-dimethyl-2-oxopyridin-3-yl)methyl)-1-isopropyl-3-methyl-1H-indazole-4-carboxamide (400 mg, 0.928 mmol) in DMF (20 mL) was added tert-butyl 4-(5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-2-yl)piperazine-1-carboxylate (397 mg, 1.02 mmol) followed by sodium carbonate (246 mg, 2.32 mmol) dissolved in water (4 mL) and degassed with argon for 30 min. PdCl2(PPh3)2 (65 mg, 0.092 mmol) was added and the mixture again degassed with argon for 10 min. The reaction mixture was stirred at 100° C. for 3 h. The reaction mixture was diluted with water (100 mL) and extracted with ethyl acetate (3×150 mL). The combined organic layers were dried over anhydrous Na2SO4, filtered, and concentrated to afford the crude product (650 mg). The crude compound was purified by silica gel chromatography (eluent: 0-10% MeOH: DCM). The product was triturated with diethyl ether (150 mL) to afford the title compound as an off white solid (270 mg, 47%). 1H NMR (DMSO-d6, 400 MHz): δ 1.498 (s, 9H), 1.560 (d, J=6.4 Hz, 6H), 2.128 (s, 3H), 2.413 (s, 3H), 2.526 (s, 3H), 3.579 (s, 8H), 4.610 (d, J=5.6 Hz, 2H), 4.760-4.824 (m, 1H), 5.907 (s, 1H), 6.70 (d, J=8.8 Hz, 1H), 7.311-7.346 (m, 2H), 7.454 (s, 1H), 7.735 (d, J=8.8 Hz, 1H), 8.463 (s, 1H), 10.991 (brs, 1H). LCMS (ES+): 614.25.

Provenance & Evidence