1-Hydroxybenzotriazole → N-(3-fluoro-4-(1-(4-methoxybenzyl)-3-(1-methyl-1H-imidazol-2-yl)-1H-pyrazolo[3,4-b]pyridin-4-yloxy)phenyl)-2-(4-fluorophenyl)-3-oxo-2,3-dihydropyridazine-4-carboxamide

Participants

Reaction Steps

4-(1-(4-Methoxybenzyl)-3-(1-methyl-1H-imidazol-2-yl)-1H-pyrazolo[3,4-b]pyridin-4-yloxy)-3-fluorobenzenamine (143.2 mg, 0.322 mmol), 2-(4-fluorophenyl)-3-oxo-2,3-dihydropyridazine-4-carboxylic acid (377.3 mg, 1.61 mmol, prepared in Example 19, step C), N1-((ethylimino)methylene)-N3,N3-dimethylpropane-1,3-diamine hydrochloride (308.8 mg, 1.61 mmol), 1H-benzo[d][1,2,3]triazol-1-ol (217.7 mg, 1.61 mmol), N-ethyl-N-isopropylpropan-2-amine (208.2 mg, 1.61 mmol) and CH2Cl2 (5 mL) were charged in a 25 mL, single-neck, round-bottomed flask. The reaction mixture was stirred at room temperature until the starting material had been consumed (overnight). Then the reaction mixture was partitioned between EtOAc (50 mL) and H2O (50 mL). The phases were separated and the aqueous phase was re-extracted with EtOAc (3×50 mL). The combined organic layers were dried (Na2SO4), filtered and concentrated to yield a crude product. The crude product was purified by silica gel chromatography (DCM/7 M NH3 in MeOH from 100/1 to 10/1, v/v) to afford product (127 mg, 59.67%). LRMS (APCI pos): >99% purity, 254 nm, m/e 661 (M+1).

Provenance & Evidence