Triethylamine → N-[4-(3-Dimethylamino-prop-1-ynyl)-3-trifluoromethyl-phenyl]-2-(4-imidazo[4,5-b]pyridin-3-yl-phenyl)-acetamide

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Reaction Steps

Propylphosphonic anhydride (50% in DMF, 0.69 mL, 1.19 mmol, 2 equiv) is added to a solution of (4-imidazo[4,5-b]pyridin-3-yl-phenyl)acetic acid (Step 7.1) (0.150 g, 0.59 mmol), 4-(3-dimethylamino-prop-1-ynyl)-3-trifluoromethyl-phenylamine (0.138 g, 0.57 mmol, 0.95 equiv), DMAP (10 mg), and Et3N (0.82 mL, 5.93 mmol, 10 equiv) in DMF (2.0 mL), at rt and under an argon atmosphere. The reaction mixture is stirred at rt for 18 h, diluted with EtOAc and washed with H2O. The aqueous layer is extracted with EtOAc. The combined organic phase is washed with brine, dried (Na2SO4), filtered and concentrated. The residue is purified by reversed phase MPLC (CH3CN/H2O/TFA) to provide the title compound as a white solid: ES-MS: 477.9 [M+H]+; single peak at tR=3.20 min (System 1); Rf=0.06 (CH2Cl2/NH3 (2 N in MeOH), 95:5).

Provenance & Evidence