反应详情

To a stirring solution of 3-((7-(4-chlorophenyl)-3-oxo-8-(pyridin-4-yl)-[1,2,4]triazolo[4,3-a]pyridin-2(3H)-yl)methyl)-6-(trifluoromethyl)picolinoyl chloride (36 mg, 0.066 mmol) in anhydrous THF (1 mL) at room temperature was added 28% aqueous ammonium hydroxide solution (1 mL). The resulting mixture was stirred at room temperature for 10 min. Analysis by HPLC/MS indicated the starting acid chloride had been consumed and the desired product had formed. The reaction mixture was diluted with water and extracted with EtOAc (15 mL×2). The combined EtOAc extracts were washed with saturated aqueous NaCl, dried over Na2SO4 and concentrated under reduced pressure. The residue was purified using preparative reverse phase HPLC (Phenomenex Luna 5 μm C-18 21.2×100 mm column eluted with a linear gradient of 50% to 100% B over 8 min (A=0.1% trifluoroacetic acid, 90% water, 10% methanol and B=0.1% trifluoroacetic acid, 90% methanol, 10% water) with flow rate at 20 mL/min and UV detection at 220 nm). The desired fractions were concentrated under reduced pressure. The residue was dissolved in EtOAc, washed with saturated aqueous NaHCO3 once, water twice, then saturated aqueous NaCl, dried over Na2SO4 and evaporated. The residue was dissolved in acetonitrile, frozen and lyophilized to afford 20 mg (57%) of the title compound as a pale yellow powder. HPLC/MS: retention time=2.75 min, [M+H]+=525.1.

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