Dichloromethane → 7-(4-chlorophenyl)-2-((2-ethyl-6-(trifluoromethyl)pyridin-3-yl)methyl)-8-(pyridin-4-yl)-[1,2,4]triazolo[4,3-a]pyridin-3(2H)-one

関与物質

反応手順

A mixture of 2-((2-chloro-6-(trifluoromethyl)pyridin-3-yl)methyl)-7-(4-chlorophenyl)-8-(pyridin-4-yl)-[1,2,4]triazolo[4,3-a]pyridin-3(2H)-one (22 mg, 0.043 mmol), anhydrous THF (0.5 mL), diethylzinc (1.1 M solution in toluene, 0.059 mL, 0.065 mmol), solid K2CO3 (18 mg, 0.129 mmol) and Pd(dppf)Cl2.CH2Cl2 (7 mg, 0.0086 mmol) in a sealed tube was stirred at 80° C. for 16 h. After cooling to room temperature, the reaction mixture was diluted with EtOAc, washed with water, then saturated aqueous NaCl, dried over Na2SO4 and concentrated under reduced pressure. Two products were 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 80% B over 10 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). HPLC 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 7-(4-chlorophenyl)-2-((2-ethyl-6-(trifluoromethyl)pyridin-3-yl)methyl)-8-(pyridin-4-yl)-[1,2,4]triazolo[4,3-a]pyridin-3(2H)-one (11 mg) and the title compound (7 mg) as a yellow powder. Title compound: HPLC/MS: retention time=3.20 min, [M+H]+=504.3.

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