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

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The title compound (14 mg, 54% yield) as a yellow powder was prepared from 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 (26 mg, 0.05 mmol), and 2 M ethylamine solution in THF (0.5 mL) according to the procedures described for 7-(4-chlorophenyl)-2-((2-(methylamino)-6-(trifluoromethyl)pyridin-3-yl)methyl)-8-(pyridin-4-yl)-[1,2,4]triazolo[4,3-a]pyridin-3(2H)-one. HPLC/MS: retention time=3.50 min, [M+H]+=525.2.

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