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Synthesis and Biological Activity of 4-(Pyridin-3-yl)-2-hydroxy-4-oxobut-2-enoic Acid Derivatives

Claisen condensation reaction of diethyl oxalate with 1-[4-(furan-2-yl)-2-methyl-5-nitro-6-phenylpyridin-3-yl]ethan-1-one afforded (Z)-4-[4-(furan-2-yl)-2-methyl-5-nitro-6-phenylpyridin-3-yl]-2-hydroxy-4-oxobut-2-enoic acid. The latter reacted with various binucleo-philes to form the corresponding 3,4-dihydroquinoxaline-2(1 H)-one, 3,4-dihydro-2 H -benzo[ b ][1,4]oxazin-2-one, and 1 H -pyrazole derivatives. Biological screening of the obtained compounds revealed analgesic and antibacterial activity.

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Reference£º
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N178 | ChemSpider