3-Cyano-6-styryl-2-pyridones (IV), prepared by condensation of cinnamoylacetaldehydes (I) with cyanoacetamide, have been degraded to a variety of products including 1,2-dihydro-2-oxopyridine-3-carboxylic acids. Analogously, ethyl 3-cyano-1,2-dihydro-2-oxo-6-styryl-pyridine-4-carboxylates (X) led to another series of 1,2-dihydro-2-oxopyridine carboxylic acids.
L. Rateb, G. A. Mina and G. Soliman, J. Chem. Soc. C, 1968, 2140 DOI: 10.1039/J39680002140
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