Tetrahedron Letters p. 3085 - 3087 (2013)
Update date:2022-09-26
Topics:
Obydennov, Dmitrii L.
Sidorova, Ekaterina S.
Usachev, Boris I.
Sosnovskikh, Vyacheslav Ya.
Reactions of 2-cyano-6-(trifluoromethyl)-4-pyrone, 2-cyano-4-pyrone, and 2-cyano-6-methyl-4-pyrone with aliphatic and aromatic amines in ethanol at -20 C for 2-21 days gave 5-amino-3-oxopent-4-enamides in 28-78% yields, which were cyclized with DMF-DMA in toluene under ambient conditions to afford 4-pyridone-3-carboxamides in 31-70% yields.
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