2,4-Diphenyloxazol-5(4H)-one reacted smoothly with 1-azabuta-1,3-dienes to afford the dihydro-α-pyridones (3) in good yields. The acetylated adducts (4) were isolated, allowing a mechanism for the formation of these products to be proposed.
B. Sain, J. N. Baruah and J. S. Sandhu, J. Chem. Soc., Perkin Trans. 1, 1985, 773 DOI: 10.1039/P19850000773
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