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Synthesis 1992; 1992(12): 1291-1294
DOI: 10.1055/s-1992-26361
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Thermal Cyclization of Ketene Dithioacetals: A Convenient Synthetic Route to Substituted 2(1H)-Quinolinones and 2(1H)-Pyridones

Chwang Siek Pak* , Eun Bok Choi
  • *Korea Research Institute of Chemical Technology P. O. Box 9, Daedeog-Danji, Daejeon, South Korea
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Publication Date:
29 April 2002 (online)

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Acyl(arylcarbamoyl)ketene dithioacetals 2 and acyl(1-alkenylcarbamoyl)ketene dithioacetals 5 obtained from the corresponding ß-oxo amides 1, 4 were thermally cyclized to give various 3-acyl-4-alkylthio-2(1H)-quinolinones 3, and 3-acyl-4-alkylthio-5-aryl-2(1H)-pyridones 6, respectively, depending on the substituent of the amide group.