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Synthesis 1987; 1987(2): 128-134
DOI: 10.1055/s-1987-27860
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Oxamic Acid Derivatives in Heterocyclic Synthesis: Preparation of 1,4-Oxazine and 1,2,4-Triazino[5,6-e][1,3,4]oxadiazine Derivatives

P. Molina* , A. Tárraga, A. Espinosa, M. J. Lidón
  • *Departamento de Química Orgánica, Facultad de Ciencias, Universidad de Murcia, E-3000 Murcia, Spain
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Publikationsdatum:
12. September 2002 (online)

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A number of derivatives of the 1,4-oxazine ring system have been prepared by reaction of N-aryl-N-(α-phenylphenacyl)oxamoyl chlorides 1 with amines. Reaction of N-aroyl-N′-ethoxyoxalyl-phenylhydrazines 2 with unsubstituted amidrazones leads to functionalized 1,2,4-triazines which undergo ring-closure to give l,2,4-triazino[5,6-e][1,3,4] oxadiazine derivatives.