Oxamic Acid Derivatives in Heterocyclic Synthesis: Preparation of 1,4-Oxazine and 1,2,4-Triazinooxadiazine Derivatives

Article abstract of DOI:10.1055/s-1987-27860

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 functionaliz