Flash vacuum pyrolysis of 3-oxo-2-arylhydrazonopropanals and related derivatives

Flash vacuum pyrolysis (FVP) of 3-oxo-2-arylhydrazonopropanals at 500°C and 0.02 Torr yielded the corresponding derivatives of anilines, N-formylanilines, N-benzoylanilines and benzoylnitriles. Similar FVP of phenylhydrazonomalononitrile, phenylhydrazonoacetylacetone and phenylhydrazono ethyl cyanoacetate gave aniline in addition to N-cyanoaniline and 3,6-dicyano-1,4-diphenyl-1,2,4,5-tetrazine, acetanilide, N-methylacetanilide, pyruvonitrile and N-phenylurethane.