23990-17-2Relevant academic research and scientific papers
THERMAL HETEROCYCLIZATION OF METHYL ARYL KETAZINES. I. REACTIONS OF THE TAUTOMERIC DIENEHYDRAZINE FORM
Shurukhin, Yu. V.,Klyuev, N. A.,Grandberg, I. I.
, p. 1883 - 1888 (2007/10/02)
The thermal reactions of methyl aryl ketazines in the range of 150-350 deg C were studied.Thermolysis is represented by three types of parallel-consecutive reactions of various tautomeric forms of the initial compounds, i.e., the dienehydrazine, the enehydrazine, and azine forms.The chemical transformations of the first type lead to the cyclization of the azines into derivatives of 2,5-diarylpyrrole and 3,6-diarylpyridazine.The formation of pyrroles under the conditions of uncatalyzed thermolysis and at temperatures excluding the possibility of processes involvingthe participation of radicals is consistent with the mechanism of a -sigmatropic shift.
Dihydropyridazines. III . Reactions with Oxygen
Baker, James,Hedges, Winston,Timberlake, Jack W.,Trefonas, Louis M.
, p. 855 - 859 (2007/10/02)
The reactions of oxygen with a series of dihydropyridazines have been explored.The primary reaction other than aromatization appears to occur from the 1,4-dihydro tautomer.A single crystal x-ray structure has been determined on the product from the reaction of oxygen with 3,6-diphenyl-4,4-dimethyl-1,4-dihydropyridazine.
An unusual example of a 1,1-cycloaddition reaction of a diazoalkane
Padwa, Albert,Ku, Hao
, p. 1009 - 1012 (2007/10/02)
Thermolysis of the sodium salt of E-1,4-diphenyl-3-buten-1-one N-tosylhydrazone gave rise to the corresponding diazoalkane which undergoes a subsequent 1,1-cycloaddition reaction to produce 3,6-diphenyl-1,2-diazabicyclo[3.1.0]hex-2-ene.
