THE THERMAL REVERSIBILITY OF THE MICHAEL REACTION: II. NITROKETONES AND RELATED COMPOUNDS

摘要: In continuation of the study thermal reversibility Michael adducts, 13 γ-nitroketones were examined in mass spectrometer, using inlet heated at 230°. The presence furans was indicated, arising from intact molecule. Such remotely related substances would never have been envisaged had not spectrum available. contrast to behavior delta ketonic nitriles (Part I) only normal retrogression found. There many secondary products resulting extensive decomposition expected nitro addend. Not all can be isolated by classical procedures, but their is predictable, and shown use spectrometer. Nine simple nitro- bromonitro-ethylenes, sensitive heat alone, unexpectedly stable did give rise very small amounts products. Phenyl- 1-naphthyl-nitromethanes, which decomposed completely, gave comparable types Most ...