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Report | Regular issue | Vol 20, No. 12, 1983, pp.2385-2390
Published online, 1st January, 1970
DOI: 10.3987/R-1983-12-2385
■ A Novel Heterocyclic Rearrangement: Conversion of Benzoyl Pyrazolines into Phenylpyridazinones

Ch. Bheemasankara Rao, P. V. Narasimha Raju, Robert Flammang, André Maquestiau, and José Elguero

*Instituto de Química Médica, C. S. I. C., Calle Juan de Cierva, 3, 28006 Madrid, Spain

Abstract

Diarylpyridazinones could be obtained, in a two-step procedure, from chalcones and diazomethane. The second step involves the rearrangement of a benzoylpyrazoline and proceeds with low yields. The structures have been established by mass and ion-kinetic energy spectrometry.