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Mass Spectrometric Investigation of Some Pyronylpyrazole Derivatives

The electron impact ionization mass spectra of some pyronylpyrazoles were investigated. The 6-substituted 4-hydroxy-2-pyrone ring in all compounds fragments according to the common mechanisms. The fragmentations of the 3, 5-disubstituted N-phenylpyrazole moiety are strongly dependent on the nature and positions of the substituents.

Mass Spectra; pyronylpyrazoles; 2-pyrones; 3; 5-disubstituted N-phenylpyrazoles

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