Mass Spectrometry of Substituted 1H,6H-Pyrano[2,3-c]pyrazol-6-ones
Corresponding Author(s) : Muhammad Naeem Khan
Asian Journal of Chemistry,
Vol. 25 No. 17 (2013): Vol 25 Issue 17 page 9639-9642
The mass spectra of some C- and N-alkyl and aryl substituted 1H,6H-pyrano[2,3-c]pyrazol-6-ones are presented. The fragmentation is initiated by the elimination of CO followed by a loss of hydrogen, rearrangement and then loss of a RCN group. Parallely a disproportionation gives RN2 which loses N2 to give the aromatic ion (m/z 77 or 91).
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