Mass Spectrometry of Substituted 1H,6H-Pyrano[2,3-c]pyrazol-6-ones

Nadia Asif,Faryal Chaudhry,Muhammad Naeem Khan, Alina Guerra Cosenza, Gwynn Penant Ellis, Misbahul Ain Khan,Munawar Ali Munawar,Sana Iqbal,Noreen Aslam

ASIAN JOURNAL OF CHEMISTRY（2013）

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摘要

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 N-2 to give the aromatic ion (m/z 77 or 91).

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关键词

1H,6H-Pyrano[2,3-c]pyrazol-6-ones,Fragmentation,Disproportionation

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