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

Issue

Vol. 25 No. 17 (2013): Vol 25 Issue 17

Issue Published : 9 November 2013

This work is licensed under a Creative Commons Attribution 4.0 International License.

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

Nadia Asif

Institute of Chemistry, University of the Punjab, Lahore, Pakistan

Faryal Chaudhry

Institute of Chemistry, University of the Punjab, Lahore, Pakistan

Muhammad Naeem Khan

Applied Chemistry Research Center, PCSIR Laboratories Complex, Lahore, Pakistan

Alina Guerra Cosenza

Secao de Quimica, Instituto Militar de Engenharia, Praia Vermelha, Rio de Janeiro, Brazil

Gwynn Penant Ellis

Department of Applied Chemistry, University of Wales Institute of Science and Technology (UWIST), Cardiff, Wales, U.K

Misbahul Ain Khan

Institute of Chemistry, University of the Punjab, Lahore, Pakistan ; Secao de Quimica, Instituto Militar de Engenharia, Praia Vermelha, Rio de Janeiro, Brazil ; Department of Chemistry, The Islamia University of Bahawalpur, Bahawalpur, Pakistan

Munawar Ali Munawar

Institute of Chemistry, University of the Punjab, Lahore, Pakistan

Sana Iqbal

Department of Chemistry, The Islamia University of Bahawalpur, Bahawalpur, Pakistan

Noreen Aslam

Department of Chemistry, The Islamia University of Bahawalpur, Bahawalpur, Pakistan

Corresponding Author(s) : Muhammad Naeem Khan

changwani_1@yahoo.com

Asian Journal of Chemistry, Vol. 25 No. 17 (2013): Vol 25 Issue 17
Article Published : 11 November 2013

Abstract

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).

Keywords

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

(1)

Asif, N.; Chaudhry, F.; Naeem Khan, M.; Guerra Cosenza, A.; Penant Ellis, G.; Ain Khan, M.; Ali Munawar, M.; Iqbal, S.; Aslam, N. Mass Spectrometry of Substituted 1H,6H-Pyrano[2,3-c]pyrazol-6-Ones. ajc 2013, 25, 9639-9642.

Issue

Vol. 25 No. 17 (2013): Vol 25 Issue 17

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

Corresponding Author(s) : Muhammad Naeem Khan

Abstract

Keywords

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