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Fragmentation studies of synthetic 2-acylamino-1,4-naphthoquinones by electrospray ionization mass spectrometry

✍ Scribed by Ricardo Vessecchi; Paulo G. B. D. Nascimento; José N. C. Lopes; Norberto P. Lopes

Publisher
John Wiley and Sons
Year
2006
Tongue
English
Weight
234 KB
Volume
41
Category
Article
ISSN
1076-5174

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✦ Synopsis

Abstract

We report here the fragmentation mechanism for five 2‐acylamino‐1,4‐naphthoquinone derivatives using electrospray ionization tandem mass spectrometry (ESI‐MS/MS). Analyses were performed on a low‐resolution, triple‐quadrupole mass spectrometer. Fragmentation pathways for protonated molecular derivatives 2‐acylamino‐1,4‐naphthoquinone [M + H]^+^ are proposed on the basis of theoretical calculations. There is evidence that the nitrogen atom is the protonation site, based on the nucleophilic atomic indices. Copyright © 2006 John Wiley & Sons, Ltd.

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