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Mass spectra of aromatic 3‐methylisoxazolo‐ and 2‐methyloxazolopyridines
Author(s) -
Ponticelli Fabio,
Giomi Donatella,
Papaleo Sandro,
Tedeschi Piero
Publication year - 1993
Publication title -
organic mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.475
H-Index - 121
eISSN - 1096-9888
pISSN - 0030-493X
DOI - 10.1002/oms.1210280431
Subject(s) - fragmentation (computing) , mass spectrum , chemistry , spectral line , mass spectrometry , high resolution , ion , polyatomic ion , analytical chemistry (journal) , high mass , physics , organic chemistry , chromatography , astrophysics , geology , remote sensing , astronomy , computer science , operating system
The fragmentation patterns of aromatic 3‐methylisoxazolo‐ and 2‐methyloxazolopyridines were investigated by high‐resolution mass spectrometry and collisionally activated B/E and B 2 / E linked scans. The isoxazolopyridines give mass spectra near identical with those of the corresponding oxazolopyridines, both showing mainly a competitive loss of CO and CH 3 CN from the molecular ion. However, the ratio of these concomitant pathways depends substantially on the type of fusion between the five‐ and six‐membered rings.
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