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Structure‐specific fragmentations of 2,2,4‐trisubstituted 1,2‐dihydroquinazolines
Author(s) -
Ann Qinghong,
Ou Mark,
Madigan Raymond,
Adams Jeanette
Publication year - 1992
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.1210270813
Subject(s) - substituent , chemistry , electron ionization , mass spectrum , fast atom bombardment , ion , ionization , decomposition , spectral line , mass spectrometry , computational chemistry , stereochemistry , organic chemistry , physics , chromatography , astronomy
Fragmentations of a series of 2,2,4‐trisubstituted 1,2‐dihydroquinazolines were studied by electron impact (EI) ionization and positive‐ and negative‐ion fast atom bombardment (FAB) coupled with collision‐induced decomposition (CID). The EI mass spectra give information that directly indicates the specific location of each substituent. The FAB–CID spectra provide data regarding the masses of each substituent, but no definitive information regarding location.