Premium
Electron impact behaviour of trans ‐4‐benzoylamino‐2 H ‐1‐benzopyran‐3‐ols: Evidence for an oxygen migration with loss of a benzopyranone
Author(s) -
Evans John M.,
Organ Andrew J.,
Sims Jonathan L.
Publication year - 1995
Publication title -
journal of mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.475
H-Index - 121
eISSN - 1096-9888
pISSN - 1076-5174
DOI - 10.1002/jms.1190300712
Subject(s) - chemistry , benzonitrile , benzopyran , oxygen , mass spectrum , medicinal chemistry , electron ionization , ion , stereochemistry , organic chemistry , ionization
Certain abundant peaks in the electron impact mass spectra of a series of trans ‐4‐benzoylamino‐2 H ‐1‐benzopyran‐3‐ols involve the formation of a substituted N ‐alkylated benzonitrile ion by a mechanism involving migration of oxygen, in a postulated four‐centre skeletal rearrangement, leading to the loss of a benzopyranone. The presence of a small range of differing substituents at three locations in this series was studied for their effects on this proposed mechanism.