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Electron impact mass spectral studies of 2a,4‐disubstituted 2‐phthalimido‐2,2a,3,4‐tetrahydro‐1 H ‐azeto[2,1‐ d ][1,5]benzothiazepin‐1‐ones
Author(s) -
Xu Jiaxi,
Zuo Gang
Publication year - 2000
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/1097-0231(20001230)14:24<2373::aid-rcm173>3.0.co;2-q
Subject(s) - chemistry , electron ionization , cycloaddition , ion , mass spectrometry , molecule , kinetic energy , phthalimide , ionization , styrene , propene , mass spectrum , polyatomic ion , photochemistry , computational chemistry , medicinal chemistry , organic chemistry , catalysis , physics , polymer , chromatography , quantum mechanics , copolymer
The mass spectrometric behaviour of seven 2a,4‐disubstituted 2‐phthalimido‐2,2a,3,4‐tetrahydro‐1 H ‐azeto[2,1‐ d ][1,5]benzothiazepin‐1‐ones has been studied with the aid of mass‐analyzed ion kinetic energy spectrometry and accurate mass measurements under electron impact ionization. All compounds show a tendency to eliminate a CO molecule, a phthalimido (PhthN) radical, or a phthalimide (PhthNH) molecule. All of the resulting fragment ions could further lose a propene or (substituted) styrene molecule. The molecular ions could also undergo a reverse [2 + 2] cycloaddition reaction. Copyright © 2001 John Wiley & Sons, Ltd.