ELECTRON-IMPACT MASS-SPECTROMETRY AND METASTABLE ION STUDIES ON 2-[3-HYDROXY-2-PYRIDYL]-2-(3H)-THIAZOLIMINE AND 1,3,4-THIADIAZINE DERIVATIVES

Authors
HADJIEVA P KALCHEVA V TOSHEVA M DANIELI B CATINELLA S
Citation
P. Hadjieva et al., ELECTRON-IMPACT MASS-SPECTROMETRY AND METASTABLE ION STUDIES ON 2-[3-HYDROXY-2-PYRIDYL]-2-(3H)-THIAZOLIMINE AND 1,3,4-THIADIAZINE DERIVATIVES, Rapid communications in mass spectrometry, 7(6), 1993, pp. 449-453
Citations number
6
Categorie Soggetti
Spectroscopy,"Chemistry Analytical
Journal title
Rapid communications in mass spectrometry → ACNP
ISSN journal
09514198
Volume
7
Issue
6
Year of publication
1993
Pages
449 - 453
Database
ISI
SICI code
0951-4198(1993)7:6<449:EMAMIS>2.0.ZU;2-Y
Abstract
The mass spectrometric behaviour of some 2-[3-hydroxy-pyridyl]-2-(3H)- thiazolimine and 1,3,4-thiadiazine derivatives was studied in detail u nder electron ionizing conditions by means of accurate mass measuremen ts, deuterium-labelling experiments and metastable ion studies. The re sultant fragmentation patterns were highly complicated with cleavage o f the amine bond and of the thiazoline ring. The main differences betw een the decomposition mechanism of thiazoline and thiadiazine derivati ves lies in the retro-synthetic ring transformation processes, observe d in the case of thiadiazine compounds only.