relation: http://publicatio.bibl.u-szeged.hu/32453/
title: Saturated heterocycles .227. Electron ionization mass spectra of some substituted stereoisomeric 1,6,7,11b‐tetrahydro‐2h,4H[1,3]oxazino[4,3‐a]‐isoquinolines and 1,6,7,11b‐tetrahydro‐2H[1,3]oxazino [4,3‐a]‐isoquinolin‐4‐ones
creator:  Joutsiniemi K.
creator:  Vainiotalo P.
creator:  Lázár László
creator:  Fülöp Ferenc
creator:  Bernáth Gábor
subject: 01.04. Kémiai tudományok
subject: 01.06. Biológiai tudományok
subject: 03.01. Általános orvostudomány
description: The mass spectra of ten substituted oxazino[4,3-a]isoquinolines, two isoquino[2,1-c][1,3]benzoxazines and seven substituted oxazino[4,3-a]isoquinolin-4-ones were recorded under electron impact ionization. Fragmentations were examined by metastable ion analysis, collision induced dissociation and exact mass measurement. The oxazinoisoquinolines and oxazinoisoquinolin-4-ones behaved similarly, although there were a few differences in the fragmentation and especially in the peak intensities. The most important fragmentation began with the opening of the oxazole ring. The substituents affected the fragmentation of the isomeric compounds, whereas the spectra of the stereoisomeric compounds were identical, The two isoquinobenzoxazines differed noticeably from the other compounds in their fragmentation behaviour; the additional phenyl ring prompted entirely new fragmentations unique to this structure.
date: 1995
type: Folyóiratcikk
type: PeerReviewed
format: text
identifier: http://publicatio.bibl.u-szeged.hu/32453/1/aok_klny_82_95.pdf
identifier:     Joutsiniemi K.;  Vainiotalo P.;  Lázár László;  Fülöp Ferenc;  Bernáth Gábor: Saturated heterocycles .227. Electron ionization mass spectra of some substituted stereoisomeric 1,6,7,11b‐tetrahydro‐2h,4H[1,3]oxazino[4,3‐a]‐isoquinolines and 1,6,7,11b‐tetrahydro‐2H[1,3]oxazino [4,3‐a]‐isoquinolin‐4‐ones.   RAPID COMMUNICATIONS IN MASS SPECTROMETRY, 9 (11).  pp. 998-1002.  ISSN 0951-4198 (1995)     
identifier: doi:10.1002/rcm.1290091105
relation: https://doi.org/10.1002/rcm.1290091105
relation: 27992
language: eng