𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Electron impact mass spectra of phenyl 2,3-unsaturated-O-glycosides

✍ Scribed by Mohamed Brakta; Paul Lhoste; Denis Sinou; Joseph H. Banoub

Publisher
John Wiley and Sons
Year
1990
Tongue
English
Weight
170 KB
Volume
25
Category
Article
ISSN
1076-5174

No coin nor oath required. For personal study only.

✦ Synopsis

Phenyl 2,3-unsaturated-O-glycosides are very interesting starting materials for the synthesis of a large variety of 2,3unsaturated-C-glycosides.' Mass spectral fragmentations of a wide variety of acetylated glycosides have been reported2-* and some information on the relative differences in the ion abundances of common fragment ions in the spectra of anomeric glycosidic pairs is available.'-' The relative instability of the 8-anomer, due to the anomeric effect, is known to cause greater ion abundances of common ions than in the a-anomer. However, no study on the mass spectral fragmentation of phenyl2,3-unsaturated-O-glycosides has been reported.

This work was undertaken to study the fragmentation routes and the differences in the relative abundances of common fragment ions in anomeric pairs of phenyl 2,3unsaturated-0-glycosides.

πŸ“œ SIMILAR VOLUMES

Electron impact and chemical ionization
Electron impact and chemical ionization mass spectra of some unsaturated anomeric C-glycosides
✍ Mohamed Brakta; Paul Lhoste; Denis Sinou; Joseph Banoub πŸ“‚ Article πŸ“… 1991 πŸ› John Wiley and Sons 🌐 English βš– 320 KB

Electron impact mass spectra at 70 eV electron energy and chemical ionization mass spectra with ammonia as the reagent gas are reported for certain unsaturated C-glycosides. Comparisons are made between the mass spectra of anomeric pairs of these glycosides. ## 246 ( 5.8). 228 (1.2), 181 (1.5), 15

Electron impact mass spectra of 1-methyl
Electron impact mass spectra of 1-methyl-3-(2-benzothiazolylhydrazono)-2-indolinones
✍ R. S. Varma; A. P. Singh; S. P. Singh πŸ“‚ Article πŸ“… 1992 πŸ› John Wiley and Sons 🌐 English βš– 129 KB

A study of the fragmentation of 1-methyl-3-(2-benzothiazolyllhydrazono)-2-indolinone on electron impact reveals that the major processes involve N-N bond fission and the competing loss of CO from the molecular ion.