Electron impact mass spectra of 3,6-bis-aryl-4H-v-triazolo[1,5-d][1,3,4]oxadiazines
โ Scribed by Nestor A. Rodios; Nicholas E. Alexandrou
- Publisher
- John Wiley and Sons
- Year
- 1986
- Tongue
- English
- Weight
- 185 KB
- Volume
- 21
- Category
- Article
- ISSN
- 1076-5174
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๐ SIMILAR VOLUMES
Fragmentation pathways of the title compounds were studied using accurate mass measurements and collision-induced dissociation spectra. Substituents in the ortho position of the aryl group at the pyrimidine ring were found to play a special role in the electron impact (EI) induced fragmentation of t
The mass spectrometric behaviour of six 3a,5-disubstituted 1,3-diphenyl-3a,4,5,6-tetrahydro-3H-1,2,4triazolo[4,3-a][1,5]benzodiazepines 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
## Abstract Starting from pyrimido[4,5โe][1,3,4]oxadiazines **(****3a**, **3b**, **3c****)**, a synthetic pathway to [1,2,4]triazolo[4โฒ,3โฒ:1,2]pyrimido[4,5โe][1,3,4]oxadiazines **(****5a**, **5b**, **5c**, **5d**, **5e**, **5f**, **5g**, **5h**, **5i****)** is described. The reaction of pyrimido[4,