The electron impact mass spectra of imethyltetrazolo [ 1,5-c] pyrimidin-Y6H)-one, its 7-and &methyl derivatives, three &halo derivatives and two related nucleosides are reported. On the basis of the high-resolution data and detected metastable ions, the fragmentation routes of their molecular ions a
Mass spectrometry of some new pyrimidine derivatives: Electron impact-induced decomposition of 5-alkyl-5-acylamino-6-imino-1,2,5,6-tetrahydro-2(1H)-thioxopyrimidin-4(3H)-ones
✍ Scribed by Adam S. Plaziak; Bozenna Golankiewicz; Joanna Zeidler; Krzysztof Golankiewicz
- Publisher
- John Wiley and Sons
- Year
- 1989
- Tongue
- English
- Weight
- 258 KB
- Volume
- 24
- Category
- Article
- ISSN
- 1076-5174
No coin nor oath required. For personal study only.
✦ Synopsis
The mass fragmentation of some new 5-substituted derivatives of Cimino-1,2,5,Ctetrahydro-2(1~ thioxopyrimidin-4(3H)-one are reported. Electron impact-induced decompositions occurred primarily on the substituents localized in the Iposition of the series.
📜 SIMILAR VOLUMES
Electron impact mass spectra are reported for a series of and 4benzylidene-4,5-dibyydrooxazin-6-ones.
## Abstract The reaction of 1‐aryl‐3‐(dimethylamino)‐1‐propanones 1 with one equivalent of 4,5‐diamino‐1__H__‐pyrimidin‐6‐ones 2, in acidic medium, leads to the formation of 4‐aryl‐2,3,6,7‐tetrahydro‐1__H__‐pyrimido[4,5‐__b__]‐[1,4]diazepin‐6‐ones 3. The structure elucidation of the products is bas
Stereochemical effects on the electron-impact (El)-induced fragmentation of cis/trans-and diendo/diexo-fused stereoisomers of several 2,3dihydrothiazolo[3,2+]pyrimidin-5-ones and 3,4-dihydropyrimido[2,1-b]thiazinh n e s annelated to various saturated and unsaturated carbocycles were studied. The ret