Electron ionization mass spectrometry of some substituted, stereoisomeric, partly saturated 1,3‐ and 3,1‐benzoxazino‐1,3‐benzoxazines
The electron ionization mass spectra of five substituted, partly saturated 3,1-benzoxazino-1,3-benzoxazines and four substituted 1,3-benzoxazino-1,3-benzoxazines were measured and analysed. The fragmentation pathways were elucidated by metastable ion analysis and exact mass measurement. Although the...
Elmentve itt :
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| Dokumentumtípus: | Cikk |
| Megjelent: |
1995
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| Sorozat: | RAPID COMMUNICATIONS IN MASS SPECTROMETRY
9 No. 11 |
| Tárgyszavak: | |
| doi: | 10.1002/rcm.1290091113 |
| mtmt: | 27993 |
| Online Access: | http://publicatio.bibl.u-szeged.hu/32454 |
| Tartalmi kivonat: | The electron ionization mass spectra of five substituted, partly saturated 3,1-benzoxazino-1,3-benzoxazines and four substituted 1,3-benzoxazino-1,3-benzoxazines were measured and analysed. The fragmentation pathways were elucidated by metastable ion analysis and exact mass measurement. Although the principal fragmentations were similar for all these compounds, there was an important difference between the two groups as concerns the fragmentation routes. Both routes led to the same fragment ion, but in different ways depending on the ring structure. On the basis of the different fragmentation mechanisms, the 3,1-benzoxazino-1,3-benzoxazines and the 1,3-benzoxazino-1,3-benzoxazines can be distinguished mass spectrometrically. The saturation, the stereochemistry and the substituents all affected the fragmentations, mainly the peak intensities. |
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| Terjedelem/Fizikai jellemzők: | 1035-1037 |
| ISSN: | 0951-4198 |