The electron impact mass spectra of fifteen 5-substituted-2-aminc&2-oxazolines classified in two series according to the nature of the substituent are discussed. For the 5-(l-aryl-4-piperazino)methyl compounds the main fragments are derived from the arylpiperazine moiety, whereas for the phenoxymeth
Electron impact mass spectra of substituted 2-OTMS-acetophenones
✍ Scribed by N. Lichtenstein; D. Müller
- Publisher
- John Wiley and Sons
- Year
- 1985
- Tongue
- English
- Weight
- 135 KB
- Volume
- 20
- Category
- Article
- ISSN
- 1076-5174
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📜 SIMILAR VOLUMES
Fragmentation pathways of the title compounds under electron impact were compared to those of their (1aryl)substituted analogs reported earlier. The main fragmentation route of the M Á ions is the sulphamide N-S bond cleavage leading to [M À ArSO 2 ] ions. No loss of the alkyl substituents from the
Table 1. The EI mass spectra, showing peaks of >5% relative abundance (RA), of compounds 1-10, using 70 eV electrons Compound m/z (% RA) 1 315(M, 55) 314(10) 161(10) 160(89) 159(13) 107(12) 106(100) 105(11) 104(9) 91(33) 77(22) 65(15) a 2 345(M, 4) 316(7) 315(19) 314(100) 190(11) 175(7) 172(5) 160(1
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