Mass Spectra of New Heterocycles. XVII. Main Fragmentation Routes of Molecular Ions of 4-Alkoxy-5-amino-3-methylthiophene-2-carbonitriles under Electron and Chemical Ionization
- Autores: Klyba L.V.1, Nedolya N.A.1, Sanzheeva E.R.1, Tarasova O.A.1
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Afiliações:
- Favorskii Irkutsk Institute of Chemistry, Siberian Branch
- Edição: Volume 54, Nº 8 (2018)
- Páginas: 1184-1188
- Seção: Article
- URL: https://bakhtiniada.ru/1070-4280/article/view/218574
- DOI: https://doi.org/10.1134/S1070428018080110
- ID: 218574
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Resumo
For the first time decomposition was investigated of 4-alkoxy-5-amino-3-methylthiophene-2-carbonitriles under the conditions of electronic (70 eV) and chemical (reagent gas methane) ionization. At the electronic ionization the compounds under study [except for 4-(1-ethoxyethoxy) and 4-(ferrocenylmethoxy) derivatives] form stable molecular ions that decompose mainly by the cleavage of an alkyl radical from the alkoxy-substituent. Further fragmentation of the arising ion [M–Alk]+ depends on the substituent nature in the amino group. In the mass spectrum of 4-(ferrocenylmethoxy)-substituted thiophene peaks of the ion [FcCH2]+ and its fragmentation products prevail. In the mass spectra of chemical ionization predominant peaks belong to ions M+·, [M + H]+ and [M + C2H5]+, and fragment ions are absent.
Sobre autores
L. Klyba
Favorskii Irkutsk Institute of Chemistry, Siberian Branch
Autor responsável pela correspondência
Email: klyba@irioch.irk.ru
Rússia, ul. Favorskogo 1, Irkutsk, 664033
N. Nedolya
Favorskii Irkutsk Institute of Chemistry, Siberian Branch
Email: klyba@irioch.irk.ru
Rússia, ul. Favorskogo 1, Irkutsk, 664033
E. Sanzheeva
Favorskii Irkutsk Institute of Chemistry, Siberian Branch
Email: klyba@irioch.irk.ru
Rússia, ul. Favorskogo 1, Irkutsk, 664033
O. Tarasova
Favorskii Irkutsk Institute of Chemistry, Siberian Branch
Email: klyba@irioch.irk.ru
Rússia, ul. Favorskogo 1, Irkutsk, 664033
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