Abstract
In contrast to isatin and N-methylisatin, their ethylene-, propylene-, and 2,3-butyleneketals undergo fragmentation via several pathways. In addition to the principal fragmentation pathway — successive loss by the molecular ion (M+) of a CO group and a dioxolane ring or its fragment, the M+ ions of the ketals are also fragmented with elimination of a dioxolane fragment or the substituent attached to the nitrogen atom and, subsequently, a fragment of the dioxolane ring. The fragmentations of some of the fragment ions were investigated by means of the mass spectra of N-trideuteromethyl analogs.
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See [2] for communication II.
Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 5, pp. 642–645, May, 1977.
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Zhungietu, G.I., Chmykhova, N.I., Gorgos, V.I. et al. Mass spectrometric study of isatins III. Isatin and N-methylisatin ketals. Chem Heterocycl Compd 13, 518–521 (1977). https://doi.org/10.1007/BF00473198
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DOI: https://doi.org/10.1007/BF00473198