Výsledky vyhledávání - "Kh. Sh. Khariton"

Mass-spectrometric study of physiologically active β-thiosemicarbazones of N-alkylisatins

Autor: B. T. Oloi, N. I. Chmykhova, G. I. Zhungietu, Kh. Sh. Khariton, M. A. Rekhter

Publikováno v: Chemistry of Heterocyclic Compounds. 15:66-70

The molecular ions of isatin (I) and N-methyl- (II) and N-ethylisatin (III) β-thiosemicarbazones undergo fragmentation via many pathways with the elimination of NH3, H2S, CO, CH2N2, CHN3, CH2N2S, CH2NS, and CHNS particles; this is due to primary loc

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::234884a0b5c39ea4bbdee6adc52caf52
https://doi.org/10.1007/bf00471202

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Mass-spectrometric investigation of the abienols — Diterpene alcohols

Autor: Kh. Sh. Khariton, P. F. Vlad, M. N. Koltsa, O. D. Bordakh

Publikováno v: Chemistry of Natural Compounds. 10:24-28

1. The synthesis of the previously undescribed Δ13-trans-neoabienol has been performed. 2. A comparative mass-spectrometric investigation of five isomeric and stereoisomeric abienols has been performed. 3. It has been shown that all five abienols ca

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::202945d60f3affe738e886d0ec8f276e
https://doi.org/10.1007/bf00568213

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Mass spectrometric study of isatins II. N-propyl(allyl, propargyl)isatins

Autor: G. I. Zhungietu, Kh. Sh. Khariton, M. A. Rekhter, N. I. Chmykhova, B. T. Oloi, N. P. Dormidontova

Publikováno v: Chemistry of Heterocyclic Compounds. 13:515-518

The mass spectra of N-propyl- (I), N-allyl- (IV), and N-propargylisatin (VII) and their 5-methyl (II, V, VIII) and 7-methyl (III, VI, and IX) derivatives were recorded. It is shown that a portion of the [M-2CO]+ ions in the mass spectra of N-propargy

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1801e756255fc755ade0b3c85c2ce6c1
https://doi.org/10.1007/bf00473197

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Transformation products of sclareol IV. Stereochemistry and mass-spectrometric fragmentation of some bicyclohomofarnesane oxides

Autor: Kh. Sh. Khariton, P. F. Vlad, M. N. Koltsa

Publikováno v: Chemistry of Natural Compounds. 14:381-385

The stereochemistries of three oxides of the bicyclohomofarnesane series have been established by spectral and chemical methods.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3d0673ae21c786e3d631ba83ed727fe8
https://doi.org/10.1007/bf00565238

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Mass-spectrometric investigation of isatins

Autor: G. I. Zhungietu, Kh. Sh. Khariton, B. T. Oloi, M. A. Rekhter, N. I. Chmykhova

Publikováno v: Chemistry of Heterocyclic Compounds. 11:840-843

It is shown that in the mass spectra of N-alkylisatins with a normal C1-C10 chain the intensity of the [M-CO]+- and [M-(2CO)]+. peaks characteristic for isatin and N-methylisatin decreases as the alkyl radical is lengthened, whereas the intensity of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::57fba046c628c982252441b26bdb63c6
https://doi.org/10.1007/bf00497309

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Mass spectrometric study of isatins III. Isatin and N-methylisatin ketals

Autor: M. A. Rekhter, N. I. Chmykhova, G. I. Zhungietu, V. I. Gorgos, Kh. Sh. Khariton

Publikováno v: Chemistry of Heterocyclic Compounds. 13:518-521

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 a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9d74040f8d1cef0c34e9c5861bc94e74
https://doi.org/10.1007/bf00473198

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