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Features of the mass spectra of C18-diterpene alkaloids

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Abstract

Fragmentation under electron impact of eleven C18-diterpene alkaloids with an oxygen function at C-4 has been investigated. The contributions of various modes of forming the (M - CH3)+ ions have been determined. The mechanism of the appearance of the fragments (M - CH3)+ and (M - OCH3)+ at the expense of the methoxy groups at C-14 and C-16 has been considered. The characteristic nature of the parameters of the metastable peaks in the transitions to these daughter ions has been shown. Minor directions of the fragmentation of 3,4-epoxy- and 4-hydroxy bases have been characterized.

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Authors
  1. E. G. Sirotenko
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  2. Ya. V. Rashkes
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  3. V. A. Tel'nov
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  4. M. S. Yunusov
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Additional information

Institute of the Chemistry of Plant Substances, Uzbek SSR Academy of Sciences, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 95–106, January–February, 1989.

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Sirotenko, E.G., Rashkes, Y.V., Tel'nov, V.A. et al. Features of the mass spectra of C18-diterpene alkaloids. Chem Nat Compd 25, 84–93 (1989). https://doi.org/10.1007/BF00596709

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  • DOI: https://doi.org/10.1007/BF00596709

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