Springer Nature is making SARS-CoV-2 and COVID-19 research free. View research | View latest news | Sign up for updates

Mass-spectrometric distinction of linear and angular 2,2'-dimethyl-3'-oxo-dihydropyranocoumarins


The mass spectra of linear and angular 2′,2′-dimethyl-3′-oxodihydropyranocoumarins and their deuterium analogs have been studied. A basic mass-spectrometric difference between these substances has been found which consists in the greater stability of the fragment (M - CO)+. for the linear isomer than for the angular isomer. A hypothesis has been put forward on the most probable route for the formation of the ion (M - 2CO - H)+ in the mass spectra of the compounds mentioned.

This is a preview of subscription content, log in to check access.

Literature cited

  1. 1.

    M. Shipchandler and T. O. Soine, J. Pharm. Sic.,57, 2062 (1968).

  2. 2.

    L. G. Avramenko, G. K. Nikonov, and M. G. Pimenov, Khim. Prirodn. Soedin., 190 (1968).

  3. 3.

    A. I. Sokolova and G. K. Nikonov, Khim, Prirodn. Soedin., 318 (1969).

  4. 4.

    G. P. Shavora and A. D. Turova, Second Symposium on the Study of Natural Coumarins (Abstracts of Lectures) [In Russian], Leningrad (1970), p. 8].

  5. 5.

    R. G. Cooks and D. H. Williams, Chem, Commun., 663 (1968).

  6. 6.

    P. I. Zakharov, P. B. Terent'ev, and G. K. Nikonov, Khim. Prirodn. Soedin., 212 (1977).

  7. 7.

    N. E. Ermatov, A. I. Ban'kovskii, and M. E. Perel'son, Khim. Prirodn. Soedin., 52 (1969).

Download references

Additional information

M. V. Lomonosov Moscow State University. Patrice Lumumba International Friendship University, Moscow. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 664–668, September–October, 1977.

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Zakharov, P.I., Terent'ev, P.B. & Nikonov, G.K. Mass-spectrometric distinction of linear and angular 2,2'-dimethyl-3'-oxo-dihydropyranocoumarins. Chem Nat Compd 13, 551–553 (1977).

Download citation


  • Mass Spectrum
  • Coumarin
  • Monohydroxy
  • Atomic Mass Unit
  • Linear Isomer