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

A study of the structure and stereochemistry of ungernia alkaloids by NMR spectroscopy

  • 24 Accesses

  • 1 Citations


1. In a study of the NMR spectra of ungerine, dihydroungerine, hippeastrine, hippeastrine acetate, dihydrohippeastrine, dihydrohippeastrine acetate, and unsevine it has been shown that the B and C rings in these compounds have a cis linkage.

2. It has been found that, in contrast to the alkaloid clivonine, in dihydrohippeastrine the B/C ring-linkage is cis, and the N-CH3 group is located above the plane of the benzene ring.

3. The orientations of the H5, H5a, and H11b protons and the substituent OR at C5 of ring C have been established.

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


  1. 1.

    M. R. Yagudaev, Kh. A. Abduazimov, and S. Yu. Yunusov, KhPS [Chemistry of Natural Compounds], 5, 99, 1969.

  2. 2.

    S. L. Portnova, Yu. N. Sheinker, A. A. Akhrem, A. M. Prokhoda, and A. V. Kamernitskii, ZhOrKh, 3, 44, 1967.

  3. 3.

    W. A. Hawksworth, P. W. Jeffs, B. K. Tidd, and T. P. Toube, J. Chem. Soc., 1991, 1965.

  4. 4.

    W. Döpke, M. Bienert, P. W. Jeffs, and D. S. Farrier, Tetrah. Let., no. 5, 451, 1967.

Download references

Author information

Additional information

Khimiya Prirodnykh Soedinenii, Vol. 6, No. 1, pp. 94–97, 1970

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Yagudaev, M.R., Abduazimov, K.A. & Yunusov, S.Y. A study of the structure and stereochemistry of ungernia alkaloids by NMR spectroscopy. Chem Nat Compd 6, 88–91 (1970). https://doi.org/10.1007/BF00564166

Download citation


  • Lactone Carbonyl
  • Methylenedioxy Group
  • Stereochemical Feature
  • Double Resonance Method
  • Hippeastrine