Chemistry of Natural Compounds

, Volume 28, Issue 1, pp 88–90 | Cite as

Spatial structure of diacetyldihydroungminorine

  • B. Tashkhodzhaev
  • M. R. Yagudaev


The structure of diacetyldihydroungminorine, C21H25NO7 (I), has been determined by the x-ray structural method: diffractometer, CuKα radiation, 1278 reflections, R=0.089. An analysis has been made of the conformation of the (I) molecule in comparison with that observed for dihydrolycorine in solution and in the crystalline form. It was shown that the conformations of rings B, C, and D of the (I) molecule in the crystal and of dihydrolycorine in solution are identical. The lack of correspondence of the crystal-solution conformations in dihydrolycorine is connected with an inversion of the unshared electron pair of the nitrogen atom on the formation of a salt — the hydrobromide.


Nitrogen Organic Chemistry Nitrogen Atom Spatial Structure Electron Pair 
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Copyright information

© Plenum Publishing Corporation 1992

Authors and Affiliations

  • B. Tashkhodzhaev
  • M. R. Yagudaev

There are no affiliations available

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