Original scientific paper

Crystal and Molecular Structure of Chelidonine

Bela Ribar ; Academy of Sciences and Arts of Vojvodina, Ul. Svetozara Markovića 6, 21000 Novi Sad, Yugoslavia
Agneš Kapor ; Faculty of Sciences, Institute of Physics, Ilije Đuričića 4, 21000 Novi Sad, Yugoslavia
Csaba Mezsaros ; Faculty of Sciences, Institute of Physics, Ilije Đuričića 4, 21000 Novi Sad, Yugoslavia
Olga Gašić ; Faculty of Sciences, Institute of Chemistry, Ilije Đuričića 4a, 21000 Novi Sad, Yugoslavia
Peter Engel ; Universitat Bern, Laboratorium fur chemische und mineralogische Kristallographie, 3012 Bern, Freiestrasse 3, Switzerland

Abstract

The crystal and molecular structure of benzophenantridine alkaloid chelidonine, C20H19N05 CM = 353.37) was solved by direct methods and refined by the least-squares technique to a conventional R index of 0.117 for 1888 unique reflections. The crystals are monoclinic, space group P21. Both, B and C rings have half chair conformation and are in cis junction. The N-methyl and C14-hydroxyl groups are in equatorial and axial positions, respectively. The OH-group forms intramolecular
hydrogen bond with N atom. Conformation of the molecule is quite different from that found in chelidonine-p-brombenzoate\CBB).

Keywords

Hrčak ID:

176513

URI

https://hrcak.srce.hr/176513

Publication date:

26.3.1991.

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