A second polymorph of Β-arteether
Acta Crystallographica Section E: Structure Reports Online, ISSN: 1600-5368, Vol: 64, Issue: 3, Page: o585-6
2008
- 5Citations
- 13Captures
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Metrics Details
- Citations5
- Citation Indexes5
- CrossRef3
- Captures13
- Readers13
- 13
Article Description
The crystal structure of the title compound, C17H28O5, reported here is a polymorph of the structure first reported by El-Feraly, Al-Yahya, Orabi, McPhail & McPhail [J. Nat. Prod. (1992). 55, 878-883]. It is a derivative of the anti-malaria compound artemisinin and consists primarily of three substituted ring systems fused together. A cyclo-hexane ring (distorted chair conformation) fused to a tetra-hydro-pyran group (distorted chair) is adjacent to an oxacyclo-heptane unit containing an endo-peroxide bridge, giving the mol-ecule its particular three-dimensional arrangement. The crystal packing is stabilized by inter-molecular C - H⋯O inter-actions between an O atom from the endo-peroxide bridge and H atoms from both the cyclo-hexane and seven-membered oxacyclo-heptane fused rings, as well as between an O atom and H atom from adjacent tetra-hydro-pyran rings. The two polymorphs have the same space group and similar cell parameters for the a and b axes, but significantly different values for the c axis. © 2008 International Union of Crystallography.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=40249085838&origin=inward; http://dx.doi.org/10.1107/s1600536807062812; http://www.ncbi.nlm.nih.gov/pubmed/21201924; https://journals.iucr.org/paper?S1600536807062812; http://scripts.iucr.org/cgi-bin/paper?S1600536807062812; http://journals.iucr.org/e/issues/2008/03/00/at2510/at2510.pdf; https://dx.doi.org/10.1107/s1600536807062812; https://journals.iucr.org/e/issues/2008/03/00/at2510/index.html
International Union of Crystallography (IUCr)
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