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Mba’ning BM, Ndjakou BL, Talontsi FM, Lannang AM, Dittrich B, Ngouela SA, Tsamo E, Sewald N, Laatsch H. Salaterpene E, a eudesmane-type sesquiterpene from Salacia longipes var. camerunensis. ACTA ACUST UNITED AC 2016. [DOI: 10.1515/znb-2015-0106] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Abstract
A mixture of two compounds with potent antiplasmodial activity in vitro against the W2 strain of Plasmodium falciparum (half maximal inhibitory concentration, 1.12 μg/mL) was obtained in a previous investigation of the CH2Cl2-MeOH extract of the seeds of Salacia longipes var. camerunensis. Separation by column chromatography led now to the isolation of salaterpene E (1) and (1R,2R,4S,5S,6R,7R,9S,10R)-2-acetoxy-1,6,9-tribenzoyloxy-4-hydroxy-dihydro-β-agarofuran (2). The structure of 1 was elucidated by spectroscopic analysis, and its absolute configuration was established unambiguously by means of single-crystal X-ray diffraction. Also the absolute configurations of the recently described salaterpenes A (2a) and D (2b) were determined by this method using the anomalous scattering of the oxygen atoms only.
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Affiliation(s)
| | - Bruno Lenta Ndjakou
- Department of Chemistry, Higher Teacher Training College, University of Yaoundé 1, P.O. Box 47, Yaoundé, Cameroon
| | - Ferdinand Mouafo Talontsi
- Institute of Environmental Research (INFU), Department of Chemistry and Chemical Biology, Technical University of Dortmund, Otto-Hahn-Strasse 6, D-44221 Dortmund, Germany
| | - Alain Meli Lannang
- Department of Chemistry, Organic, and Bioorganic Chemistry, Bielefeld University, D-33501 Bielefeld, Germany
| | - Birger Dittrich
- Institute of Inorganic Chemistry, University of Göttingen, Tammannstrasse 4, D-37077 Göttingen, Germany
| | | | - Etienne Tsamo
- Department of Organic Chemistry, University of Yaoundé 1, Yaoundé, Cameroon
| | - Norbert Sewald
- Department of Chemistry, Organic, and Bioorganic Chemistry, Bielefeld University, D-33501 Bielefeld, Germany
| | - Hartmut Laatsch
- Institute of Organic and Biomolecular Chemistry, University of Göttingen, Tammannstrasse 2, D-37077 Göttingen, Germany
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Abstract
This review covers the isolation and structure determination of triterpenoids including squalene derivatives, lanostanes, holostanes, cycloartanes, cucurbitanes, dammaranes, euphanes, tirucallanes, tetranortriterpenoids, quassinoids, lupanes, oleananes, friedelanes, ursanes, hopanes, onoceranes and saponins; 308 references are cited.
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Affiliation(s)
- Robert A Hill
- School of Chemistry, Glasgow University, Glasgow G12 8QQ, UK.
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