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New alkamide and ent-kaurane diterpenoid derivatives from Senecio erechtitoides (Asteraceae)

NDom, J. C., Mbafor, J. T., Meva'a, L. M., Kakam, Z., Phanuel, A. S., Ndongo, E., Harwood, L. M. and Mpondo, T. N. (2010) New alkamide and ent-kaurane diterpenoid derivatives from Senecio erechtitoides (Asteraceae). Phytochemistry Letters, 3 (4). pp. 201-206. ISSN 1874-3900

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To link to this article DOI: 10.1016/j.phytol.2010.07.007

Abstract/Summary

Fractionation of a MeOH/CH2Cl2 (1/1) extract of the aerial parts of Senecio erechtitoides led to the isolation of six compounds including the hitherto unknown N-phenethylamide derivative named N-(p-hydroxyphenethyl)pentacosanamide (1), and a kauranoid derivative named derivative named ent-7-oxo-16 alpha,17-dihydroxykauran-19-oic acid (2), as well as four known compounds, ent-Kaur-16-en-19-oic acid (3), ent-7 beta-hydroxykaur-16-en-19-oic acid (4), ent-7-oxokaur-16-en-19-oic acid (5), steppogenin 4′-O-beta-d-glucoside (6). Their structures and relative configurations were elucidated on the basis of spectroscopic methods, chemical reactions, and comparison with previously known analogs. All isolates were evaluated for their antimicrobial activity and only diterpenoids were found to possess a potent inhibitor effect against the range of microorganism.

Item Type:Article
Refereed:Yes
Divisions:Faculty of Life Sciences > School of Chemistry, Food and Pharmacy > Department of Chemistry
ID Code:16121
Publisher:Elsevier

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