Ent-kaurene and ent-beyerene diterpenoids and other constituents of Thecacoris batesii

Bonaventure T. Ngadjui; Herve M.P. Poumale; Alphonsine N. Guedem; Merhatibeb Bezabih; Berhanu M. Abegaz

doi:10.4314/bcse.v21i1.61377

Bonaventure T. Ngadjui Department of Organic Chemistry, Faculty of Science, University of Yaoundé 1, BP 812, Yaoundé, Cameroon
Herve M.P. Poumale Department of Organic Chemistry, Faculty of Science, University of Yaoundé 1, BP 812, Yaoundé, Cameroon
Alphonsine N. Guedem Department of Organic Chemistry, Faculty of Science, University of Yaoundé 1, BP 812, Yaoundé, Cameroon
Merhatibeb Bezabih Department of Chemistry, Faculty of Science, University of Botswana, Private Bag, UB00704, Gaborone, Botswana
Berhanu M. Abegaz Department of Chemistry, Faculty of Science, University of Botswana, Private Bag, UB00704, Gaborone, Botswana

DOI: 10.4314/bcse.v21i1.61377

Keywords: Diterpenoids, Thecacorin A, Thecacorin B, Ent-3b, 20-epoxy-16-kaurene-3a, 12b-diol, Ent-15-beyerene-2b, 3b-diol, Thecacoris batesii

Abstract

Two novel diterpenoids, thecacorins A (1) and B (2), were isolated from Thecacoris batesii and their structures were established as ent-3b,20-epoxy-16-kaurene-3a,12b-diol and ent-15-beyerene-2b,3b-diol, respectively, on the basis of extensive spectroscopic analysis, especially, 1D NMR spectra, in conjunction with 2D experiments, COSY, NOESY, HMQC and HMBC.

KEY WORDS: Diterpenoids, Thecacorin A, Thecacorin B, Ent-3b,20-epoxy-16-kaurene-3a,12b-diol, Ent-15-beyerene-2b,3b-diol, Thecacoris batesii

Bull. Chem. Soc. Ethiop. 2007, 21(1), 89-94.

***Ent-kaurene and ent-beyerene diterpenoids and other constituents of Thecacoris batesii***

Abstract

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