Extractives from the Meliaceae and Ptaeroxylaceae.
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Date
2001
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Abstract
This work is an account of the extractives from one member of the Meliaceae and one member of the
Ptaeroxylaceae. In all, thirteen compounds have been isolated, of which four have not been described
previously.
Neobeguea mahafalensis belongs to the Neobeguea genus and has been classified into the Swietenieae
subfamily of the Meliaceae. Neobeguea mahafalensis seeds obtained from Madagascar were investigated
for the presence of limonoids. This is the first time extracts of the seeds were investigated. Previous work
was done on the stem bark of this species. An andirobin-type limonoid, methyl angolensate (5), two
mexicanolide-type limonoids, mexicanolide (6), khayasin (7), and three protolimonoids, sapelin E acetate
(8), sapelin C (9) and grandifoliolenone (10), have been isolated in this work. One of these was novel.
Cedrelopsis grevei belongs to the Cedrelopsis genus and has been classified into the Ptaeroxylaceae
family. Extracts from the stem bark of Cedrelopsis grevei obtained from Madagascar yielded seven
compounds, a triterpenoid, β-amyrin (15), a coumarin, scoparone (16), a limonoid, cedmiline (14), a
triterpenoid derivative, cedashnine (17), a quassinoid, cedphiline (19), a lignan, cedpetine (18) as well as
sitosteryl β-D-glucopyranoside (20). Three of these were novel.
Description
Thesis (M.Sc.)-University of Natal, Durban, 2001.
Keywords
Meliaceae., Ptaeroxylaceae., Plants--Analysis., Limonoids., Theses--Chemistry.