The limonoids of the seeds of Trichilia havanensis were studied in two ripening stages.From the unripened seeds azadirone, havanensin triacetate and three new limonoids were isolated.The mature seeds contained havanensin triacetate and its hydroxy lactone derivative.The structures of the new limonoids were deduced by spectroscopic and chemical means.
Key Word Index - Walsura piscidia; Meliaceae; triterpenoids; piscidinols A-E; tetranortriterpenoids; piscidofuran. - A series of tirucallane (piscidinol A and B) and apotirucallane (piscidinol C-E) derivatives has been isolated from the leaves os Walsura piscidia.The fruit yielded a new tetranortriterpenoid, piscidofuran.The structures were assigned on the basis of (1)H NMR and (13)C NMR evidence.
Purushothaman, Kozhiparambil K.,Duraiswamy, Kalyani,Connolly, Joseph D.,Rycroft, David S
Tetranortriterpenoids and Related Compounds. Part 26. Tecleanin, a Possible Precursor of Limonin, and Other New Tetranortriterpenoids from Teclea grandifolia Engl. (Rutaceae)
Tecleanin and 7-deacetylproceranone, two new tetranortriterpenoids from Teclea grandifolia Engl. (Rutaceae), have been assigned structures (2) and (4) respectively.Tecleanin has the same highly oxidised ring A as limonin but a carbocyclic ring D.A third new limonoid was indentified as 7-deacetylazadirone (13).
Ayafor, J. Foyere,Sondengam, B. Lucas,Connolly, Josef D.,Rycroft, David S.,Okogun, Josef I.
p. 1750 - 1753
(2007/10/02)
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