Tetranortriterpenoids related to nimbin and nimbolide from Azadirachta indica A. Juss (Meliaceae)

Publikations-Art
Zeitschriftenbeitrag
Autoren
Bokel, M.; Cramer, R.; Gutzeit, H.; Reeb, S.; Kraus, W.
Erscheinungsjahr
1990
Veröffentlicht in
Tetrahedron
Band/Volume
46/3
Seite (von - bis)
775-82
Abstract

Three new tetranortriterpenoids, 6-deacetylnimbinal (I), nimbinol (II), and 28-deoxonimbolide (III), related to nimbin and nimbolide, have been isolated from A. indica. I and III were found in the leaf exts., and II in the seeds. The assignment of the structures I, II, and III was achieved on the basis of 1H and 13C NMR analyses and chem. transformations. The NMR spectra of nimbanal, 6-deacetylnimbin, nimbin, and nimbolide were partially reassigned.

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