Two isoflavanones from the stem bark of Erythrina sacleuxii

• Published in: Phytochemistry (Oxford) Vol. 55; no. 5; pp. 457 - 459
• Main Authors: Yenesew, Abiy, Midiwo, Jacob O, Heydenreich, Matthias, Schanzenbach, Dirk, Peter, Martin G
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier Ltd 01-11-2000; Elsevier
• Subjects: ( R)-2,3-Dihydro-7-demethylrobustigenin; ( R)-Saclenone; Biological and medical sciences; Chemical constitution; Erythrina sacleuxii; Fundamental and applied biological sciences. Psychology; Isoflavanones; Isoflavones - chemistry; Isoflavones - isolation & purification; Leguminosae; Molecular Structure; Plant physiology and development; Plant Stems - chemistry; Rosales - chemistry; Spectrum Analysis; Stem bark; Kenya; East Africa; Africa; Stem bark; ( R)-Saclenone; Erythrina sacleuxii; Leguminosae; Isoflavanones; ( R)-2,3-Dihydro-7-demethylrobustigenin; Folk medicine; Molecular structure; Dicotyledones; Angiospermae; Bark; Isolation; Spermatophyta; Flavonoid; Stem; Medicinal plant
• ISSN: 0031-9422; 1873-3700
• DOI: 10.1016/S0031-9422(00)00349-6

From the stem bark of
Erythrina sacleuxii two new isoflavanones, (
R)-5,7-dihydroxy-2′,4′,5′-trimethoxyisoflavanone (trivial name, (
R)-2,3-dihydro-7-demethylrobustigenin) and (
R)-5-hydroxy-2′,4′,5′-trimethoxy-2″,2″-dimethylpyrano[5″,6″:6,7]isoflavanone (trivial name, (
R)-saclenone) were isolated. In addition the known compounds shinpterocarpin, 2,3-dehydrokievitone, abyssinone V, abyssinone V-4′-methyl ether, erythrinasinate and 4′-
O-methylsigmoidin B were isolated. The structures were determined on the basis of spectroscopic evidence.