Absolute configuration, conformation, and chiral properties of flavanone-(3→8″)-flavone biflavonoids from Rheedia acuminata
作者:Xing-Cong Li、Alpana S Joshi、Bo Tan、Hala N ElSohly、Larry A Walker、Jordan K Zjawiony、Daneel Ferreira
DOI:10.1016/s0040-4020(02)01096-7
日期:2002.10
The absoluteconfigurations of three flavanone-(3→8″)-flavone type biflavonoids, (+)-morelloflavone (1), (+)-morelloflavone-7-sulfate (2) and (+)-volkensiflavone-7-sulfate (3) isolated from Rheedia acuminata were confirmed by circular dichroism as 2R,3S, hence clarifying the literature confusion of 2S,3R absoluteconfiguration for (+)-morelloflavone. The conformations of this class of biflavonoids