Leaf glands of Ceanothus species excrete a lipophilic material that contains a variety of flavonoids. Most of these are aglycones, but some glycosides were also observed. Seven out of eight species exhibit flavonols, whereas flavones are excreted by only one species. Four species produce flavanones and dihydroflavonols; one excretes a remarkable quantity of flavonol glycosides. The exudate flav...

A new C(2)-symmetric chiral bis-sulfoxide ligand, (R,R)-1,2-bis(tert-butylsulfinyl)benzene, has been designed and prepared by the reaction of (R)-benzyl tert-butylsulfoxide with (R)-thiosulfinate. This ligand exhibits excellent enantioselectivities in the Rh-catalyzed asymmetric 1,4-addition reaction. In particular, the present work has realized access to optically pure flavanones for the first...

Trypanosomiasis and leishmaniasis are a group of neglected parasitic diseases caused by several species parasites belonging to the family Trypansomatida. The present study investigated antitrypanosomal antileishmanial activity chalcones flavanones from Polygonum salicifolium, which grows in wetlands Iraq. phytochemical evaluation plant yielded two chalcones, 2′,4′-dimethoxy-6′-hydroxychalcone 2...

Two new phenolic glycosides, 1-O-benzyl-[5-O-benzoyl-beta-D-apiofuranosyl (1-->2)]-beta-D-glucopyranoside (1), and 4;-hydroxy-7,3;-dimethoxyflavan-5-O- beta-D-gluco-pyranoside (2), together with nine known flavanones 3 - 11, have been isolated from the dried whole plants of Viscum articulatum.Their structures were identified by extensive spectral analysis, especially 2D NMR techniques. Compound...

Bud exudates o f Populus simonii and Populus yunna­ nensis were similar and contained primarily caffeic acid and its esters together with the flavanones pinocembrin and pinobanksin-3-acetate. The terpenoid patterns o f the specimens examined varied, but this variation was not species related. On the basis o f bud exudate analysis P. simonii and P. yunnanensis may be considered to represent a si...