Showing papers on "Flavanone published in 1986"
TL;DR: In this article, the aerial parts of nine Baccharis species from Argentina gave 37 new compounds, seven ent -clerodanes, 13 ent -labdanes, two friedolabdane, a norlabdane ketone, seven coumaric acid derivatives, two umbelliferone derivatives, a flavanone, three sesquiterpenes including a nor-furanocadinene and a propiophenone derivative.
77 citations
TL;DR: Grapefruit (Citrus paradisi) cells in suspension cultures did not accumulate flavanone glycosides but were able to specifically O-glucosylate exogenous naringenin and hesperitin at position 7.
70 citations
TL;DR: Identification of chemical compounds responsible for the oviposition behavior in a Rutaceae feeder was undertaken with the epicarp of sour orange which exhibited potent stimulatory activity as did its leaves for egg-laying by the females.
Abstract: Identification of chemical compounds responsible for the oviposition behavior in a Rutaceae feeder,Papilio protenor demetrius, was undertaken with the epicarp of sour orange (Citrus natsudaidai) which exhibited potent stimulatory activity as did its leaves for egg-laying by the females. The stimulants were present in the hydrosoluble fraction, and the kairomonal activity displayed by the peel was regarded as originating from the synergistic effect of the total chemical complex. One of the active compounds was identified as a flavanone glycoside, naringin (naringenin-7β-neohesperidoside), which, although showing no appreciable effectiveness when bioassayed alone, elicited positive response at the concentration of 0.2% either when admixed with other unidentified components or provided the females had been conditioned with them in advance. Another flavanone glycoside, hesperidin (hesperetin-7β-rutinoside) that was contained in a trace amount in the peel also had a positive effect comparable to that of naringin under similar conditions, while their corresponding aglycones were less active or inactive. In contrast, a flavone glycoside, rhoifolin, coexisting in the peel, and some other flavones and flavonols tested as possible candidates for oviposition stimulants were all found entirely ineffective.
61 citations
TL;DR: Diffusates from the fungus-inoculated leaflets of Shuteria vestita have yielded four novel 3-hydroxyflavanone (dihydroflavonol) phytoalexins, one of which is considered to be the 2S,3R stereoisomer of shuterone A.
Abstract: Diffusates from the fungus-inoculated leaflets of Shuteria vestita have yielded four novel 3-hydroxyflavanone (dihydroflavonol) phytoalexins. From spectroscopic and chemical evidence, three of these phytoalexins have been identified as (2R,3R,2''R)--3,5,4'-trihydroxy-2'-isopropenyldihydrofurano (4'',5''; 6,7) flavanone (shuterol,1), (2R,3R)--3,5,7,4'-tetrahydroxy-6-(3,3-dimethylally) flavanone (shuterin, 2), and (2R,3R,2''R)--3,5,2',4'-tetrahydroxy-2''-isopropenyldihydrofurano (4'',5''; 6,7)flavanone (shuterone A, 3). The fourth compound (shuterone B, 4) is considered to be the 2S,3R stereoisomer of shuterone A.
27 citations
TL;DR: Candidone, ovalichalcone and dehydrorotenone have been isolated and identified from the stems and leaves of Tephrosia candida.
21 citations
TL;DR: Chromatographic separation of the acetone extract of Lannea acida leaves resulted in the separation of a new flavanone, 6,7,2,2-dimethylchromeno-8γ,γdimethylallyl flavanones.
19 citations
18 citations
16 citations
TL;DR: Eleven flavonoids, nine aglycones and two glycosides were isolated from Eriodictyon tomentosum, E. angustifolium and E. Californicum, including the flavanone homoeriodictyol.
13 citations
TL;DR: Falcifomin, a new flavanone with a 3-hydroxy-3-methyl-but-1-enyl side chain has been isolated from the pods of Tephrosia falciformis as discussed by the authors.
11 citations
TL;DR: In this article, the roots of Piscidia erythrina were identified and isolated from the roots and identified as the source of 5.8-Prenylpinocembrin and 5.7,4′-trihydroxy-3′,5′-di-(Δ 2 -isopentenyl) isoflavone.
TL;DR: From the seeds of Tephrosia fulvinervis, a new flavone was identified and its structure was elucidated from chemical properties and spectral data in this article, along with the known flavanone fulvinovervin A.
TL;DR: In this article, 10 flavonoids have been isolated from a dichloromethane leafwash of Perityle vaseyi and trace amounts of 7,4′-dimethylnaringenin were observed along with nine O-methylated flavonols.
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