Showing papers on "Flavanone published in 1983"
TL;DR: An investigation of Dodonaea viscosa afforded a new flavonoid having an isoprenoid side chain along with the seven known flavonoids: 5-hydroxy-3,6,
56 citations
TL;DR: Re-examination of the seed extract of Argemone mexicana for the newly reported 5,7,2′,6′-tetrahydroxy-flavone failed to indicate the presence of any novel flavone, highlighting the danger of relying entirely on spectral measurements for identifying new flavonoids.
40 citations
TL;DR: A new flavanone, designated fleminone, was isolated from the petrol extract of the stems of Flemingia macrophylla as discussed by the authors, its structure was established as 5,2′-dihydroxy-4′-methoxy-6-(3-methylbut-2-enyl)-6″,6″-dimethyl-pyrano (2″,3″: 7,8) flavanones.
24 citations
21 citations
TL;DR: A new chromone, named sophorachromone A (I), mp 138-139°C, C19H22O4, and a new flavanone, called sophoraflavanone A(II), mp 144-145°c, C25H28O5, were isolated together with isosophoranone (III) from the root of Sophora tomentosa L. (Leguminosae).
Abstract: A new chromone, named sophorachromone A (I), mp 138-139°C, C19H22O4, and a new flavanone, named sophoraflavanone A (II), mp 144-145°C, C25H28O5, were isolated together with isosophoranone (III) from the root of Sophora tomentosa L. (Leguminosae). The structures of I and II were established to be 8-geranyl-5, 7-dihydroxychromone and 6-geranyl-5, 7, 4'-trihydroxyflavanone, respectively, on the basis of chemical and spectral evidence.
21 citations
TL;DR: The P. vulgaris enzyme showed similarities to the enzyme recently purified from cell cultures of Petroselinum hortense with respect to molecular weight, pH optimum, ability to catalyse 14 CO 2 exchange between NaH 14 CO 3 and malonyl-CoA, and overall response of naringenin formation to varying thiol concentration, but appeared much less stable.
17 citations
TL;DR: Sanggenon B (I) as mentioned in this paper is a variation of a Diels-Alder adduct of a chalcone derivative and a dehydroprenylflavanone derivative.
Abstract: From the benzene extract of the Chinese crude drug "Sāng-Bai-Pi" (Japanese name Sōhakuhi), the root barks of Morus sp. (Moraceae), a novel isoprene substituted flavanone derivative, named Sanggenon B, was isolated; its structure was shown to be I on the basis of spectral and chemical data. Sanggenon B (I) is regarded biogenetically as a variation of a Diels-Alder adduct of a chalcone derivative and a dehydroprenylflavanone derivative.
17 citations
TL;DR: The aerial parts of Helichrysum thapsus afforded three new flavanone derivatives all derived from pinocembrin this paper, and they were used in the development of a new drug.
15 citations
TL;DR: A new prenylated flavanone, oaxacacin, and its chalcone, mixtecacin , have been isolated and their structures elucidated from their chemical properties and spectral data.
13 citations
TL;DR: From the fronds of the fern Ceterach officinarum naringin and a new flavanone, naringenin 7-[ O - L -arabinopyranosyl-(1 → 6) glucoside], have been characterized as discussed by the authors.
11 citations
TL;DR: From the benzene and ethyl acetate soluble fractions of an ethanolic extract of roots of PROSOPIS JULIFLORA two new flavanone glycosides have been isolated and characterised.
Abstract: From the benzene and ethyl acetate soluble fractions of an ethanolic extract of roots of PROSOPIS JULIFLORA two new flavanone glycosides have been isolated and characterised as 3', 4'-dihydroxy 5-methoxy 6-methyl flavanone 7-0-beta-D-glucopyranoside (I) and 7,4'-dimethoxy 6,8-dimethyl flavanone 5-0-beta-D-galactopyranoside (II).
TL;DR: To clarify the structure-taste relationships of flavanone and dihydrochalcone (DHC) glycosides, the new compounds, naringenin 7-O-(2-O-α-d-fucopyranosyl-β-D-galactoside) (I), -7-O-, 2-Oβ-d,fucopeyranosyl- β-d-, d-Galactosides) (II, -7,O-, 1.58, 0.39 and 0.75 times more
Abstract: To clarify the structure-taste relationships of flavanone and dihydrochalcone (DHC) glycosides, the new glycosides, naringenin 7-O-(2-O-α-d-fucopyranosyl-β-d-galactoside) (I), -7-O-(2-O-β-d-fucopyranosyl-β-d-galactoside) (II), -7-O-(2-O-α-l-fucopyranosyl-β-d-galactoside) (III), -7-O-(2-O-α-l-fucopyranosyl-β-d-galactoside) (V), -7-O-(2-O-α-l-rhamnopyranosyl-β-d-mannoside) (VI), -7-O-α-d-galactoside) (XII), hesperetin 7-O-(2-O-β-l-fucopyranosyl-β-d-galactoside) (IV), naringenin DHC 4′-O-(2-O-β-d-fucopyranosyl-β-d-galactoside) (VII), -4′-(2-O-β-d-fucopyranosyl-β-d-galactoside) (VIII), -4′-O-(2-O-β-l-fucopyranosyl-β-d-galactoside) (IX), -4′-O-(2-O-β-l-fucopyranosyl-β-d-galactoside) (XI), -4′-O-β-d-galactoside) (XIII) and hesperetin DHC 4′-O-(2-O-β-l-fucopyranosyl-β-d-galactoside) (X) were synthesized.The flavanones I, IV and XII had no taste but II, III, V and VI respectively tasted 0.05, 0.58, 0.39 and 0.75 times more bitter than naringin. Compounds VII and VIII were tasteless but IX, X, XI and XIII were fou...
TL;DR: From the bark and spines of Alluaudiopsis marnieriana, a novel flavanone has been identified and identified as 5,7,3′-trihydroxy-6,8-di- C -methyl-4′,5′-dimethoxyflavanone by UV, 1 H NMR and mass spectroscopy as mentioned in this paper.