Topic
Flavanone
About: Flavanone is a research topic. Over the lifetime, 1965 publications have been published within this topic receiving 54729 citations. The topic is also known as: flavanones.
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TL;DR: The catalytic Baeyer-Villiger rearrangement of flavanones is described by the use of the homogeneous methyltrioxorhenium (MTO)/H2O2 system.
44 citations
TL;DR: Hispidone, a new flavanone, has been isolated from Onosma hispida and assigned the structure (2S)-5,2'-dihydroxy-7,4',5'-trimethoxyflavanone by spectroscopic methods.
Abstract: Hispidone, a new flavanone, has been isolated from Onosma hispida and assigned the structure (2S)-5,2'-dihydroxy-7,4',5'-trimethoxyflavanone (1) by spectroscopic methods. In addition, (2S)-5,2'-dihydroxy-7,5'-dimethoxyflavanone (2), benzoic acid (3), and 4-hydroxy benzoic acid (4) are also reported for the first time from this species.
44 citations
TL;DR: One new flavanone, 4′-hydroxyisorottlerin (2), and two new chalcone derivatives, kamalachalcones C (3) and D (4), were isolated from Mallotus philippensis (kamala tree) as mentioned in this paper.
Abstract: One new flavanone, 4′-hydroxyisorottlerin (2), and two new chalcone derivatives, kamalachalcones C (3) and D (4), were isolated from Mallotus philippensis (kamala tree). The largest compound (4; Mr 1098 g/mol) was shown to possess a unique, fused-ring system made of two hydroxy-chalcone units, giving rise to eight fused benzene/pyran units. From the same plant, the following six known compounds were also isolated: kamalachalcone A (5) and B (6), isoallorottlerin (7), isorottlerin (8), 5,7-dihydroxy-8-methyl-6-prenylflavanone (9); 6,6-dimethylpyrano(2″,3″: 7,6)-5-hydroxy-8-methylflavanone (10), and rottlerin (1). The structures of the new compounds were confirmed by in-depth spectral analyses, including 2D-NMR techniques, and the full 13C-NMR assignments of the known flavanones 1 and 7–10 are published for the first time.
44 citations
TL;DR: A new endoperoxysesquiterpene lactone, 10α-hydroxy-1α,4α-endoperoxy-guaia-2-en-12,6α-olide (1 ), together with a flavanone, eriodictyol (2 ), and two flavone glycosides, acacetin-7- O -β- d -glucopyranoside (3 ) and acacetIN-7 O -α- l -rhamopyranoide (4 ), were isolated from the
44 citations
Abstract: In some European countries there is a legal barrier against the marketing of some citrus juice mixtures under the denomination “orange juice”, as allowed under certain conditions by the FDA for pasteurized and canned orange juice and for frozen concentrated orange juice. For this reason methods have to be developed to determine a juice addition of up to 10% Citrus reticulata and hybrids thereof and up to 5% Citrus aurantium. Using HPLC equipped with a photodiode array (PDA) detector we could establish that a combination of the flavanone glycoside (FG) and polymethoxylated flavone (PMF) pattern offers possibilities. For the flavanone glycosides the method is based on the presence of some specific compounds, on the didymin content, on a divergent ratio of hesperidin on narirutin, and/or on an unidentified component. In other cases, however, an F test applied on the relative PMF pattern offers a better solution calculating the % adulteration probability. We could conclude that, for all examined citrus sample...
44 citations