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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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Journal ArticleDOI
TL;DR: An improved method of the synthesis of flavanones catalyzed by pyrrolidine and BF(3) ·Et(2) O has been developed and a lot of Flavanones could be easily synthesized via this method.

18 citations

Journal ArticleDOI
TL;DR: In this paper, a high-performance liquid chromatographic procedure for the analysis of the different flavonoids found in Citrus aurantium tissue extracts has been developed, employing a C18 reverse phase column and an elution isocratic-gradient system with a mixture of water, methanol, acetonitrile and acetic acid.
Abstract: A high-performance liquid chromatographic procedure for the analysis of the different flavonoids found in Citrus aurantium tissue extracts has been developed. It employs a C18 reverse phase column and an elution isocratic-gradient system with a mixture of water, methanol, acetonitrile and acetic acid. We make an exhaustive description of the optimisation process by studying the quantitative chromatographic parameters: k1, w, a, N, HETP and R. The use of different extraction solvents for flavonoids in Citrus aurantium tissues was also studied, DMSO presenting the best results. Twelve compounds were detected, isolated and their spectral structures characterized.

18 citations

Journal ArticleDOI
01 Oct 1949
TL;DR: Iodine is a convenient reagent for the conversion of hydroxy flavanones into flavones as discussed by the authors, which is also suitable for glycosides; examples chosen are naringin, its monomethyl ether and hesperidin.
Abstract: Iodine, in the presence of hot alcoholic sodium acetate, is shown to be a convenient reagent for the conversion of hydroxy flavanones into flavones. Naringenin, its 4′ and 4′: 7-dimethyl ethers, hesperetin and its dimethyl ether are thus oxidised smoothly into apigenin and its ethers and diosmetin respectively. The method is also suitable for glycosides; examples chosen are naringin, its monomethyl ether and hesperidin. The constitution of apiin is discussed and confirmed by correlation with that of naringin. The method works smoothly in all cases where a free hydroxyl is present in the 5-position. In its absence a mixture is formed; by working in the cold the flavones can be obtained, whereas in the hot benzalcoumaranones could be isolated. In such cases the suitability of the phosphorus pentachloride method has been tested using 7-methoxy flavanone. The reaction is considered to involve (1) iodination of the 3-position and (2) elimination of hydriodic acid and these are brought about smoothly with the help of the active and unstable acetate ions. If the second stage involves iodinated flavanone, flavone is obtained; on the other hand if the corresponding iodinated chalkone is present, benzal-coumaranone results.

18 citations

Journal ArticleDOI
TL;DR: Four coumaronochromones, formosanatins A-D (-4), and a flavanone, euchrenone a(16), along with four known compounds, including euchretins E and G, and euchrestaflavanone A, and daidzein, were isolated from the roots of Euchresta formosana.

18 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202355
2022145
202165
202049
201944
201848