Synthesis of Chalcones, Flavanones Isolated fromPopowia caulifloraand Their Analogues
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چکیده
منابع مشابه
Chalcones, coumarins, and flavanones from the exudate of Angelica keiskei and their chemopreventive effects.
From an ethyl acetate-soluble fraction of the exudate obtained from the stems of Angelica keiskei (Umbelliferae), 17 compounds, viz. five chalcones (1-5), seven coumarins (6-12), three flavanones (13-15), one diacetylene (16), and one 5-alkylresorcinol (17), were isolated. These compounds were evaluated with respect to their inhibitory effects on the induction of Epstein-Barr virus early antige...
متن کاملSynthesis, characterization and evaluation of antioxidant activities of some novel chalcones analogues
BACKGROUND Chalcone, an important intermediate of flavonoid synthetic pathway, has been shown to exhibit diverse biological and pharmacological activities such as anti- cancer, antioxidant, anti-inflammatory, etc. RESULTS In this study, a novel series of chalcones fatty acid esters 5b-e and 6b-e have been synthesized via the reaction of the respective chalcones with either palmitic or stearic...
متن کاملInfrared Spectra of Substituted Chalcones and Some of Their Ferrocene Analogues
The infrared spectra of substituted chalcones and some of their ferrocene analogues were measured in the region of fundamental and first overtone C = 0 stretching bands. The formation of hydrogen bonds between the substituted chalcones and phenol was examined in the O—H stretching region. The frequencies of fundamental and first overtone C = 0 stretching bands for s-cis and s-trans conformers a...
متن کاملCytotoxic chalcones and flavanones from the tree bark of Cryptocarya costata.
A new flavanone, 7-hydroxy-5,6-dimethoxyflavanone (1), together with three other flavonoids, didymocarpin (2), 2',4'-dihydroxy-5',6'-dimethoxychalcone (3), and isodidymocarpin (4), had been isolated from the methanol extract of the tree bark of Cryptocarya costata. The structures of these compounds were determined based on spectral evidence, including UV, IR, 1-D and 2-D NMR, and mass spectra. ...
متن کاملHPLC of flavanones and chalcones in different species and clones of Salix.
The SPE-HPLC method was developed to determine an isosalipurposide (5) and its derivative, 6"-O-p-coumaroyl ester (6) in the bark of eight taxa (I-VIII) belonging to three species of the genus Salix and originating from a natural habitat or cultivated for pharmaceutical purposes. The chalcones were separated by HPLC under gradient elution with the concentration of ACN increasing from 20% to 50%...
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ژورنال
عنوان ژورنال: Agricultural and Biological Chemistry
سال: 1981
ISSN: 0002-1369
DOI: 10.1080/00021369.1981.10864550