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Xanthone

About: Xanthone is a research topic. Over the lifetime, 1639 publications have been published within this topic receiving 25870 citations. The topic is also known as: 9-oxo-xanthene & Diphenyline ketone oxide.


Papers
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Book ChapterDOI
TL;DR: In this paper, the authors studied the chemical composition of 12 species of Gentianaceae and extracted 17 xanthone glycosides, nine of them were new natural products and one was a new natural product.
Abstract: Most species of Gentianaceae in Qinghai-Tibet Plateau are traditional Tibetan medicines which were used for stabilizing liver functions and improving the gallbladder. They were used for curing hepatitis, cholecystitis and other diseases. We have studied the chemical composition of 12 species of Gentianaceae and extracted 17 xanthone glycosides. Nine of them are new natural products. Pharmacological studies showed that xanthone C-glycosides is beneficial to the gallbladder and that xanthone O-glycosides is the effective component in curing hepatitis.

3 citations

Journal Article
TL;DR: Compound VII is a novel xanthone, named daviditin A, the others were isolated from Swertia davidi Franch.
Abstract: AIM: To study the active constituents of Swertia davidi Franch.. METHODS: Chromatography was used to isolate and purify the chemical components, their structures were identified by spectral analysis. RESULTS: Three compounds were identified as 1,7-dihydroxy-3,8-dimethoxyxanthone (gentiacaulein) (V), 1,8-dihydroxy-3,7-dimethoxyxanthone (methylswertianin) (VI) and 1,8-dihydroxy-3,4,7-trimethoxyxanthone (VII). CONCLUSION: Compound VII is a novel xanthone, named daviditin A, the others were isolated from Swertia davidi Franch. for the first time.

3 citations

Journal ArticleDOI
TL;DR: One prenylated xanthone, ananixanthone as discussed by the authors, was isolated from the bark of Symphonia globulifera and determined by NMR spectroscopy including 2D techniques.
Abstract: One new prenylated xanthone, ananixanthone, was isolated from the bark of Symphonia globulifera The structure was determined by NMR spectroscopy including 2D techniques.

3 citations

Journal Article
TL;DR: In this paper, the chemical constituents from the heartwood of Caesalpinia sappan were identified by column chromatography on silica gel,Sephadex LH-20, and semi-preparative HPLC.
Abstract: Objective To study the chemical constituents from the heartwood of Caesalpinia sappan.Methods The chemical constituents were isolated and purified by column chromatography on silica gel,Sephadex LH-20,and semi-preparative HPLC.The structures of compounds were identified by physicochemical properties,spectral analysis,and co-TLC with reference substances.Results Eleven compounds were isolated from the petroleum ether fraction of 95% ethanol extract and were identified as 1-hydroxy-7-methoxy xanthone(1),2-hydroxyxanthone(2),1,5-dihydroxyxanthone(3),1,7-dihydroxyxanthone(4),chrysophanol(5),friedelin(6),ursolic acid(7),β-sitosterol palmitate(8),ergosta-4,6,8(14),22(23)-tetraen-3-one(9),stigmasterol(10),and β-sitosterol(11).Conclusion Except compounds 10 and 11,others are isolated from this plant for the first time.Compounds 1—5 are firstly isolated from the genus Caesalpinia L.and are also compounds with xanthone and anthraquinone skeletons firstly isolated from the plants of Caesalpinia L.

3 citations

Patent
30 Jul 2014
TL;DR: In this article, a xanthone compound was shown in a formula (I) and a preparation method of the compound was described, where the preparation method comprises the following steps: under a condition of room temperature and air, dissolving o-halogenated alkynone and a 1, 3-dicarbonyl compound in a solvent in the presence of an inorganic base.
Abstract: The invention discloses a xanthone compound shown in a formula (I) and a preparation method of the xanthone compound The preparation method comprises the following steps: under a condition of room temperature and air, dissolving o-halogenated alkynone and a 1, 3-dicarbonyl compound in a solvent in the presence of an inorganic base; heating to 100 DEG C and reacting for 2-8 hours; and separating and purifying to obtain the xanthone compound shown in the formula (I) The xanthone compound disclosed by the invention has the advantage that reaction can be carried out in air without noble metal catalysts and has the advantages of relative low reaction temperature, short reaction time, simple post-treatment, low cost, good universality, environment friendliness and the like

3 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202347
202296
202146
202054
201949
201872