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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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Journal ArticleDOI
TL;DR: In this article, a new method for the synthesis of 2,2-dimethylchromanones is described in which β-hydroxyisovaleric acid is condensed with a phenol in presence of boron fluoride-etherate.

17 citations

Journal ArticleDOI
TL;DR: The wood of Tovomita macrophylla (Pl. et al. as discussed by the authors ) contains β-amyrin, sitosterol, betulinic acid and two novel compounds for which the structures of 1,3,6-trihydroxy-2,5-diprenyl-6′,6′-dimethylpyrano(2′,3′:7,8)xanthone (tovophyllin-A) and 3,6,dihydroxy-5-prenyl (2.3,

17 citations

01 Jan 2013
TL;DR: In this article, a new xanthone, gracixanthone (1) and the known zeyloxanthanone (2) and trapezifolixanthones (3) together with three common sterols, namely stigmasterol, friedelin and lupeol were elucidated and established by spectroscopic analysis and compared with the spectral data from literature.
Abstract: Extraction and chromatographic isolation of the hexane, chloroform and methanol extracts of stem bark of Calophyllum gracilipes has led to the isolation of a new xanthone, gracixanthone (1) and the known zeyloxanthanone (2) and trapezifolixanthone (3) together with three common sterols, namely stigmasterol, friedelin and lupeol. The structures of the compounds were elucidated and established by spectroscopic analysis and compared with the spectral data from literature. The cytotoxicity of the compounds was evaluated and zeyloxanthanone (2) exhibited strong activity towards

17 citations

Patent
18 Dec 1973
TL;DR: In this article, substituted xanthone carboxylic acid compounds were used for the treatment of the symptons of the asthmatic condition resulting from an antigen-antibody reaction.
Abstract: Methods employing as the essential ingredient, novel substituted xanthone carboxylic acid compounds in the treatment of the symptons of the asthmatic condition resulting from an antigen-antibody reaction. Methods for preparing these compounds and compositions and intermediates therein are also disclosed - 7 - (methylthio) - xanthone - 2 - carbonylic acid is illustrated as representative of the class.

17 citations


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