Results 61 to 70 of about 49,221 (207)
Mechanism and Application of Baker–Venkataraman O→C Acyl Migration Reactions [PDF]
, 2014 This literature review focuses on the O→C acyl migration of aryl esters to yield the corresponding 1,3-dicarbonyl products—a reaction known as the Baker–Venkataraman rearrangement—and outlines their subsequent transformations.
Ameen, Dana, Snape, Timothy James
core +1 more source
Advances in organic UV filters for sunscreens over the past decade
Photochemistry and Photobiology, EarlyView.Highlighted organic UV filter frameworks that have been described for sunscreens over the past decade divided into three groups: derivatives of or inspired by approved organic UV filters, natural product‐based compounds, and miscellaneous. Abstract Ultraviolet (UV) radiation is a major environmental factor in photoaging, erythema, and skin cancer ...
Gabriela Zanella Marcon +4 more
wiley +1 more source
Marine Drugs, 2016 Two new diphenylketones (1 and 2), a new xanthone (3), and a known xanthone analogue (4) were isolated and identified from Talaromyces islandicus EN-501, an endophytic fungus obtained from the fresh collected marine red alga Laurencia okamurai.
Hong-Lei Li +4 more
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Food Frontiers, Volume 7, Issue 3, May 2026.Garcinone C (Gar. C), a xanthone derived from mangosteen (Garcinia mangostana), suppresses triple‐negative breast cancer growth and stemness by inducing mitochondrial‐mediated apoptosis and inhibiting the Wnt/β‐catenin pathway, highlighting its potential as a natural compound for the prevention and treatment TNBC.
Danhong Zheng +4 more
wiley +1 more source
Etudes des xanthones dans les feuilles de Gentiana bavarica L. : Communication préliminaire
CHIMIA, 1973 Ten xanthones have been isolated from the leaves of Gentiana bavarica L. by means of thin layer and column chromatography. The xanthones VI to X are new heterosides ; the determination of their structures will be described in a later paper.
Kurt Hostettmann +2 more
doaj +1 more source
Xanthones from Calophyllum inophyllum [PDF]
, 2009 The roots of Calophyllum inophyllum (Guttiferae), furnished six xanthones which are rasilixanthone (1), 1,3,5-trihydroxy-2- methoxy xanthone (2), caloxanthone A (3), pyranojacareubin (4), caloxanthone B (5) and tovopyrifolin (6), Structural elucidations ...
Ee, Gwendoline Cheng Lian +4 more
core
Xanthones from Polygala alpestris (Rchb.)
Zeitschrift für Naturforschung C, 2004 Bioactivity-guided fractionation of Polygala alpestris L. (Rchb.) extracts led to the identification of two new xanthones, 1,3,7-trihydroxy-2,6-dimethoxyxanthone (1) and 2,3-methylenedioxy-4,7-dihydroxyxanthone (2). In addition five known compounds 3,4-dimethoxy-1,7-dihydroxyxanthone (3), 1,3-dihydroxy-7-methoxyxanthone (4), 1,7-dihydroxy-2,3 ...
Dall'Acquaa, Stefano +3 more
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Antitumor Activity of Some Prenylated Xanthones [PDF]
Pharmaceuticals, 2009 Pyranoxanthones 6-8 were obtained by dehydrogenation of the respective dihydropyranoxanthones 3-5 with DDQ in dry dioxane. Two prenylated xanthones 10,11 were obtained from the reaction of 1-hydroxyxanthone (9) with prenyl bromide in alkaline medium, or by condensation of xanthone 9 with isoprene in the presence of orthophosphoric acid.
Raquel A.P. Castanheiro +4 more
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Scientific ReportsFridericia formosa (Bureau) L.G. Lohmann (Bignonaceae) is a neotropical liana species found in the Cerrado biome in Brazil. It has been of great interest to the scientific community due to its potential as a source of new antivirals, including xanthones ...
Luana Beatriz Araújo Vaz +6 more
doaj +1 more source
BMC Complementary and Alternative Medicine, 2012 Background Xanthones are a group of oxygen-containing heterocyclic compounds with remarkable pharmacological effects such as anti-cancer, antioxidant, anti-inflammatory, and antimicrobial activities. Methods A xanthones extract (81% α-mangostin and 16% γ-
Aisha Abdalrahim F A +3 more
doaj +1 more source