Results 51 to 60 of about 44,706 (210)

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 ...
Rahmani, Mawardi, Kua, Audrey Siew May, Ee, Gwendoline Cheng Lian, Md. Sukari, Mohd Aspollah, Jong, Vivien Yi Mian   +4 more
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Aryl and Alkyl Radiotrifluoromethylation via Metallaphotoredox‐Mediated Radical Cross‐Coupling

Angewandte Chemie, Volume 138, Issue 16, 13 April 2026.
The metallaphotoredox‐mediated radiotrifluoromethylation of arenes and alkanes is described. The operationally simple protocols make use of substrates bearing thianthrenium salts (TT) or N‐hydroxyphthalimide (NHPI) esters and CF218FI. The reaction proceeds through a Ru‐mediated radical formation followed by a Cu‐mediated radical cross‐coupling step and
Lukas Veth, Albert D. Windhorst, Danielle J. Vugts   +2 more
wiley   +2 more sources

In Vitro and In Vivo Antiangiogenic Activity of Caged Polyprenylated Xanthones Isolated from Garcinia hanburyi Hook. f.

Molecules, 2013
Eleven known caged polyprenylated xanthones 1–11 were isolated from the resin of Garcinia hanburyi Hook. f., and their structures were identified by their MS, NMR and UV spectra.
Jianhong Yang, Shichao He, Shucai Li, Ronghong Zhang, Aihua Peng, Lijuan Chen   +5 more
doaj   +1 more source

Light‐Driven [2 + 2] Cycloaddition Strategies for the Synthesis of Cyclobuta[b]indoles and Their Derivatives

ChemPhotoChem, Volume 10, Issue 6, June 2026.
This review surveys the literature on light‐driven dearomative [2+2] cycloadditions of indoles, highlighting their power to access complex cyclobuta[b]indole frameworks. Advances in photocatalysis, sensitizer design, and reaction engineering enable selective and sustainable assembly of strained three‐dimensional architectures, expanding opportunities ...
Maria Chiara Cabua, Davide Moi, Alberto Luridiana, Francesco Secci, Emanuele Cocco   +4 more
wiley   +1 more source

Two New Diphenylketones and a New Xanthone from Talaromyces islandicus EN-501, an Endophytic Fungus Derived from the Marine Red Alga Laurencia okamurai

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, Xiao-Ming Li, Hui Liu, Ling-Hong Meng, Bin-Gui Wang   +4 more
doaj   +1 more source

Efficacy, Stability, and Safety Evaluation of New Polyphenolic Xanthones Towards Identification of Bioactive Compounds to Fight Skin Photoaging

Molecules, 2020
Antioxidants have long been used in the cosmetic industry to prevent skin photoaging, which is mediated by oxidative stress, making the search for new antioxidant compounds highly desirable in this field.
Diana I. S. P. Resende, Mariana C. Almeida, Bruna Maciel, Helena Carmo, José Sousa Lobo, Carlotta Dal Pozzo, Sara M. Cravo, Gonçalo P. Rosa, Aida Kane-Pagès, Maria do Carmo Barreto, Isabel F Almeida, Maria Emília de Sousa, Madalena M. M. Pinto   +12 more
doaj   +1 more source

Corn Starch‐Pink Peppercorn Composite Biofilms as Potential Biodegradable Food Packaging

Starch - Stärke, Volume 78, Issue 6, June 2026.
Biodegradable packaging produced with renewable raw materials is important to sustainability. In this sense, starch‐based biofilms modified with different forms of pink peppercorn could be useful as potential biocompatible, biodegradable materials for food protection, understanding the physiochemical interactions between biofilm and fruit during the ...
Julimara Dacas Gonçalves Flores, Luiz Jardel Visioli, Heveline Enzweiler, Alexandre Tadeu Paulino   +3 more
wiley   +1 more source

From natural xanthones to synthetic C-1 aminated 3,4-dioxygenated xanthones as optimized antifouling agents

, 2022
Biofouling, which occurs when certain marine species attach and accumulate in artificial submerged structures, represents a serious economic and environmental issue worldwide. The discovery of new non-toxic and eco-friendly antifouling systems to control
Agostinho Lemos (9216728), Marta Correia-da-Silva (2177044), Emilia Sousa (15404789), Sandra Pereira (10185344), Vitor Vasconcelos (108651), Jeffrey Plowman (15402200), Stefan Clerens (485115), Madalena Pinto (2200642), Joana Almeida (318833), Ancy Thomas (8089715), Diana Resende (2193472), Alexandre Campos (4669546)   +11 more
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Estudo das propriedades químicas, estruturais e biológicas das espécies Polygala paniculata e Polygala pulchella [PDF]

, 2008
Tese (doutorado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas. Programa de Pós-Graduação em Química.As espécies Polygala paniculata e Polygala pulchella são usadas na medicina popular para o controle e tratamento de ...
Missau, Fabiana Cristina
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Generation of a Ground‐State Electron Donor Utilizing Stored Light Energy

Chemistry – A European Journal, Volume 32, Issue 17, 5 May 2026.
Chemically stored light energy enables the generation of dianion reductants (∼−2.7 V) from vicinal diols derived from diaryl ketone photodimerization. These ground‐state electron donors efficiently reduce challenging substrates at room temperature, including aryl bromides, alkyl iodides, and sulfonamides.
Marc Taillefer, Éric Clot, Alexis Prieto   +2 more
wiley   +1 more source