Results 31 to 40 of about 6,787 (215)

A free radical process for oxidation of hydrocarbons promoted by nonmetal xanthone and tetramethylammonium chloride under mild conditions

, 2009
A nonmetal catalytic system consisting of N-hydroxyphthalimide, xanthone, and tetramethylammonium chloride was developed. A wide range of hydrocarbons could be oxidized efficiently with dioxygen under mild conditions.
Sun, Zhiqiang, Xu, Jie, Zhang, Wei, Miao, Hong, Du, Zhongtian, Ma, Hong, 徐杰   +6 more
core   +1 more source

Cytoprotective and Anti-genotoxic Effects of Xanthone Derivatives from Garcinia mangostana Against H2O2 Induced PBMC Cell and Blood Leukocytes Damage of Normal and Type 2 Diabetes Volunteers

Walailak Journal of Science and Technology, 2018
Hyperglycemia is well-known for inducing cellular oxidative damage in type II diabetes (T2D) patients. This research addressed the cytoprotective and anti-genotoxic effect of xanthone derivatives from Garcinia mangostana against hydrogen peroxide (H2O2 ...
Naymul KARIM, Lanchakon CHANUDOM, Jitbanjong TANGPONG   +2 more
doaj   +1 more source

LC-QTOF-MS analysis of xanthone content in different parts of Garcinia mangostana and its influence on cholinesterase inhibition

Journal of Enzyme Inhibition and Medicinal Chemistry, 2020
Mangosteen is one of the best tasting tropical fruit widely cultivated in Southeast Asia. This study aimed to quantify xanthone content in different parts of Garcinia mangostana by LC-QTOF-MS and determine its influence on their cholinesterase inhibitory
Kooi Yeong Khaw, Chun Wie Chong, Vikneswaran Murugaiyah   +2 more
doaj   +1 more source

Cytotoxic Prenylated Xanthones from the Pericarps of Garcinia mangostana

Molecules, 2014
Bioassay-guided fractionation of an ethanol extract of the pericarps of Garcinia mangostana led to the isolation of two new prenylated xanthones, named 1,3,7-trihydroxy-2-(3-methyl-2-butenyl)-8-(3-hydroxy-3-methylbutyl)-xanthone (1) and 1,3,8 ...
Zeng Xu, Lei Huang, Xiao-Hong Chen, Xiao-Feng Zhu, Xiao-Jun Qian, Gong-Kan Feng, Wen-Jian Lan, Hou-Jin Li   +7 more
doaj   +1 more source

Design, Synthesis, and Photophysical Studies of Functionalized Polyaromatic Isonitriles as Visible Light Photoredox Catalysts

European Journal of Organic Chemistry, EarlyView.
A new series of structurally rich polyaromatic isonitriles is presented as photoredox catalysts. Their photophysical properties are investigated by UV–Vis absorption and fluorescence measurements, combined with experimental and theoretical studies to evaluate both ground‐ and excited‐state redox properties.
Cristina Martini, Camilla Russo, Jussara Amato, Carmine Volpe, Francesca Brunelli, Laurence Grimaud, Maxime R. Vitale, Greta Donati, Andrea Basso, Mariateresa Giustiniano   +9 more
wiley   +1 more source

Recent cancer drug development with xanthone structures

, 2009
Objectives Xanthones are simple three-membered ring compounds that are mainly found as secondary metabolites in higher plants and microorganisms. Xanthones have very diverse biological profiles, including antihypertensive, antioxidative,
Younghwa Na
core   +1 more source

Xanthone impairs platelet activation and thrombus formation

Platelets
Xanthone, a naturally occurring oxygenated heterocyclic compound from the Garcinia family with known anti-cancer, antimicrobial, antioxidant, anti-inflammatory, and antiviral properties, has an unclear role in platelet function.
Hui Zhu, Ruoyi Shen, Chenyue Wang, Xiaoyue Zu, Yanlong Zhou, Long Yang, Yueyue Sun, Ping Fu, Jun Lu   +8 more
doaj   +1 more source

Antioxidants and Anticholinesterase Activities of the Characterized Ethanolic of Ripe Sesoot (Garcinia picrorrhiza Miq.) Fruit Extract (GpKar) and Xanthone

Majalah Obat Tradisional, 2017
Oxidative stress has been known to contribute to Alzheimer’s disease. Acetylcholinesterase (AChE) enzyme may lead to Alzheimer’s disease as a neurotransmitter.
Sri Utami, Pratami Adityaningsari, Insan Sosiawan, Susi Endrini, Qomariyah Romadhiyani Sachrowardi, Sonny Pamudji Laksono, Said Nafik, Betharie Cendera Arrahmani, Ervi Afifah, Wahyu Widowati   +9 more
doaj   +1 more source

Gasdermin‐Mediated Pyroptosis: Novel Strategies Against Colorectal Cancer

Cancer Science, EarlyView.
Pyroptosis is a double‐edged sword in colorectal cancer (CRC): chronic low‐grade pyroptosis promotes tumor progression, whereas acute induction of pyroptosis in cancer cells triggers antitumor immunity and enhances therapeutic response. Targeting gasdermin‐mediated pyroptosis represents a promising strategy for CRC treatment.
Kaibo Guo, Yuqian Feng, Jiamin Lu, Nuerbiye Abudurexiti, Xinlei Zhou, Mengfan Wei, Song Zheng   +6 more
wiley   +1 more source

Hydrogen Atom Transfer Induces Photodegradation in Carbonyl‐Based Multi‐Resonance TADF Emitters

Angewandte Chemie, Volume 138, Issue 19, 4 May 2026.
Boosting triplet harvesting in N/C═O MR‐TADF emitters unexpectedly induces rapid photodegradation under oxygen‐free conditions. Spectroscopic studies reveal that triplet excited states trigger hydrogen‐atom transfer from solvent to the carbonyl unit, driven by triplet energetics and hydrogen electrophilicity.
Changfeng Si, Elvie F. P. Beaumont, Jenn Zi Yu Tan, Mitchell J. Demchuk, Zachary M. Hudson   +4 more
wiley   +2 more sources