Results 11 to 20 of about 4,599 (180)

Chlorine-Free Depolymerization of Commercial PMMA via Oxygen-Centered Radicals. [PDF]

Angew Chem Int Ed Engl
A new chlorine‐free photothermal method enables sustainable recycling of plastics with C–C backbones under mild conditions. Driven by an oxygen‐centered radical pathway with ppm levels of anthraquinone catalyst, it eliminates hazardous chlorinated solvents, achieving an impressive 97% depolymerization conversion.
Lin CY, Andreou S, De Alwis Watuthanthrige N, Wang HS, Antonopoulou MN, Anastasaki A.   +5 more
europepmc   +3 more sources

Bioactive Marine Xanthones: A Review [PDF]

Marine Drugs, 2022
The marine environment is an important source of specialized metabolites with valuable biological activities. Xanthones are a relevant chemical class of specialized metabolites found in this environment due to their structural variety and their biological activities. In this work, a comprehensive literature review of marine xanthones reported up to now
José X. Soares, Daniela R. P. Loureiro, Ana Laura Dias, Salete Reis, Madalena M. M. Pinto, Carlos M. M. Afonso   +5 more
openaire   +3 more sources

Xanthones from aerial parts of Juss

Natural Product Communications, 2013
From the aerial parts of Hypericum laricifolium Juss., twelve compounds were isolated and identified. They were the xanthones: 1-hydroxy-7-methoxy-xanthone ( 1 ), 1,7-dihydroxy-xanthone ( 2 ), 2-hydroxy-xanthone ( 3 ), 6-deoxyisojacareubin ( 4 ), 1,3 ...
Irama Ramírez-González, Juan Manuel Amaro-Luis, Alí Bahsas   +2 more
doaj   +1 more source

Characterization of Antioxidant and α-Glucosidase Inhibitory Compounds of Cratoxylum formosum ssp. pruniflorum and Optimization of Extraction Condition

Antioxidants, 2023
Cratoxylum formosum ssp. pruniflorum (Kurz.) Gogel (Guttiferae), called kuding tea, is widely distributed in Southeast Asia. In this study, the constituents and biological activity of C. formosum ssp. pruniflorum were investigated. Extract of its leaves,
Heewon An, Le Nguyen Thanh, Le Quoc Khanh, Se Hwan Ryu, Solip Lee, Sang Won Yeon, Hak Hyun Lee, Ayman Turk, Ki Yong Lee, Bang Yeon Hwang, Mi Kyeong Lee   +10 more
doaj   +1 more source

Xanthones with Antiproliferative Effects on Prostate Cancer Cells from the Stem Bark of

Natural Product Communications, 2012
Investigations of the constituents of the stem barks of Garcinia xanthochymus have yielded two new compounds, garcinenones X (1) and Y (2), along with five known xanthones, 1,4,5,6-tetrahydroxy-7-(3-methylbut-2-enyl)xanthone (3), 1,4,6-trihydroxy-5 ...
Feng Ji, Zhanlin Li, Gaofeng Liu, Shengli Niu, Nan Zhao, Xiaoqiu Liu, Huiming Hua   +6 more
doaj   +1 more source

Chemical Constituents From the Bark of

Natural Product Communications, 2020
The phytochemical investigation of the methanol extract of bark of Garcinia oblongifolia yielded a new xanthone derivative 1,3,8-trihydroxy-6’,6’-dimethylpyrano (2’,3’:5,6) xanthone ( 5 ) along with 8 known compounds, including 1,2,5-trihydroxy-6 ...
Yutong Han, Xingyu Li, Chaonan Yuan, Ronghui Gu, Edward J. Kennelly, Chunlin Long   +5 more
doaj   +1 more source

Cytotoxic Xanthones from the Leaves of

Natural Product Communications, 2007
Two new xanthones, 7-hydroxydesoxymorellin ( 1 ) and isocaledonixanthone D ( 2 ), and four known ones, gaudichaudione H, 1,7-dihydroxy-3-methoxy-2-(3-methyl-2-butenyl)xanthone, 1,5-dihydroxy-3-methoxy-2-(3-methyl-2-butenyl)xanthone, and 1,3,7-trihydroxy ...
Rozida Mohd Khalid, Md. Lip Jabit, Faridah Abas, Johnson Stanslas, Khozirah Shaari, Nordin H. Lajis   +5 more
doaj   +1 more source

Chemometrically Assisted Optimization of Pregabalin Fluorescent Derivatization Reaction with a Novel Xanthone Analogue and Validation of the Method for the Determination of Pregabalin in Bulk via a Plate Reader

Molecules, 2022
Quantitation of chromophore-free analytes is always a challenge. To this purpose, derivatization of the analyte constitutes a common strategy, leading to a product with a strong signal. In the current study, a novel xanthone analogue was utilized for the
Nikolaos Kritikos, Aikaterini Iliou, Amalia D. Kalampaliki, Evangelos Gikas, Ioannis K. Kostakis, Benoît Y. Michel, Yannis Dotsikas   +6 more
doaj   +1 more source

Synthesis, Biological Evaluation, and In Silico Studies of Novel Aminated Xanthones as Potential p53-Activating Agents

Molecules, 2019
Xanthone scaffold has been regarded as an attractive chemical tool in the search for bioactive molecules with antitumor activity, and in particular two xanthone derivatives, 12-hydroxy-2,2-dimethyl-3,4-dihydro-2H,6H-pyrano [3,2-b]xanthen-6-one (4) and 3 ...
Agostinho Lemos, Ana Sara Gomes, Joana B. Loureiro, Pedro Brandão, Andreia Palmeira, Madalena M. M. Pinto, Lucília Saraiva, Maria Emília Sousa   +7 more
doaj   +1 more source

Antiprotozoal and Antibacterial Activity of Ravenelin, a Xanthone Isolated from the Endophytic Fungus Exserohilum rostratum

Molecules, 2021
The natural compound ravenelin was isolated from the biomass extracts of Exserohilum rostratum fungus, and its antimicrobial, antiplasmodial, and trypanocidal activities were evaluated.
Jeferson Rodrigo Souza Pina, João Victor Silva-Silva, Josiwander Miranda Carvalho, Heriberto Rodrigues Bitencourt, Luciano Almeida Watanabe, Juan Matheus Pereira Fernandes, Guilherme Eduardo de Souza, Anna Caroline Campos Aguiar, Rafael Victorio Carvalho Guido, Fernando Almeida-Souza, Kátia da Silva Calabrese, Patrícia Santana Barbosa Marinho, Andrey Moacir do Rosario Marinho   +12 more
doaj   +1 more source