Results 1 to 10 of about 3,127 (182)

Comparative Hepatoprotective Effects of Esculetin and Its Derivatives Against Oxidative Stress [PDF]

Antioxidants
In this study, we evaluated the antioxidant activities of esculetin and four synthesized derivatives (E1, 2-oxo-2H-1-benzopyran-6,7-diyl diacetate; E2, 7-hydroxy-2-oxo-2H-1-benzopyran-6-yl acetate; E3, 7-(methoxymethoxy)-2-oxo-2H-1-benzopyran-6-yl ...
Yoonjeong Kim, Jihyun Kwon, Jae-Hwan Kwak, In-hwan Baek, Younghwa Kim   +4 more
doaj   +2 more sources

(6E,10E) Isopolycerasoidol and (6E,10E) Isopolycerasoidol Methyl Ester, Prenylated Benzopyran Derivatives from Pseuduvaria monticola Induce Mitochondrial-Mediated Apoptosis in Human Breast Adenocarcinoma Cells. [PDF]

PLoS ONE, 2015
Phytochemicals from Pseuduvaria species have been reported to display a wide range of biological activities. In the present study, a known benzopyran derivative, (6E,10E) isopolycerasoidol (1), and a new benzopyran derivative, (6E,10E) isopolycerasoidol ...
Hairin Taha, Chung Yeng Looi, Aditya Arya, Won Fen Wong, Lee Fah Yap, Mohadeseh Hasanpourghadi, Mustafa A Mohd, Ian C Paterson, Hapipah Mohd Ali   +8 more
doaj   +2 more sources

Structural and Biological Studies of Bioactive Silver(I) Complexes with Coumarin Acid Derivatives [PDF]

Molecules
Two new Ag(I) complexes with coumaric carboxylic acid derivatives have been synthesized. Structural studies of these noncrystalline complexes have been performed using a methodology that combines laboratory and synchrotron techniques, supported by ...
Anna Wolska, Aleksandra Drzewiecka-Antonik, Cristina Aparecida Barboza, Marta Struga, Joanna Stefanska, Pawel Rejmak, Marcin Klepka   +6 more
doaj   +2 more sources

Synthesis of new flavonoid derivatives based on 3-hydroxy-4′-dimethylamino flavone and study the activity of some of them as antifungal

Heliyon, 2022
Chalcone was prepared in a new route by reacting o-hydroxyacetophenone with 4-dimethylaminobenzaldehyde using piperidine as a catalyst. 3-Hydroxy-2-[4-(dimethylamino)phenyl] benzopyran-4-one were prepared by Algar-Flynn-Oyamada method by cyclization of ...
Hadi Aqel Khdera, Sawsan Youseff Saad, Aoula Moustapha, Farouk Kandil   +3 more
doaj   +1 more source

Sustainable synthesis of benzopyran derivatives catalyzed by MgO nanoparticles: Spectral, DFT and TEM analysis

Results in Chemistry, 2023
In current work, a magnesium oxide nanocatalyst was synthesized via greener route using aloe-vera plant leaf extracts as a reducing and stabilizing agent to construct MgO nanoparticle.
Har Lal Singh, Mamta Chahar, Sangeeta, Saloni Sahal, Sarita Khaturia   +4 more
doaj   +1 more source

Medicinal significance of novel coumarin analogs: Recent studies

Results in Chemistry, 2022
Coumarin is a versatile scaffold with outstanding biological potential and played a key role in the field of medicine. The benzopyran-2-one ring bearing heterocycles are known for antimicrobial, anti-cancer, and antioxidant activities.
Sharanabasappa B. Patil
doaj   +1 more source

AKTIVITAS BEBERAPA SENYAWA TURUNAN BENZOPIRAN (CHROMONES) DAN BENZOFURANON (COUMARANONES) TERHADAP Steinernema feltiae (The Activities of Benzopyran (Chromones) and Benzofuranones (Coumaranones) Derivatives against Steinernema feltiae)

Jurnal Kedokteran Hewan, 2016
This study was purposed to inquire the activities of benzopyran (chromones) and benzofuranones (coumaranones) derivatives against Steinernema feltiae (S. feltiae). The toxicity assay against S.
Khairan Khairan, Muhammad Bahi, Claus Jacob, Rinaldi Idroes   +3 more
doaj   +1 more source

Unexpected Formation of 4-[(1-Carbamoyl-3-oxo-1,3-dihydro-2-benzofuran-1-yl)amino]benzoic Acid from 4-[(3-Amino-1-oxo-1H-2-benzopyran-4-yl)amino]benzoic Acid

Molbank, 2022
With the aim of obtaining derivatives belonging to 2′,3′-diphenyl-3H-spiro[[2]benzofuran-1,4′-imidazole]-3,5′(3′H)-dione nucleus, we synthesized 4-[(3-amino-1-oxo-1H-2-benzopyran-4-yl)amino]benzoic acid (a 3,4-diaminoisocoumarine derivative), a known ...
Ricaurte Rodríguez, Felipe Quiroga-Suavita, Mónica Yadira Dotor Robayo   +2 more
doaj   +1 more source

Asymmetric Sequential Michael Addition and Cyclization Reactions of 2-(2-Nitrovinyl)phenols Catalyzed by Bifunctional Amino-Squaramides

SynOpen, 2021
In this work, we describe the Michael addition–cyclization reaction of 2-(2-nitrovinyl)phenol with two different reactive Michael donors, which lead to chiral benzopyran derivatives.
Eva Veverková, Pavlína Molnosiová, Radovan Šebesta   +2 more
doaj   +1 more source

Synthesis and Biological Evaluation of Some New Coumarin Derivatives

Molecules, 2003
Pyrimidino[5`,4`-6,5]-,pyridino[3`,2`-6,5]- and pyrrolo[3`,2`-5,6]4H-pyrano-[3,2-c][1]benzopyran-6-one derivatives (5-7 and 10) could be obtained via reaction of 2-amino-4-(p-bromophenyl)-3-cyano(carboethoxy)-4H,5H-pyrano[3,2-c][1]benzopyran-5-ones (3a,b)
M. Y. El-Kady, M. S. Mostafa, M. A. Al-Haiza   +2 more
doaj   +1 more source