Results 21 to 30 of about 14,691 (260)

The chemistry of Brazilian Lauraceae. LXV. 5, 7, 8, 3', 4', 5' - Hexamethoxyflavone from an Aniba species [PDF]

open access: yesActa Amazonica, 1982
Aniba species (Lauraceae) are characterized by the presence of neolignans or of 6-aryl (or 6-styryl-) 2-pyrones. Flavonoids occur either together with pyrones or, in rare cases, as predominant micromolecular type. The branch wood of an Aniba species from
Sergio de H. Cavalcante   +3 more
doaj   +1 more source

Synthesis of cyercenes and yangonin by a pyrone aldol protocol

open access: yesResults in Chemistry, 2021
A number of 6-alkenyl pyrones were synthesized using an aldol reaction followed by a tosylate elimination sequence.
Kyle Podolak, George A. Kraus
doaj   +1 more source

Breaking Down Barriers: CorA Effectively Targets Staphylococcal Biofilms in Vitro and in Vivo. [PDF]

open access: yesChemMedChem
Corallopyronin A (CorA), a natural alpha‐pyrone antibiotic, penetrates Staphylococcus aureus biofilms and inhibits RNA polymerase. This work demonstrates CorA's superior efficacy compared to rifampicin and dalbavancin in reducing viable loads in biofilms both in vitro and in vivo. Graphic created in https://BioRender.com.
De Benedetti S   +21 more
europepmc   +2 more sources

Inverse-Electron-Demand Diels-Alder Reactions of 2-Pyrones: Bridged Lactones and Beyond.

open access: yesChemistry, 2020
Inverse-electron-demande Diels-Alder (IEDDA) reactions of electron-poor 2-pyrones as electrophilic dienes have been extensively studied in the past fifty years.
Guanghao Huang, C. Kouklovsky, A. Torre
semanticscholar   +1 more source

Benzo-pyrones for reducing and controlling lymphoedema of the limbs. [PDF]

open access: yes, 2009
Background Lymphoedema is the accumulation of excess fluid in the body caused by obstruction of the lymphatic drainage mechanisms. Treatment with Benzo-pyrones is thought to reduce fluid forming in the subcutaneous tissues and reduce pain and discomfort ...
Badger, Caroline M. A.   +3 more
core   +1 more source

Adsorption Behaviour of [(4-Hydroxy-6-methyl-2-oxo-2Hpyran- 3-yl)-(4-methoxy-phenyl)-1methyl]-urea on Stainless Steel in Phosphoric Media [PDF]

open access: yes, 2009
The adsorption of [(4-hydroxy-6-methyl-2-oxo-2H-pyran-3-yl)-(4-methoxy-phenyl)- methyl]-urea on iron in phosphoric media was studied by using electrochemical technique. The adsorption mechanism was investigated using adsorption isotherms.
Ajanaku, K. O.   +4 more
core   +3 more sources

Benzyl Furanones and Pyrones from the Marine-Derived Fungus Aspergillus terreus Induced by Chemical Epigenetic Modification

open access: yesMolecules, 2020
Chemical epigenetic modification on a marine-derived fungus Aspergillus terreus RA2905 using a histone deacetylase inhibitor, suberoylanilide hydroxamic acid (SAHA), resulted in a significantly changed metabolic profile.
Jing-Shuai Wu   +7 more
semanticscholar   +1 more source

Two New Bioactive α-Pyrones from Hypericum japonicum

open access: yesMolecules, 2016
Hypericum japonicum (Guttiferae), a type of annual or perennial herb, has been historically applied to cure infectious hepatitis, acute and chronic hepatitis, gastrointestinal disorder, and internal hemorrhage.
Linzhen Hu   +7 more
doaj   +1 more source

استخراج و خالص سازی ماده موثره دارویی γ-Pyrones (خلین و ویسناژین) از گیاه Ammi Visnaga L. [PDF]

open access: yesزیست‌شناسی کاربردی, 2023
گیاه Ammi Visnaga Lam. (تیره جعفری)، از جمله گیاهان دارویی ارزشمند بومی کشور می باشد که حاوی ماده موثرهدارویی γ-Pyrones (عمدتا محتوی خلین و ویسناژین) است.
محمد حاجی ابوالحسنی
doaj   +1 more source

Coumarins, Xanthones and Related Compounds

open access: yesMolecules, 2016
It has long been known that coumarins (γ-pyrones) and xanthones (α-pyrones) together form a large class of naturally occurring compounds exhibiting a wide range of biological activities.[...]
Pascal Richomme
doaj   +1 more source

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