Results 1 to 10 of about 3,222 (114)

Effect of caffeine and other xanthines on liver sinusoidal endothelial cell ultrastructure [PDF]

open access: yesScientific Reports, 2023
Xanthines such as caffeine and theobromine are among the most consumed psychoactive stimulants in the world, either as natural components of coffee, tea and chocolate, or as added ingredients.
Hong Mao   +12 more
doaj   +2 more sources

Q-Tube®-Assisted Alkylation and Arylation of Xanthines and Other N-H-Containing Heterocycles in Water

open access: yesChemistry, 2021
In this paper, a simple and clean process for the alkylation and arylation of nitrogen-containing heterocycles is reported. The reactions were conducted using the Q-tube® as a non-conventional technology, in water as a green solvent, at overboiling ...
Lenardão E J   +2 more
exaly   +3 more sources

Xanthines Studied via Femtosecond Fluorescence Spectroscopy

open access: yesMolecules, 2016
Xanthines represent a wide class of compounds closely related to the DNA bases adenine and guanine. Ubiquitous in the human body, they are capable of replacing natural bases in double helices and give rise to four-stranded structures. Although the use of
Thomas Gustavsson   +2 more
exaly   +3 more sources

Recent Advances in the Synthesis of Xanthines: A Short Review [PDF]

open access: yesScientifica, 2022
Xanthine and its derivatives are considered a pharmacologically potential moiety that manifests immense biological activities. Owing to this much diversity in the biological field, this scaffold has fascinated the attention of many researchers around the
Anandi Kapri, Nitin Gupta, Sumitra Nain
doaj   +2 more sources

Microwave-assisted reactions: Efficient and versatile one-step synthesis of 8-substituted xanthines and substituted pyrimidopteridine-2,4,6,8-tetraones under controlled microwave heating

open access: yesGreen Processing and Synthesis, 2021
A green, simple one-pot microwave-assisted synthesis of xanthines and pyrimidopetridines was developed with a high EcoScale and yields.
Sara M Mostafa   +2 more
exaly   +2 more sources

Diagnosing Parkinson’s disease and monitoring its progression: Biomarkers from combined GC-TOF MS and LC-MS/MS untargeted metabolomics [PDF]

open access: yesHeliyon
Parkinson's disease (PD) is a prevalent neurodegenerative disorder with a poorly understood etiology. An accurate diagnosis of idiopathic PD remains challenging as misdiagnosis is common in routine clinical practice.
Lina A. Dahabiyeh   +4 more
doaj   +2 more sources

Modulatory Effects of Caffeine and Pentoxifylline on Aromatic Antibiotics: A Role for Hetero-Complex Formation

open access: yesMolecules, 2021
Antimicrobial resistance is a major healthcare threat globally. Xanthines, including caffeine and pentoxifylline, are attractive candidates for drug repurposing, given their well-established safety and pharmacological profiles.
Anna Woziwodzka   +6 more
doaj   +1 more source

Experimental and Theoretical Studies on Acid Corrosion Inhibition of API 5L X70 Steel with Novel 1-N-α-d-Glucopyranosyl-1H-1,2,3-Triazole Xanthines

open access: yesMolecules, 2023
A series of novel 1-N-α-d-glucopyranosyl-1H-1,2,3-triazole xanthines was synthesized from azido sugars (glucose, galactose, and lactose) and propargyl xanthines (theophylline and theobromine) using a typical copper (I)-catalyzed azide–alkyne 1,3-dipolar ...
Alma Sánchez-Eleuterio   +9 more
doaj   +1 more source

Electrochemical Analysis of the Influence of Purines on Copper, Steel and Some Other Metals Corrosion

open access: yesMetals, 2022
Metals stability and corrosion resistance are very important factors that influence the possibility of their applications. In order to study and foresee the behavior of metals during various applications in all kinds of conditions and media, numerous ...
Marija B. Petrović Mihajlović   +4 more
doaj   +1 more source

A Perspective on Natural and Nature-Inspired Small Molecules Targeting Phosphodiesterase 9 (PDE9): Chances and Challenges against Neurodegeneration

open access: yesPharmaceuticals, 2021
As life expectancy increases, dementia affects a growing number of people worldwide. Besides current treatments, phosphodiesterase 9 (PDE9) represents an alternative target for developing innovative small molecules to contrast neurodegeneration.
Giovanni Ribaudo   +2 more
doaj   +1 more source

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