Results 1 to 10 of about 44,980 (368)

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
exaly   +7 more sources

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 [PDF]

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   +3 more sources

One pot synthesis, antimicrobial and antioxidant activities of fused uracils: pyrimidodiazepines, lumazines, triazolouracil and xanthines

open access: yesChemistry Central Journal, 2017
Background Uracil derivatives have a great attraction because they play an important role in pharmacological activities. Pyrimidodiazepines, lumazines, triazolopyrimidines and xanthines have significant wide spectrum activities including anticancer ...
Samar El-kalyoubi   +2 more
exaly   +4 more sources

Efficacy and safety profile of xanthines in COPD: a network meta-analysis

open access: yesEuropean Respiratory Review, 2018
Theophylline can still have a role in the management of stable chronic obstructive pulmonary disease (COPD), but its use remains controversial, mainly due to its narrow therapeutic window. Doxofylline, another xanthine, is an effective bronchodilator and
Victor K Kornev   +2 more
exaly   +4 more sources

The Transcriptional Repressor Orphan Nuclear Receptor TLX Is Responsive to Xanthines. [PDF]

open access: yesACS Pharmacol Transl Sci, 2021
The orphan nuclear receptor tailless homologue (TLX) is expressed almost exclusively in neural stem cells acting as an essential factor for their survival and is hence considered as a promising drug target in neurodegeneration.
Faudone G   +10 more
europepmc   +2 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
Pascale Changenet-Barret   +3 more
doaj   +2 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

Fast, Efficient, and Versatile Synthesis of 6-amino-5-carboxamidouracils as Precursors for 8-Substituted Xanthines

open access: yesFrontiers in Chemistry, 2019
Substituted xanthine derivatives are important bioactive molecules. Herein we report on a new, practical synthesis of 6-amino-5-carboxamidouracils, the main building blocks for the preparation of 8-substituted xanthines, by condensation of 5,6 ...
Daniel Marx   +4 more
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.
Ramadan Ahmed Mekheimer   +2 more
exaly   +2 more sources

Determination of Flavonoids, Phenolic Acids, and Xanthines in Mate Tea (Ilex paraguariensis St.-Hil.)

open access: yesJournal of Analytical Methods in Chemistry, 2013
Raw material, different formulations of foods, and dietary supplements of mate demands control of the content of bioactive substances for which high performance thin layer chromatography (TLC), described here, presents simple and rapid approach for ...
Mirza Bojić   +3 more
doaj   +2 more sources

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