Results 21 to 30 of about 36,585 (245)

Synthesis, Structure and Antileishmanial Evaluation of Endoperoxide–Pyrazole Hybrids

Molecules, 2022
Leishmaniases are among the most impacting neglected tropical diseases. In attempts to repurpose antimalarial drugs or candidates, it was found that selected 1,2,4-trioxanes, 1,2,4,5-tetraoxanes, and pyrazole-containing chemotypes demonstrated activity ...
Patrícia S. M. Amado, Inês C. C. Costa, José A. Paixão, Ricardo F. Mendes, Sofia Cortes, Maria L. S. Cristiano   +5 more
doaj   +1 more source

Chiral versus achiral crystal structures of 4-benzyl-1H-pyrazole and its 3,5-diamino derivative

Acta Crystallographica Section E: Crystallographic Communications
The crystal structures of 4-benzyl-1H-pyrazole (C10H10N2, 1) and 3,5-diamino-4-benzyl-1H-pyrazole (C10H12N4, 2) were measured at 150 K. Although its different conformers and atropenantiomers easily interconvert in solution by annular tautomerism and/or ...
Emily R. Hayward, Matthias Zeller, Gellert Mezei   +2 more
doaj   +1 more source

Choline chloride/urea as a green and efficient deep eutectic solvent in three-component and four-component synthesis of novel pyrazole and pyrano[2,3-c] pyrazole derivatives with antibacterial and antifungal activity

Frontiers in Chemistry
In this study, choline chloride/urea was used as a green deep eutectic solvent in the three-component reaction of hydrazine/phenylhydrazine, malononitrile, and aromatic aldehydes for synthesizing pyrazole derivatives, and in the four-component reaction ...
Israa Habeeb Naser, Hassan Thoulfikar A. Alamir, Ali Hisham Al-Shukarji, Batool Ali Ahmed, Talal Aziz Qassem, Maher Kamal, Tahani M. Almeleebia, Enas R. Alwaily, Eftikhaar Hasan Kadhum, Ahmed Alawadi, Ahmed Alawadi, Ahmed Alawadi, Ali Alsalamy   +12 more
doaj   +1 more source

Styrylpyrazoles: Properties, Synthesis and Transformations

Molecules, 2020
The pyrazole nucleus and its reduced forms, pyrazolines and pyrazolidine, are privileged scaffolds in medicinal chemistry due to their remarkable biological activities. A huge number of pyrazole derivatives have been studied and reported over time.
Pedro M. O. Gomes, Pedro M. S. Ouro, Artur M. S. Silva, Vera L. M. Silva   +3 more
doaj   +1 more source

A Computational Study of the NMR Chemical Shifts of Polynitropyrazoles. [PDF]

Magn Reson Chem
The 1H, 13C, 15N, and 17O chemical shifts of 91 nitro‐1H‐pyrazoles at GIAO/B3LYP/6‐311++G(d,p) level. The calculated chemical shifts were compared with available experimental data using an empirical equation that relates absolute shieldings to chemical shifts.
Alcorta A, Claramunt RM, Elguero J, Alkorta I.   +3 more
europepmc   +2 more sources

Using the Photostationary State of Arylazopyrazoles to Control Phase Transitions of Liquid Crystals

Advanced Functional Materials, EarlyView.
A series of new arylazopyrazole photoswitches is designed as dopants for liquid crystalline materials. Unprecedented, the distribution of photoisomers at the photostationary state upon irradiation with light of specific wavelengths (365, 460, 520 nm) is used to control the liquid crystalline phase transitions under isothermal conditions, including ...
Tobias Thiele, Kristina Hrybenko, Christoph Wölper, Michael Giese   +3 more
wiley   +1 more source

Doxorubicin‐Loaded Metal–Organic Framework for Ferroptosis‐Enhanced Chemotherapy Through Sustained Zn Release and Glutathione Peroxidase Downregulation

Advanced Healthcare Materials, EarlyView.
A robust zinc‐based metal–organic framework (ZnMOF) enables dual functions of doxorubicin delivery and sustained Zn2+ release to trigger ferroptosis‐enhnaced chemotherapy. DOX@ZnMOF effectively depletes intracellular glutathione, suppresses GPX4, and elevates reactive oxygen species, leading to efficient oxidative DNA damage and apoptosis.
Xin Ma, Chenghua Deng, Chaoyu Wang, Langston Tilman, Jinhong Li, Wenbin Lin   +5 more
wiley   +1 more source

Dual‐Functional Polyphosphoesters for Gene Delivery: Synergistic Effects of Guanidinium and Hydrophobic Side Chains in Degradable Polymers

Advanced Healthcare Materials, EarlyView.
This study presents guanidinium‐ and indole‐functionalized polyphosphoesters as degradable, non‐viral gene delivery vectors. Through precise tuning of charge density and hydrophobicity, these polymers form stable polyplexes with low toxicity. Remarkably, minor structural changes yield up to 200‐fold differences in transfection efficiency, highlighting ...
Markus Kötzsche, Andreas Dzierza, Jan Egger, Timo Rheinberger, Christin Weilandt, Frederik R. Wurm, Ivo Nischang, Dagmar Fischer, Kalina Peneva   +8 more
wiley   +1 more source

A new polyazomethine-based pyrazole moiety and its reinforced nanocomposites @ ZnO for antimicrobial applications

Designed Monomers and Polymers
A new class of biologically active polyazomethine/pyrazole and their related nanocomposites, polyazomethine/pyrazole/zinc oxide nanoparticles, have been successfully synthesized through the polycondensation technique in the form of polyazomethine ...
Aqilah A. Hakami, Hajar S. Alorfi, Thoraya A. Farghaly, Mahmoud A. Hussein   +3 more
doaj   +1 more source

Crystal structure and molecular docking studies of new pyrazole-4-carboxamides

Heterocyclic Communications, 2019
Two pyrazol-4-carboxamides, 3-(difluoromethyl)-N-(mesitylcarbamoyl)-1-methyl-1H-pyrazole-4-carboxa-mide (7a) and 3-(difluoromethyl)-N-((3,5-dimethylphenyl) carbamoyl)-1-methyl-1H-pyrazole-4-carboxamide (7b) were synthesized and their structures were ...
Qiao Li, Cai Peng-Peng, Shen Zhong-Hua, Wu Hong-Ke, Tan Cheng-Xia, Weng Jian-Quan, Liu Xing-Hai   +6 more
doaj   +1 more source