Results 121 to 130 of about 37,807 (249)

The preparation of 1-(β-naphthyl)-3-ferrocenylpyrazole-4-carbaldehyde and syntheses on the base of it

Тонкие химические технологии, 2009
Synthesis of 1-(β-naphthyl)-3-ferrocenyl pyrazole-4-carbaldehyde was carried out from acetylferrocene and naphthalen-2-ylhydrazine followed by intramolecular cyclization under Vilsmeier-Haack conditions.
E. Yu. Osipova, A. A. Simenel, A. N. Rodionov, V. V. Kachala, K. Ya. Zherebker   +4 more
doaj  

Interaction of Methylmercury(II) with N-Substituted Pyrazoles. Sigma-Donor Ability of Pyridines, Imidazoles, and Pyrazoles

, 1982
N-Substituted pyrazoles (L) form complexes [MeHgL]NO, for which 2J(1H-199Hg) decreases with increasing basicity of L in a very similar manner to that observed for closely related N-substituted imidazole complexes.
Canty, AJ (15913241), Lee, CV (15913898)
core  

Revisiting Hydrazine Moiety as a Scaffold for the Synthesis of Potential Antiviral Pyrazole Ribonucleoside Analogues

ChemMedChem, Volume 21, Issue 11, 15 June 2026.
Three series of pyrazole ribonucleoside analogues were designed and synthesized. They were evaluated, along with some of their pronucleotides, for their antiviral activity against RNA viruses. Pyrazole ribonucleoside analogues were prepared via a linear approach starting with the reaction of D‐ribosylhydrazine with 1,3‐dicarbonyl or acrylonitrile ...
Anaïs Guillou, Nathalie Gros, Delphine Muriaux, Suzanne Peyrottes, Jean‐Jacques Vasseur, Michael Smietana, Christophe Mathé   +6 more
wiley   +1 more source

Zinc-Catalyzed Synthesis of Pyrazolines and Pyrazoles via Hydrohydrazination

, 2016
A novel regioselective synthesis of aryl-substituted pyrazolines and pyrazoles has been developed. Substituted phenylhydrazines react with 3-butynol in the presence of a catalytic amount of zinc triflate to give pyrazoline derivatives.
Matthias Beller (1315956), Karolin Alex (2434186), Annegret Tillack (2396164), Nicolle Schwarz (2434189)   +3 more
core   +1 more source

DNA‐Binding Properties of Iridium(III) Complexes Encompassing Design, Function and Biophysical Assessments

ChemPhysChem, Volume 27, Issue 11, 15 June 2026.
This review describes the biophysical techniques used to investigate DNA‐binding phenomena and the progress made so far in the application of iridium(III) complexes for this purpose. Ir(III) complexes offer myriad opportunities in the design and study of DNA‐binding agents and discussed examples are contextualised with complementary studies in ...
Ibrahim S. Alkhaibari, Niklaas J. Buurma, Simon J. A. Pope   +2 more
wiley   +1 more source

Hydrogen bonding lights up overtones in pyrazoles

, 2007
The spectral complexity in the NH stretching mode of hydrogen-bonded pyrazoles is traced back to an extensive Fermi resonance system involving combinations and overtones of at least four aromatic ring modes with significant in plane hydride bending ...
C. A. Rice, Wassermann, Tobias N., Suhm, Martin A., Rice, Corey A., D. Luckhaus, Luckhaus, David, M. A. Suhm, T. N. Wassermann   +7 more
core   +1 more source

Iridium Complexes of a Triazole‐Derived Pincer Ligand: Synthesis, Reactivity, and Transfer Dehydrogenation Catalysis

Chemistry – A European Journal, Volume 32, Issue 22, 9 June 2026.
Ir pincer complexes bearing a triazole architecture in the pincer backbone and O‐ancillary chelating ligands are presented. These were employed in the catalytic transfer dehydrogenation of alkanes as well as of saturated heterocycles. Reactivity of these complexes with silver salts and Lewis acids produced various cationic iridium complexes.
Jesvita Cardozo, Ouchan He, Aaron Prenzlow, Xinyang Peng, Kallol Ray, Thomas Braun   +5 more
wiley   +1 more source

Synthesis of some new 1,3,5-trisubstituted pyrazoles as antioxidant and antiinflammatory agents

, 2019
A series of some new 1,3,5-trisubstituted pyrazoles was synthesized by the reaction of α-β dibromochalcones with phenylhydrazine hydrochloride.
Singh, Jitender, Dua, Jagdeep, Arora, Pragi   +2 more
core   +1 more source

Electrophilic Iodination of Heterocyclic Compounds. Recent Advances 2008–2025: Part II

European Journal of Organic Chemistry, Volume 29, Issue 22, 9 June 2026.
Electrophilic iodination using molecular iodine and iodide sources represents an efficient approach for accessing valuable iodinated organic compounds. This review highlights recent advances in the iodination of heterocyclic compounds from 2008 to 2025, emphasizing the role of heteroaryl iodides as important synthetic intermediates for biologically ...
Njomza Ajvazi, Stojan Stavber
wiley   +1 more source

Synthesis of Substituted Pyrazoles and Imidazolium Salts

, 2019
This summer research was based in organic chemistry. It consisted of pyrazole and imidazolium chloride salt synthesis. Heterocyclic molecules, pyrazoles and imidazolium salts contain three carbon atoms and two nitrogen atoms in their 5-membered rings. In
Nnabuife, Christina
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