Results 81 to 90 of about 19,339 (247)

Selective synthesis of 4-(sulfonyl)-methyl-1H-pyrazoles and (E)-4,5-dihydro-1H-pyrazoles from N-allenic sulfonylhydrazones [PDF]

, 2014
National Natural Science Foundation of China [21272190]; PCSIRT in University; NFFTBS [J1210014]Selective synthesis of 4-(sulfonyl)-methyl-1H-pyrazoles and (E)-4,5-dihydro-1H-pyrazoles from N-allenic sulfonylhydrazones with sulfonyl group migrations has ...
Xiao, Yu-Wei, 林敏, Lin, Min, Zhou, Yun-Bin, Zhan, Zhuang-Ping, Zhu, Yu, Hong, Jun-Jie, 詹庄平   +7 more
core  

Ullmann‐Type N‐Heteroarylation of Nitrogen Heterocycles Catalyzed by Heterogeneous CuNPs/HKUST‐1

EcoEnergy, EarlyView.
A practical strategy for the direct synthesis of CuNPs/HKUST‐1 heterogeneous catalyst was developed and used for the catalyzing Ullmann‐type N‐arylation of N‐heterocycles with high yields, excellent recyclability, and low copper leaching. ABSTRACT Ullmann‐type C–N coupling is an essential reaction to construct functional nitrogen heterocycles, whereas ...
Shuai Yang, Fangshu Han, Yamin Dong, Liangting Wu, Wenchao Tang, Changyan Guo, Jide Wang, Ablimit Abdukader, Chenjiang Liu, Yonghong Zhang   +9 more
wiley   +1 more source

Synthesis of Zwitterionic Tris(pyrazolyl) Ligands and Their Mn(II) Bis‐Chelates Exhibiting Charge–Transfer‐Induced Spin Crossover

European Journal of Inorganic Chemistry, EarlyView.
In this article, a series of zwitterionic scorpionate ligands based on the anionic tris‐(pyrazolyl)borate ligand scaffold is presented. These ligands are used to prepare bis‐chelates with divalent manganese ions. The resulting complexes are studied via magnetic, crystallographic, and electrochemical means to characterize the charge–transfer‐induced ...
Matthew C. Kessinger, Tzu‐Ching Cheng, Cameron Brillhart, Sreenivasulu Chinnabattigalla, Carla Slebodnick, Amanda J. Morris   +5 more
wiley   +1 more source

Synthesis, Spectroscopic Characterization, Structural Analysis, and Evaluation of Anti-Tumor, Antimicrobial, and Antibiofilm Activities of Halogenoaminopyrazoles Derivatives

Antibiotics
New haloaminopyrazole derivatives differing in the number of pyrazole nuclei 4a–f and 5a–e, respectively, were synthesized and characterized by 1H-NMR, 13C-NMR, IR, UV-Vis, and elemental analysis.
Christina Zalaru, Florea Dumitrascu, Constantin Draghici, Marilena Ferbinteanu, Isabela Tarcomnicu, Maria Marinescu, Zenovia Moldovan, George Mihai Nitulescu, Rodica Tatia, Marcela Popa   +9 more
doaj   +1 more source

Direct α-Imination of N-Acyl Pyrazoles with Nitrosoarenes

, 2019
Unprecedented α-imino N-acyl pyrazoles were efficiently and selectively prepared through the 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD)-catalyzed reaction of nitrosoarenes with N-acyl pyrazoles via an N-nitroso aldol reaction/dehydration sequence.
Overgaard J., Lattanzi A., Meninno S., Mirra G., Capobianco A., Volpe C.   +5 more
core   +1 more source

The Expanding Role of Diazirines in Synthetic Methodology

European Journal of Organic Chemistry, EarlyView.
Beyond their established role in photoaffinity labeling, diazirines have emerged as versatile reagents in synthetic chemistry. This review highlights their dual reactivity as carbene and nitrogen‐transfer precursors, showcasing mechanistic insights and diverse applications in cyclopropanations, cycloadditions, skeletal editing, amination, heterocycle ...
Viktor Savic, Dominik Schnalzer, Marko D. Mihovilovic, Michael Schnürch   +3 more
wiley   +1 more source

Current strategies to enhance the target efficiency of advanced multifunctional ultrasound contrast agents in ischemic diseases

Interdisciplinary Medicine, EarlyView.
The graphical abstract outlines a novel multifunctional ultrasound contrast agent for the diagnosis and treatment of ischemic diseases, along with innovative strategies to enhance its targeting efficiency. Abstract Ischemic diseases, such as myocardial infarction, stroke, and peripheral ischemia, are leading causes of death and disability worldwide ...
Yangyang Zhou, Jing Lin, Yu Chen, Jiaqi Zhao   +3 more
wiley   +1 more source

Filling the Gap: Chemistry of 3,5-Bis(trifluoromethyl)-1H-pyrazoles

, 2012
Pyrazoles represent important building blocks for the preparation of bioactive compounds and a large variety of materials, due to their rich coordination chemistry.
Monticelli D, Penoni A., Maspero A, Tagliapietra S, GIOVENZANA, Giovanni Battista, Palmisano G   +5 more
core   +1 more source

Anticancer potential of berberine: Molecular pathways and current clinical trial perspectives

JSFA reports, EarlyView.
Abstract Cancer is constantly rising mortality rates due to its late prognosis, poor management, and expensive treatment. Multi‐sectoral approaches for cancer management include hygienic practices, synthetic drug exploitation, radiation therapy, and diet modifications.
Muhammad Maaz, Muhammad Tauseef Sultan, Muhammad Israr, Waqas Ahmad Khan, Fahad Tanveer, Muzzamal Hussain, Muhammad Imran, Ahmed Mujtaba, Anjuman Gul Memon, Muhammad Atif, Entessar Al Jbawi   +10 more
wiley   +1 more source

Multicomponent Synthesis of New Fluorescent Boron Complexes Derived from 3-Hydroxy-1-phenyl-1H-pyrazole-4-carbaldehyde

Molecules
Novel fluorescent pyrazole-containing boron (III) complexes were synthesized employing a one-pot three-component reaction of 3-hydroxy-1-phenyl-1H-pyrazole-4-carbaldehyde, 2-aminobenzenecarboxylic acids, and boronic acids.
Viktorija Savickienė, Aurimas Bieliauskas, Sergey Belyakov, Eglė Arbačiauskienė, Algirdas Šačkus   +4 more
doaj   +1 more source