Results 231 to 240 of about 3,124,995 (289)

Development of Membrane-Targeting Osthole Derivatives Containing Pyridinium Quaternary Ammonium Moieties with Potent Anti-Methicillin-Resistant Staphylococcus aureus Properties.

Journal of Medicinal Chemistry
Methicillin-resistant Staphylococcus aureus (MRSA) is a leading cause of hospital- and community-acquired infections, necessitating the development of novel antibacterials.
Ting Xu, Zihan Xue, Xinhui Li, Miaomiao Zhang, Ruige Yang, Shangshang Qin, Yong Guo   +6 more
semanticscholar   +1 more source

Copper-Catalyzed Formal [4 + 1] Annulation toward Diverse Trifunctionalized Indolizines from Pyridinium 1,4-Zwitterionic Thiolates and Diazos.

Journal of Organic Chemistry, 2023
Pyridinium 1,4-zwitterionic thiolates were regarded as powerful and versatile building blocks to prepare nitrogen- and sulfur-containing heterocycles.
Wen Li, Hexiang Wang, Yuan Zhang, Limin Zhao, Pengfeng Guo, H. Cao, Xiang Liu   +6 more
semanticscholar   +1 more source

Secondary interactions in the isomorphous compounds 2,6-bis(chloromethyl)pyridinium chloride and 2,6-bis(bromomethyl)pyridinium bromide

Acta Crystallographica Section C Crystal Structure Communications, 2004
The title compounds, C7H8Cl2N+.Cl- and C7H8Br2N+.Br-, are isomorphous. In the crystal packing, layers parallel to the ac plane are formed by a classical N(+)-H...X- hydrogen bond (X = halogen) and two X...X contacts. A third X...X contact links the layers, and a fourth, which is however very long, completes a ladder-like motif of halogen atoms ...
Virginia, Lozano, Peter G, Jones
openaire   +2 more sources

ChemInform Abstract: PYRIDINIUM SALTS OF HALOGENATED HETEROCYCLIC COMPOUNDS

Chemischer Informationsdienst, 1975
AbstractPentachlorpyridin (I) ergibt bei 50°C mit überschüssigem Pyridin (II) das Salz (III), das mit Dimethylamin (IV) in Wasser zu dem roten Derivat (V) gespalten wird.
R. D. CHAMBERS, W. K. R. MUSGRAVE, P. G. URBEN   +2 more
openaire   +1 more source

Antiradiation compounds. 20. 1-Methylquinolinium(and pyridinium)-2-dithioacetic acid derivatives

Journal of Medicinal Chemistry, 1987
A new class of radiation-protective compounds has been found in the bis(methylthio) and methylthio amino derivatives of 1-methylquinolinium- and 1-methylpyridinium-2-dithioacetic acids. The compounds gave good protection to mice vs. 1000-rad gamma-radiation in ip doses of 10 mg/kg or less, much lower than those required for the aminoalkyl thiols ...
W O, Foye, R W, Jones, P K, Ghoshal, B, Almassian   +3 more
openaire   +2 more sources

Electron density distribution in a thiourea pyridinium nitrate inclusion compound

Journal of Molecular Structure, 2006
Abstract The study presented has been focussed on characterization of electron density distribution in a thiourea pyridinium nitrate inclusion system [ ( NH 2 ) 2 CS ] 2 ( C 5 H 5 NH ) + NO 3 − by quantum chemistry (DFT) calculations.
J.N. Latosińska, A. Pajzderska, J. Węsicki   +2 more
openaire   +1 more source

On the reported pyridinium pentachlorothallate(III) and some related compounds

Inorganica Chimica Acta, 1984
Abstract While (C 5 H 6 N) 2 TlCl 5 cannot be prepared in water via the reported procedure it may be obtained in non-aqueous media. Although its low-energy infrared spectrum contains broad peaks and the Raman spectrum is deceptively simple, comparison of these spectra with those of other TlCl 4 − , TlCl 5 3− and TlCl 6 3− derivatives shows that
Mary B. Millikan, Bruce D. James
openaire   +1 more source

New pyridinium salts as versatile compounds for dye sensitized photopolymerization

European Polymer Journal, 2013
A series of pyridinium salts were synthesized and investigated as new dyes for photoinitiating systems of polymerization. They exhibit a strong absorption at about 550 nm well matching with the visible light emission of different convenient visible light sources.
Tehfe, Mohamad Ali, Zein-Fakih, Abbas, Lalevée, Jacques, Dumur, Frédéric, Gigmes, Didier, Graff, Bernadette, Morlet-Savary, Fabrice, Hamieh, Tayssir, Fouassier, Jean Pierre   +8 more
openaire   +1 more source

Discovery of an intermediate phase in bis-thiourea pyridinium chloride inclusion compound

The Journal of Chemical Physics, 2009
This paper reports the occurrence of a new phase for bis-thiourea pyridinium chloride inclusion compound, which is intermediate to the high- and low-temperature ones already reported. The structure of the intermediate phase was determined by the x-ray diffraction and the following sequence of space groups was obtained: Cmcm⟶237 KCmc21⟶206 KPbca.
Pajzderska, Aleksandra, Wąsicki, Jan, Czarnecki, Piotr, Toupet, Loic, Collet, Eric   +4 more
openaire   +2 more sources

Modification of chitosan and chitosan nanoparticle by long chain pyridinium compounds: Synthesis, characterization, antibacterial, and antioxidant activities.

Carbohydrate Polymers, 2019
S. Omidi, A. Kakanejadifard
semanticscholar   +1 more source