Results 71 to 80 of about 60,238 (275)

Discovery of Quinazolone Pyridiniums as Potential Broad-Spectrum Antibacterial Agents

Molecules
The overprescription of antibiotics in medicine and agriculture has accelerated the development and spread of antibiotic resistance in bacteria, which severely limits the arsenal available to clinicians for treating bacterial infections.
Jie Dai, Qianyue Li, Ziyi Li, Zhonglin Zang, Yan Luo, Chenghe Zhou   +5 more
doaj   +1 more source

Metal-Free Aziridination of Unactivated Olefins via Transient N-Pyridinium Iminoiodinanes [PDF]

We describe a metal-free aziridination of unactivated olefins to generate N-pyridinium aziridines, which participate in cross-coupling to afford N-aryl aziridines and reductive depyridylation to afford N–H aziridines.
Isaac, Deavenport, Hao, Tan, David, Powers, Cali, Kucifer, Phong, Thai, Uddalak , Sengupta   +5 more
core   +2 more sources

Disinfection effect of hexadecyl pyridinium chloride on SARS-CoV-2 in vitro

Intervirology, 2022
The novel coronavirus (COVID-19 or 2019-nCoV) is a respiratory virus that can exist in the mouth and saliva of patients and spreads through aerosol dispersion.
Ke-da Chen, Fei-ke Ma, Qing-jing Wang, Ying Wang, Xin-yi Zhuang, Xu-ning Zhang, Hai-yan Mao, Yan-jun Zhang   +7 more
doaj   +1 more source

Nahinfrarot‐Photoschalten durch direkte Anregung—die nächste Herausforderung

Angewandte Chemie, EarlyView.
Molekulare Photoschalter können endlich direkt mit Licht aus dem Nahinfrarotbereich angeregt werden. Dieser Kurzaufsatz fasst den derzeitigen Entwicklungsstand, die Designprinzipien für niedrigenergetische Lichtresponsivität und die dadurch möglichen außergewöhnlichen Anwendungen zusammen.
Diptiprava Sahoo, Elias Ciekalski, Henry Dube   +2 more
wiley   +1 more source

Crystal structure of 4,4′-[(1,3,5,7-tetraoxo-1,3,3a,4,4a,5,7,7a,8,8a-decahydro-4,8-ethenopyrrolo[3,4-f]isoindole-2,6-diyl)bis(methylene)]bis(pyridin-1-ium) dinitrate

Acta Crystallographica Section E: Crystallographic Communications, 2015
In the title salt, C24H22N4O42+·2NO3−, the cation is U-shaped with the two isoindole dione rings inclined to one another by 60.41 (13)°, while the two outer pyridine rings are inclined to one another by 2.77 (12)°.
Zhimin Liu
doaj   +1 more source

Pyridinium ylids in heterocyclic synthesis

, 2011
Pyridinium ylids are versatile tools in organic synthesis. The stability of pyridinium ylids and their generation is commented. This review gives an overview of the possible modes through which pyridinium ylids can react.
Jan Jacobs, Eva Van Hende, De Kimpe, Norbert, Sven Claessens, Van Hende, Eva, Norbert De Kimpe, Jacobs, Jan, Claessens, Sven   +7 more
core   +1 more source

Comparative photodynamic inactivation of bioluminescent E. coli by pyridinium and inverted pyridinium chlorins [PDF]

, 2020
Photodynamic inactivation (PDI) is a therapeutic approach in study due to the ability to reduce or completely eliminate the bacterial strains without the development of resistance mechanisms.
Lourenço, Leandro M.O., Calmeiro, Joana M.D., Almeida, Adelaide, Dias, Cristina J., Ramos, Catarina I.V., Tomé, João P.C., Faustino, Maria A.F.   +6 more
core   +1 more source

Cooperative Al(Salen)-Pyridinium Catalysts for the Asymmetric Synthesis of <em>trans</em>-Configured β-Lactones by [2+2]-Cyclocondensation of Acylbromides and Aldehydes: Investigation of Pyridinium Substituent Effects

Molecules, 2012
The <em>trans</em>-selective catalytic asymmetric formation of β-lactones constitutes an attractive surrogate for <em>anti</em>-aldol additions.
René Peters, Katja Latendorf, Patrick Meier, Florian Broghammer, Guntram Rauhut   +4 more
doaj   +1 more source

New Constituents from the Korean Sponge Plakortis simplex

Marine Drugs, 2013
Six new cyclic peroxides (1–6) were isolated from the Korean sponge Plakortis simplex, along with two new alkylpyridinium alkaloids (7 and 8). The structures of these compounds were completely determined by a combination of NMR analysis and chemical ...
Ok-Hwa Kang, Buyng Su Hwang, Jung-Rae Rho, Dong-Yeul Kwon, Jung Soon Oh   +4 more
doaj   +1 more source

2-[5-(Pyridin-2-yl)-1,3,4-thiadiazol-2-yl]pyridin-1-ium perchlorate

IUCrData, 2017
The cation of the title molecular salt, C12H9N4S+·ClO4−, is approximately planar, with the pyridine and pyridinium rings being inclined to the central thiadiazole ring by 6.51 (9) and 9.13 (9)°, respectively.
Abdelhakim Laachir, Fouad Bentiss, Salaheddine Guesmi, Mohamed Saadi, Lahcen El Ammari   +4 more
doaj   +1 more source