Results 81 to 90 of about 358,569 (255)

Antimycobacterial activity of nitrogen heterocycles derivatives: 7-(pyridine-4-yl)-indolizine derivatives. Part VII8–12

Journal of Enzyme Inhibition and Medicinal Chemistry, 2017
A series of 13 compounds having a monoindolizine mono-salt skeleton was designed and synthesised in order to evaluate their antimycobacterial activity.
Anda-Mihaela Olaru, Violeta Vasilache, Ramona Danac, Ionel I. Mangalagiu   +3 more
doaj   +1 more source

A Pyridinium Ylide-alkylation Strategy for the Structural Diversification of N-Carbamoyl Pyridinium Salts

A pyridinium-ylide alkylation strategy has been developed for accessing N,N-disubstituted carbamoyl pyridinium salts that possess multiple nucleophilic sites.
Michael, Taylor, Benjamin, Gossett, Akash, Sarkar   +2 more
core   +1 more source

Late‐Stage Functionalization of Peptides on the Solid Phase

Angewandte Chemie International Edition, EarlyView.
Peptide modifications are essential to control pharmacodynamic and pharmacokinetic properties of peptide drugs. Consequently, strategies that allow for efficient and rapid incorporation of non‐canonical modifications into peptides in parallel formats are highly sought after.
Marius Werner, Truc Lam Pham, Franziska Thomas   +2 more
wiley   +1 more source

Synthesis and crystal structure of a new pyridinium bromide salt: 4-methyl-1-(3-phenoxypropyl)pyridinium bromide

Acta Crystallographica Section E: Crystallographic Communications, 2017
In the cation of the title molecular salt, C15H18NO+·Br−, the pyridinium and phenyl rings are inclined to one another by 11.80 (8)°. In the crystal, the Br− anion is linked to the cation by a C—H...Br hydrogen bond.
Musa A. Said, Mohamed R. Aouad, David L. Hughes, Meshal A. Almehmadi, Mouslim Messali   +4 more
doaj   +1 more source

Partial Reduction of Pyridinium Salts as a Versatile Route to Dihydropyridones. [PDF]

ChemInform, 2005
AbstractFor Abstract see ChemInform Abstract in Full Text.
Donohoe, T, Johnson, D, Mace, L, Bamford, M, Ichihara, O   +4 more
openaire   +2 more sources

Metal-free synthesis of novel indolizines from chromones and pyridinium salts via 1,3-dipolar cycloaddition, ring-opening and aromatization

Tetrahedron Letters, 2019
A simple, efficient, and economical synthetic approach to construct a variety of stucturally novel indolizines bearing a phenolic hydroxy group has been developed through 1,3-dipolar cycloaddition of chromones and pyridinium salts.
Kai Dong, Qiang Huang
semanticscholar   +1 more source

Overcrowded Alkene Photo‐Redox‐Switches Based on Quinolinium/Carbene Building Blocks

Angewandte Chemie International Edition, EarlyView.
A modular synthesis of a new class of photo‐ and redox‐switches is described based on the combination of quinolinium salts and carbenes. Photochemical switching allows to selectively switch between folded E/Z isomers, while electrochemical switching allows to change between neutral, radical cation and dicationic oxidation states, which are all isolable
Chris Burdenski, Patrick W. Antoni, Marcel E. Baumert, Leonie Ziemann, Samaresh C. Sau, Julian J. Holstein, Maria Castro, Nitin Kumar, Ofer Filiba, Igor Schapiro, Max M. Hansmann   +10 more
wiley   +1 more source

Synthesis, Reactivity and Stability of Aryl Halide Protecting Groups towards Di-Substituted Pyridines

Indonesian Journal of Chemistry, 2016
This paper reports the synthesis and reactivity of different Benzyl derivative protecting groups. The synthesis and stability of Benzyl halides, 4-methoxybenzyl halides, 3,5-dimethoxybenzyl halides, 3,4-dimethoxybenzyl halides, 3,4,5-trimethoxybenzyl ...
Ptoton Mnangat Brian, Peter Musau
doaj   +1 more source

Advanced Separation Technologies for Light Olefin and Alkane (C2‐C4): Recent Advances in Extraction, Adsorption, and Membrane Separation

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT With the rapid development of the petrochemical industry, efficient separation technology for olefins and alkanes with the same number of carbon atoms has become an important research topic to enhance the efficiency of petroleum resource utilization and optimize product quality.
Shasha Zhao, Kang Zhao, Zhen Liu
wiley   +1 more source

Enantioselective Synthesis of Dihydropyridines Containing Quaternary Stereocenters Through Dearomatization of Pyridinium Salts

ACS Catalysis, 2019
Enantioselective synthesis of nonaromatic heterocycles containing a fully substituted stereogenic center is a challenging synthetic problem. We describe a strategy toward this problem involving dearomatization of N-alkylpyridinium salts using boronic ...
Donovan J Robinson, S. P. Spurlin, J. Gorden, Rashad R. Karimov   +3 more
semanticscholar   +1 more source