Results 51 to 60 of about 16,017 (235)
Synthesis of naphthoquinone derivatives with some study on percentage rate of formation for pyridinium salt / Nor Shazana Mohamed Daud [PDF]
, 2010 The focus of this study is to synthesize the naphthoquinone derivative via the reaction of pyridinium salt with methyl naphthoquinone. The starting material 2,4-dibromoacetophenone reacted with pyridine to produce pyridinium salt in 96.29% yield.
Mohamed Daud, Nor Shazana
core
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 +2 more
wiley +1 more source
2-[(E)-2-(4-Methoxyphenyl)ethenyl]-1-methylpyridinium iodide
Acta Crystallographica Section E, 2013 In the title molecular salt, C16H10NO+·I−, the dihedral angle between the pyridinium and benzene rings is 6.61 (8)°. In the crystal, the cation is linked to the anion by a C—H...I interaction arising from the activated ...
Jiban Podder +4 more
doaj +1 more source
, 2019 In the presence of amines, the degradation of glutaconaldehyde in acidic medium can be prevented. By exploitation of this behavior, primary amines are transformed into their corresponding pyridinium salts, including those substrates that remain ...
Thierry Martens +5 more
core +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 +10 more
wiley +1 more source
Crystal structure of 2-(azaniumylmethyl)pyridinium bis(hydrogen squarate)
Acta Crystallographica Section E: Crystallographic Communications, 2017 The asymmetric unit of the title compound, C6H10N22+·2C4HO4−, comprises two hydrogen squarate (Hsq−; systematic name: 2-hydroxy-3,4-dioxocyclobutanolate) anions and a 2-(azaniumylmethyl)pyridinium dication.
Nina Salamzadeh +3 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 +4 more
openaire +2 more sources
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
Beilstein Journal of Organic Chemistry, 2017 The glycosylation of O-glycosyl trichloroacetimidate donors using a synergistic catalytic system of electron-deficient pyridinium salts/aryl thiourea derivatives at room temperature is demonstrated. The acidity of the adduct formed by the 1,2-addition of
Mukta Shaw +3 more
doaj +1 more source
Molecules, 2011 In the course of studies on hybrid antibacterials incorporating 2-aryl-5-nitro-1H-indole moieties as potential bacterial NorA efflux pump inhibitors, the compound 1-[2-(5-nitro-1H-indol-2-yl)phenyl]methylpyridinium chloride (2) was synthesized and ...
John B. Bremner +3 more
doaj +1 more source