Results 21 to 30 of about 47,136 (264)
Catalytic Photochemical Enantioselective α-Alkylation with Pyridinium Salts
, 2022 We have developed a chiral amine catalyzed enantioselective α-alkylation of aldehydes with amino acid derived pyridinium salts as alkylating reagents. The reaction proceeds in the presence of visible light (390 nm) and in the absence of a photocatalyst ...
Santhivardhana Reddy, Yetra +2 more
core +1 more source
Acta Crystallographica Section E: Crystallographic Communications, 2015 In the title hydrated salt, C13H10Cl2N3O+·Cl−·3H2O, the organic cation exhibits a dihedral angle of 8.26 (14)° between the mean planes of the pyridinium and benzene rings, and dihedral angles of 8.70 (15) and 15.93 (5)° between the mean planes of the ...
J. Josephine Novina +3 more
doaj +1 more source
Acta Crystallographica Section E, 2014 A new ion-pair complex, (C16H14N)2[Ni(C4N2S2)2] or (1-NaMePy)2[Ni(imnt)2], where 1-NaMePy is 1-(4-naphthylmethylene)pyridinium and imnt is 2,2-dicyanoethene-1,1-dithiolate, was obtained by the direct reaction of NiCl2, K2imnt and (1-NaMePy)+Br− in H2O ...
Miao Zhang, Xu-Jie Xiong
doaj +1 more source
Bright NIR-Emitting Styryl Pyridinium Dyes with Large Stokes’ Shift for Sensing Applications
Biosensors, 2023 Two NIR-emitting donor-π-acceptor (D-π-A) type regioisomeric styryl pyridinium dyes (1a–1b) were synthesized and studied for their photophysical performance and environment sensitivity. The two regioisomers, 1a and 1b, exhibited interesting photophysical
Nirasha I. Wickramasinghe +5 more
doaj +1 more source
Crystal structure of 4-amino-1-(4-methylbenzyl)pyridinium bromide
Acta Crystallographica Section E, 2014 The title molecular salt, C13H15N2+·Br−, crystallized with two independent ion pairs (A and B) in the asymmetric unit. In the cations, the planes of the pyridine and benzene rings are inclined to one another by 79.32 (8) and 82.30 (10)° in ion pairs A ...
N. Sharmila +4 more
doaj +1 more source
Acta Crystallographica Section E: Crystallographic Communications, 2017 The title compound, C21H12Br2F13NO·2CH3OH, was obtained by condensation of 4-methyl-1-(1H,1H,2H,2H-perfluorooctyl)pyridinium iodide and 3,5-dibromo-4-hydroxybenzaldehyde, followed by deprotonation.
Lukas Fliri +5 more
doaj +1 more source
2-Amino-4-methoxy-6-methylpyrimidin-1-ium trifluoroacetate
IUCrData, 2016 In the title molecular salt, C6H10N3O+·C2F3O2−, the pyrimidinium cation is essentially planar, with a maximum deviation of 0.042 (3) Å for all non-H atoms.
Muthaiah Jeevaraj +5 more
doaj +1 more source
ChemEngineering, 2021 Three new uranyl sulfates, [pyH](H3O)[(UO2)3(SO4)4(H2O)2] (1), [pyH]2[(UO2)6(SO4)7(H2O)] (2), and [pyH]2[(UO2)2(SO4)3] (3), were produced upon hydrothermal treatment and successive isothermal evaporation.
Evgeny V. Nazarchuk +2 more
doaj +1 more source
Pyridinium based amphiphilic hydrogelators as potential antibacterial agents
Beilstein Journal of Organic Chemistry, 2010 The numerous applications of hydrogelators have led to rapid expansion of this field. In the present work we report the facile synthesis of amphiphilic hydrogelators having a quaternary pyridinium unit coupled to a hydrophobic long alkyl chain through an
Sayanti Brahmachari +3 more
doaj +1 more source
Molecules, 2023 Heteroarene 1, n-zwitterions are powerful and versatile building blocks in the construction of heterocycles and have received increasing attention in recent years.
Zhen-Hua Wang +5 more
doaj +1 more source