Results 11 to 20 of about 14,921 (209)
4-{(1E,3E)-4-[4-(Dimethylamino)phenyl]buta-1,3-dien-1-yl}-1-methylpyridin-1-ium iodide
IUCrData, 2016 The title molecular salt, C18H21N2+·I−, consists of a pyridinium cation and an I− anion. The cation exists in an E,E conformation with respect to the two C=C double bonds, and is roughly planar with the pyridinium ring being inclined to the benzene ring ...
S. John Sundaram +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 +4 more
doaj +1 more source
Angewandte Chemie, EarlyView.We introduce a novel chemical derivatisation strategy for the UV‐activated detection of elusive metabolites. Incorporation of a tocopherol‐active chromophore allows for the detection of tagged analytes as photoionised radical cations, selectively induced by a 266 nm laser.
Sofia R. McGowan +5 more
wiley +2 more sources
2-[(Pyridin-2-yl)amino]pyridinium 2,4,6-trinitrophenolate
Acta Crystallographica Section E, 2014 In the cation of the title salt, C10H10N3+·C6H2N3O7−, the pyridine and pyridinium rings are linked by an intramolecular N—H...N hydrogen bond and are approximately coplanar, with a dihedral angle between their planes of 4.24 (6)°.
Kateryna A. Ohui +2 more
doaj +1 more source
Asymmetric Hydrogenation of 3‐Substituted Pyridinium Salts
Chemistry – A European Journal, 2016 AbstractThe use of an equivalent amount of an organic base leads to high enantiomeric excess in the asymmetric hydrogenation of N‐benzylated 3‐substituted pyridinium salts into the corresponding piperidines. Indeed, in the presence of Et3N, a Rh‐JosiPhos catalyst reduced a range of pyridinium salts with ee values up to 90 %.
M. Renom-Carrasco +6 more
openaire +4 more sources
4,4′-(o-Phenylenedioxydimethylene)dipyridinium dinitrate
Acta Crystallographica Section E, 2009 The cation of the salt, C18H18N2O22+·2NO3−, lies about a twofold rotation axis. The pyridinium ring is almost coplanar with the phenylene ring [dihedral angle between rings = 5.69 (9)°].
Ping Zou +4 more
doaj +1 more source
Pyridinium-catalyzed decarboxylative borylation of benzoyl peroxides
Green Synthesis and Catalysis, 2021 A pyridinium salt catalyzed radical borylation of benzoyl peroxides is reported herein. A range of benzoyl peroxides having different electronic properties were well compatible in this borylation reaction, delivering various arylboronates in good yields ...
Shuxian Zhu +4 more
doaj +1 more source
Synthesis of a New Bioconjugate Steroid Pyridinium Salt Derived from Allopregnanolone Acetate
MolbankBecause allopregnanolone and derivatives represent biologically active molecules, in this letter, we present the synthesis of a new bioconjugate steroid pyridinium salt derived from allopregnanolone in three steps.
Hisami Rodríguez-Matsui +5 more
doaj +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
Tandem dinucleophilic cyclization of cyclohexane-1,3-diones with pyridinium salts
Beilstein Journal of Organic Chemistry, 2013 The cyclization of cyclohexane-1,3-diones with various substituted pyridinium salts afforded functionalized 8-oxa-10-aza-tricyclo[7.3.1.02,7]trideca-2(7),11-dienes.
Mostafa Kiamehr +7 more
doaj +1 more source