Results 11 to 20 of about 732,397 (247)

Synthesis and biological activity study of tanshinone I-pyridinium salt derivatives [PDF]

Natural Products and Bioprospecting
Natural product tanshinone I exhibits weak potency and poor drug-like properties, which have restricted its clinical development as an anticancer agent.
Huimin Zhao, Yuyang Wang, Zining Liu, Lin Lin, Jiasi Xiang, Zihao Zhu, Xiongli Yang, Yongsheng Fang, Lingmei Kong, Yan Li   +9 more
doaj   +2 more sources

Quaternary pyridinium salts: a review.

Journal of Oleo Science, 2008
Cationic surfactants are being used in various applications industrially and domestically for a long time. Pyridinium salts come under the category of cationic surfactants. These are unsaturated heterocyclic compounds having different functional groups present either on pyridine ring or at nitrogen atom.
Madaan, Parag, Tyagi, Vinod K.
exaly   +4 more sources

Preparation of the Pyridinium Salts Differing in the Length of the N-Alkyl Substituent

Molecules, 2010
Quaternary pyridinium salts with chains ranging from C8 to C20 belong in the large group of cationic surfactants. In this paper, the preparation of such cationic surface active agents based on the pyridinium moiety and differing in the length of the N ...
Kamil Musilek, Jan Korabecny, Miroslav Pohanka, Ondrej Soukup, Jiri Cabal, Petr Stodulka, Jan Marek, Kamil Kuca   +7 more
doaj   +3 more sources

2-(1-Methoxycarbonyl-2-phenyleth-1-yl)-1-benzylpyridin-1-ium Bromide

Molbank, 2023
In this work, we report the unexpected conversion of a pyridine derivative into the corresponding N-benzylated pyridinium salt due to the presence of unreacted benzyl bromide in the crude product. This transformation was observed at room temperature in a
Lorenzo Suigo, Valentina Straniero, Ermanno Valoti   +2 more
doaj   +1 more source

Catalytic response and molecular simulation studies in the development of synthetic routes in trimeric triaryl pyridinium type ionic liquids

Scientific Reports, 2023
Under conventional and silica-supported Muffle furnace methods, water-soluble substituted trimeric triaryl pyridinium cations with various inorganic counter anions are synthesized.
Ramalingam Tamilarasan, Annadurai Subramani, G. Sasikumar, Pandurangan Ganapathi, S. Karthikeyan, Sasikumar Ponnusamy, Salim Albukhaty, Mustafa K. A. Mohammed, Zaidon T. Al-aqbi, Faris A. J. Al-Doghachi, Duha S. Ahmed, Yun Hin Taufiq-Yap   +11 more
doaj   +1 more source

Pyridinium Salts of Dehydrated Lanthanide Polychlorides

Molecules, 2022
The reaction of lanthanide (Ln) chloride hydrates ([Ln(H2O)n(Cl)3]) with pyridine (py) yielded a set of dehydrated pyridinium (py-H) Ln-polychloride salts. These species were crystallographically characterized as [[py-H-py][py-H]2[LnCl6]] (Ln-6; Ln = La, Ce, Pr, Nd, Sm, Eu, Gd) or [[py-H]2[LnCl5(py)]] ((Ln-5; Ln = Tb, Dy, Ho, Er, Tm, Yb, Lu).
Roger E. Cramer, Esteban M. Baca, Timothy J. Boyle   +2 more
openaire   +3 more sources

On the photochemical reaction of pyridinium salts with nucleophiles [PDF]

Photochemical & Photobiological Sciences, 2021
AbstractDFT calculations on the photochemical reaction of 1-n–N-butylpyridinium salt in water with hydroxide anion is in agreement with a singlet state process where the S2 state at λ = 253 nm can be converted into a Dewar isomer (2-butyl-2-azabicyclo[2.2.0]hexa-2,5-dien-2-yl cation).
openaire   +4 more sources

Pyridinium-2-carboxyl­ate–benzene-1,2-diol (1/1) [PDF]

, 2009
The title compound, C6H5NO2·C6H6O2, crystallizes with one pyridinium-2-carboxyl­ate zwitterion and one mol­ecule of benzene-1,2-diol in the asymmetric unit.
Bolte, Michael, Michael Bolte, Cuong, Ton Quoc, Cuong Quoc Ton   +3 more
core   +1 more source

Investigation of the Pyridinium Ylide—Alkyne Cycloaddition as a Fluorogenic Coupling Reaction

Molecules, 2016
The cycloaddition of pyridinium ylides with alkynes was investigated under mild conditions. A series of 13 pyridinium salts was prepared by alkylation of 4-substituted pyridines.
Simon Bonte, Ioana Otilia Ghinea, Rodica Dinica, Isabelle Baussanne, Martine Demeunynck   +4 more
doaj   +1 more source

4-[3-(Isonicotino-yloxy)propoxycarbon-yl]pyridinium diiodidoargentate(I) [PDF]

, 2011
The structure of the title compound, (C15H15N2O4)[AgI2], consists of an organic 4-[3-(isonicotino­yloxy)propoxycarbon­yl]pyridinium cation which has a gauche–gauche (O/C/C/C—O/C/C/C or GG’) conformation and lies on a twofold rotation axis, which passes ...
Bolte, Michael, Iván Brito, López-Rodríguez, Matías, Brito, Iván, Alejandro Cárdenas, Michael Bolte, Vallejos, Javier, Cárdenas, Alejandro, Matías López-Rodríguez, Alejandro Cárdenas, Iván Brito, Javier Vallejos, Matías López-Rodríguez   +12 more
core   +1 more source