Pyridinium Salts of Dehydrated Lanthanide Polychlorides [PDF]
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,
Roger E. Cramer +2 more
doaj +4 more sources
Regioselective and site-divergent synthesis of tetrahydropyridines by controlled reductive-oxidative dearomative hydroarylation of pyridinium salts [PDF]
Nature CommunicationsTetrahydropyridine skeletons serve as ubiquitous structural motifs which are predominant in natural products, bioactive and drug molecules. Thus, the development of efficient and general synthetic methods for the synthesis of tetrahydropyridine ...
Xing-Fu Wei +4 more
doaj +2 more sources
Antitumour Effects of Selected Pyridinium Salts on Sensitive Leukaemia HL60 Cells and Their Multidrug Resistant Topoisomerase II-Defective HL60/MX2 Counterparts [PDF]
Molecules, 2022 Multidrug resistance (MDR), having a multifactorial nature, is one of the major clinical problems causing the failure of anticancer therapy. The aim of this study was to examine the antitumour effects of selected pyridinium salts, 1-methyl-3 ...
Jolanta Tarasiuk +2 more
doaj +2 more sources
Synthesis, Characterization, and Computational Modeling of N-(1-Ethoxyvinyl)pyridinium Triflates, an Unusual Class of Pyridinium Salts [PDF]
Molecules, 2018 N-Substituted pyridinium salts constitute one of the most valuable reagent classes in organic synthesis, due to their versatility and ease of use. Herein we report a preliminary synthesis and detailed structural analysis of several N-(1-ethoxyvinyl ...
Jonathan D. Shapiro +8 more
doaj +2 more sources
A metal-free approach for the synthesis of amides/esters with pyridinium salts of phenacyl bromides via oxidative C–C bond cleavage [PDF]
Beilstein Journal of Organic Chemistry, 2019 An efficient, simple, and metal-free synthetic approach for the N- and O-benzoylation of various amines/benzyl alcohols with pyridinium salts of phenacyl bromides is demonstrated to generate the corresponding amides and esters.
Kesari Lakshmi Manasa +3 more
doaj +2 more sources
One‐Step Aqueous Synthesis of Glycosyl Pyridinium Salts, Electrochemical Study, and Assessment of Utility as Precursors of Glycosyl Radicals Using Photoredox Catalysis [PDF]
ChemistryOpenA single step method for the production of unprotected glycosyl pyridinium salts has been developed involving treatment of the unprotected sugar with a pyridine, triethylamine, and either 2‐chloro‐1,3‐dimethylimidazolinium chloride (DMC) or 2‐chloro‐1,3 ...
Daniel Chong +2 more
doaj +2 more sources
Preparation and Characterization of Polyphenol-Functionalized Chitooligosaccharide Pyridinium Salts with Antioxidant Activity [PDF]
Marine DrugsAs a kind of eco-friendly material with wide application prospects, chitooligosaccharide (COS) has attracted increasing attention because of its unique bioactivities.
Zhen Qi +3 more
doaj +2 more sources
One-Pot Phosphate-Mediated Synthesis of Novel 1,3,5-Trisubstituted Pyridinium Salts: A New Family of S. aureus Inhibitors. [PDF]
Molecules, 2017 Polysubstituted pyridinium salts are valuable pharmacophores found in many biologically active molecules. Their synthesis typically involves the use of multistep procedures or harsh reaction conditions.
Pesnot T +4 more
europepmc +3 more sources
Electron-deficient pyridinium salts/thiourea cooperative catalyzed O-glycosylation via activation of O-glycosyl trichloroacetimidate donors [PDF]
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 +2 more sources
A universal O-glycosylation platform enabled by pyridinium catalysis using gas-releasing oxazolidinone-based carbamates donors [PDF]
Nature CommunicationsChemical glycosylation facilitates the scalable synthesis of structurally well-defined carbohydrates for functional studies and therapeutic development, with progress being driven by donors and strategies.
Xiaoting Qin +9 more
doaj +2 more sources