We synthesized a new [2]catenane composed of a pillar[5]arene ring and a pyridinium derivative using ring-closing metathesis.

Pseudorotaxane formed by reacting beta-cyclodextrin bearing a phenylboronic acid residue with 1-heptyl-4-(4'-dimethylaminostyryl)pyridinium functioned as a novel fluorescent saccharide receptor having unique responses.

Pseudorotaxanes from self-assembly of two crown ether-based cryptand wheels and a 1,2-bis(pyridinium) ethane derivative axle were prepared.

2-(5,6-diphenyl-1,2,4-triazin-3-yl)pyridinium dichloroiodate (I) (1) was synthesized by reacting 3-(2-pyridyl)-5,6-diphenyl-1,2,4-triazine with ICl in dichloromethane solution. The structural characterization of 1 SC-XRD analysis accompanied elemental analysis, FT-IR, and FT-Raman spectroscopy measurements.

A regioselective Suzuki–Miyaura cross-coupling reaction on 3 0,5 0-dibromo pyridinium N-(2 0-azinyl)aminides is reported. A series of 3 0-aryl(or heteroaryl)-5 0-bromo-pyridinium N-(2 0-pirazinyl)aminides were obtained in good yields. Two isomeric 3 0,5 0diaryl pyridinium N-(2 0-azinyl)aminides were also prepared. 2006 Elsevier Ltd. All rights reserved. Functionalization of heterocycles through...

To quantify osseous breakdown in multiple myeloma (MM), monoclonal gammopathy of undetermined significance (MGUS), and benign osteoporosis, we measured urinary levels of pyridinium cross-links of collagen in 50 patients with newly diagnosed and untreated MM, 40 patients with MGUS, 40 untreated patients with osteoporotic vertebral fractures, and 64 healthy adults. Ion-paired, reverse-phase high-...

The title compound, (C15H14N3)[NiCl4]Cl, comprises an NiII cation tetra-hedrally coordinated by four chloride anions, a non-coordinating chloride anion and an essentially planar terpyridinium trication (tpyH33+), in which the central pyridinium ring forms dihedral angles of 5.7 (2) and 6.0 (2)° with the peripheral pyridinium rings. Three inter-species N-H⋯Cl hydrogen bonds are formed with the C...

The present work reports an efficient synthesis of fluorinated pyridinium salts-based hydrazones under both conventional and eco-friendly ultrasound procedures. The synthetic approach first involves the preparation of halogenated pyridinium salts through the condensation of isonicotinic acid hydrazide (1) with p-fluorobenzaldehyde (2) followed by the nucleophilic alkylation of the resulting N-(...

A glycyrrhetate-containing amphiphile, MGP (1-[2-(methyl glycyrrhetate)-2-oxoethyl]pyridinium bromide), has been synthesized, and found to assemble into supramolecular helical nanofibers in chloroform/aromatic solvents, which are primarily driven by π-π stacking, van der Waals forces, and hydrophobic interactions. During the assembly process, MGP stacked into J-aggregates resulting in the seque...

Two 3D coordination polymers of Mn(II) with azide and bifunctional zwitterionic ligands bearing both carboxylate and tetrazolate groups, 1-(carboxylatomethyl)-3-(5-tetrazolato)pyridinium (L(1)) and 1-(carboxylatoethyl)-4-(5-tetrazolato)pyridinium (L(2)), were synthesized, and structurally and magnetically characterized. They are formulated as [Mn(3)(L(1))(2)(N(3))(4)(H(2)O)(2)](n)·4nH(2)O (1) a...