In the asymmetric unit of the title mol-ecular salt, C6H9N2 (+)·C2Cl3O2 (-), there are two independent 2-amino-6-methyl-pyridinium cations and two independent tri-chloro-acetate anions. The pyridine N atom of the 2-amino-6-methyl-pyridine mol-ecule is protonated and the geometries of these cations reveal amine-imine tautomerism. Both protonated 2-amino-6-methyl-pyridinium cations are essentiall...

The pyridine rings of the title compound, C(18)H(23)N(3), are in a nearly perpendicular orientation relative to the plane defined by the three amino-bonded C atoms, making dihedral angles of 87.4 (1) ° and 84.2 (1) °. One of the pyridine N atoms acts as an hydrogen-bond acceptor for two pyridine C-H groups. By means of these intermolecular hydrogen bonds, the mol-ecules form a two-dimensional n...

Heterocyclic amines (HCAs) that are present in cooked foods require metabolic activation to exert their genotoxicity. They undergo activation via N-hydroxylation by cytochrome P450 1A2 (CYP1A2), followed by O-esterification by O-acetyltransferase (OAT). To develop a Salmonella tester strain that is highly sensitive to mutagenic HCAs, we introduced a coexpression plasmid (p1A2OR) carrying human ...

In the title hydrate, C9H12N4S·H2O (systematic name: 3-methyl-1-{(E)-[(3-methyl-pyridin-2-yl)methyl-idene]amino}-thio-urea monohydrate), a small twist is noted between the pyridine ring and the rest of the organic mol-ecule [dihedral angle = 6.96 (5)°]. The imine and pyridine N atoms are syn, and the amine H atoms are anti. The latter arrangement allows for the formation of an intra-molecular N...

objective(s):involvement of tyrosinase in the synthesis of melanin and cell signaling pathway has made it an attractive target in the search for therapeutic inhibitors for treatment of different skin hyperpigmentation disorders and melanoma cancers. materials and methods: in the present study, we conducted a comprehensive kinetic analysis to understand the mechanisms of inhibition imposed by 2-...

In the title compound, C(14)H(10)N(2)O, the dihedral angle between the imidazo[1,2-a]pyridine and phenyl rings is 28.61 (4)° The mol-ecules are connected into broad chains parallel to the a axis by weak C-H⋯O and C-H⋯N hydrogen bonds. The linking of the ribbons is provided by π-π stacking inter-actions between neighbouring pyridine rings, with a centroid-centroid distance of 3.7187 (7) Å.

The title compound, C(14)H(12)F(3)NOS, was synthesized by the reaction of 2-chloro-3-(2,2,2-trifluoro-eth-oxy)pyridine and phenyl-methane-thiol. The dihedral angle between the aromatic rings is 76.7 (2)°. In the crystal structure, weak aromatic π-π stacking between inversion-related pairs of pyridine rings [centroid-to-centroid separation = 3.776 (2) Å] may help to establish the packing.

In this study, we characterized a muscarinic acetylcholine receptor (mAChR) potentiator, LY2119620 (3-amino-5-chloro-Ncyclopropyl-4-methyl-6-[2-(4-methylpiperazin-1-yl)-2-oxoethoxy] thieno[2,3-b]pyridine-2-carboxamide) as a novel probe of the humanM2 and M4 allosteric binding sites. Since the discovery of allosteric binding sites on G protein–coupled receptors, compounds targeting these novel s...

The title mol-ecular salt, C5H6N3O2 (+) ·H2NO3S(-), was obtained from the reaction of sulfamic acid with 2-amino-5-nitro-pyridine. A proton transfer from sulfamic acid to the pyridine N atom occurred, resulting in the formation of a salt. As expected, this protonation leads to the widening of the C-N-C angle of the pyridine ring, to 122.9 (3)°, with the pyridinium ring being essentially planar ...