A spectrophotometric study of osmium (VIII) complex of 1-hydroxy 2- pyridine thione (HPT) is presented. A red-violet complex, 0 s (HPT) is formed in a highly acidic solution, and shows maximum absorbance at 500 nm with molar absorptivity of 5.12 x 101. mol . cm . Beer's law is obeyed in the range of 3-60 ppm. Sandel's sensitivity of the method is 0.37 ?g.cm per0.001 ab sorbance unit. V (V)...

α-Hydroxy ketones are valuable synthons in organic chemistry. Here we show that oxidation of vic-diols to α-hydroxy ketones with H2O2 can be achieved with an in situ prepared catalyst based on manganese salts and pyridine-2-carboxylic acid. Furthermore the same catalyst is effective in alkene epoxidation, and it is shown that alkene oxidation with the MnII catalyst and H2O2 followed by Lewis ac...

In the title compound, [Ag(C(13)H(11)N(3)O(2))(2)(H(2)O)]NO(3), two N atoms from two pyridine rings of two N'-(2-hydroxy-benzyl-idene)isonicotinohydrazide ligands coordinate to the Ag(I) atom, forming a nearly linear geometry with an N-Ag-N angle of 171.63 (6)°; a water O atom is located at the apical site, completing the T-shaped coordination. The crystal structure is stabilized by extensive O...

The title compound {systematic name: 9,10-didehydro-N-[1-(hydroxy-meth-yl)prop-yl]-d-lysergamide maleate}, C(20)H(26)N(3)O(2) (+)·C(4)H(3)O(4) (-), contains a large rigid ergolene group. This group consists of an indole plane connected to a six-membered carbon ring adopting an envelope conformation and N-methyl-tetra-hydro-pyridine where the methyl group is in an equatorial position. In the cry...

Herein, three novel cocrystals of 1-hydroxy-2-naphthoic acid: tetramethylpyrazine, acid:1,10-phenanthroline, and acid:1,4-bis(imidazol-1-ylmethyl)benzene (L2) were obtained by crystallization in methanol–water mixed solvent via a slow evaporation method. The cocrystalline products 1−3 carried out range techniques, including single-crystal X-ray diffraction, Fourier transform–infrared spectrosco...

Derivatives of pyridine-4-one are iron chelators with various biological activities including antifungal, anti-malarial, antiviral, anti-inflammatory and analgesic activities. This study was aimed to evaluate the analgesic effect of four new derivatives of 3-hydroxy pyridine-4-one in animal models. Acetic acid-induced writhing and formalin tests were used to assess the analgesic activity in mal...

Nicotine, the main alkaloid produced by Nicotiana tabacum and other Solanaceae, is very toxic and may be a leading toxicant causing preventable disease and death, with the rise in global tobacco consumption. Several different microbial pathways of nicotine metabolism have been reported: Arthrobacter uses the pyridine pathway, and Pseudomonas, like mammals, uses the pyrrolidine pathway. We ident...