A study of nitrogen- and sulfur-containing heterocycles

The reduction of -cyanoacylurethanes in an aqueous medium in the presence of hydrochlorides of aromatic amines and Raney nickel has given -arylaminoacryloyl-and -alkyl--arylaminoacryloylurethanes which have been converted by heating with 10 % aqueous caustic alkalis into 1-aryl-and 5-alkyl-1-aryluracils.For Communication X, see [1].Translated from Khimiya Geterotsiklicheskikh Soedinenii, Vol. 6, No. 8, pp. 1088–1091, August, 1970.     

Residue integrals and Waring’s formulas for algebraic or even transcendental systems

The present article is focused on the study of a special class of systems of non-linear transcendental equations for which classical algebraic and symbolic methods are inapplicable. For the purpose of study of such systems we develop a method for computing residue integrals with integration over certain cycles. We describe conditions under which the mentioned residue integrals coincide with power sums of the inverses to the roots of a system of equations (i.e. multidimensional Waring’s formulas). Based on this, we develop an algorithm that computes such power sums without computing the roots. As an application of the suggested method, we consider a problem of finding sums of multi-variable number series.     

Luminescent Nanomaterials Doped with Rare Earth Ions and Prospects for Their Biomedical Applications (A Review)

Optics and Spectroscopy - A review of recent advances in the development of luminescent inorganic nanoparticles doped with rare earth ions, which can be used for biomedical applications, is...     

Synthesis and antimicrobial and antinociceptive activity of 4-substituted 2-trichloromethyl-3H-1,5-benzodiazepines

Russian Chemical Bulletin - The reaction of 1-substituted 4,4,4-trichloromethylbutane-1,3-diones with o-phenylenediamine afforded 4-substituted 2-trichloromethyl-3H-1,5-benzodiazepines with...     

Synthesis and X-ray structural study of bis(2-sodiumsulfonylethyl) sulfoxide hexahydrate

The structure of bis(2-sodiumsulfonylethyl) sulfoxide hexahydrate (1), which was synthesized by the reaction of divinyl sulfoxide with sodium metabisulfite in an aqueous ethanol medium, has been determined by X-ray structural analysis. Both Na⁺ cations are coordinated by six O atoms of crystallization water molecules and SO₃ groups; the coordination sphere is a distorted octahedron. The crystals are stabilized by an extensive network of hydrogen bonds through the water molecules of crystallization.