Synthesis of 6-Mercaptohexanoylhydrazones of Mono- and Disaccharides as a Potential Glycoligands of Noble Metal Glyconanoparticles

Russian Journal of General Chemistry - The 1H and 13C NMR spectroscopy was used to study the structure of previously unknown aldose series condensation products (L-fucose, L-rhamnose, D-mannose,...     

Synthesis and structure of (2S,4S)-2-alkyl(aryl)-3-(3-sulfanylpropanoyl)-6-oxohexahydropyrimidine-4-carboxylic acids

Proceeding from natural amino acid L-asparagine and commercially available aldehydes a stereoselective synthesis was developed of (2S,4S)-2-alkyl(aryl)-3-(3-sulfanylpropanoyl)-6-oxohydropyrimidine-4-carboxylic acids, potential antihypertensive drugs, inhibitors of the angiotensin converting enzyme.     

5(3)-Hydroxyisoxazolidin-3(5)-ones and 5-hydroxy-pyrazolidin-3-ones and their ring-chain tautomerism

Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 2, pp. 280–281, February, 1991.     

Structure of the Condensation Products of D-Lactose and D-Maltose with SH-Contaning Carboxylic Acid Hydrazides

Russian Journal of General Chemistry - The structure of the condensation products of D-lactose and D-maltose with sulfanylacetic, 3-sulfanylpropanoic, and 2-sulfanylbenzoic acid hydrazides has been...     

On the Boundedness of a Recurrence Sequence in a Banach Space

We investigate the problem of the boundedness of the following recurrence sequence in a Banach space B: where |y _n} and | _n } are sequences bounded in B, and A _k, k 1, are linear bounded operators. We prove that if, for any > 0, the condition is satisfied, then the sequence |x _n} is bounded for arbitrary bounded sequences |y _n} and | _n } if and only if the operator has the continuous inverse for every z C, |z| 1.     

On Bounded Solutions of Some Classes of Two-Parameter Difference Equations in a Banach Space

We obtain criteria for the existence of bounded solutions of some classes of linear two-parameter difference equations with operator coefficients in a Banach space.     

Synthesis of 3-Thiopropionyl Derivatives of 1,3,4-Benzothiadiazepine as Potential Vasopeptidase Inhibitors

Russian Journal of General Chemistry - A method of synthesis of 3-thiopropinyl derivatives of 5-oxo-1,3,4-benzothiadiazepine-4-acetic acid, potential antihypertensive drugs, vasopeptidase...     

Structure of aldose condensation products with 2-hydroxyand 2-sulfanylbenzohydrazides

The structure of the condensation products of 2-hydroxy- and 2-sulfanylbenzohydrazides with a series of aldoses (L-arabinose, D-ribose, L-ramnose, D-galactose, D-glucose, D-mannose) was studied by ¹H and ¹³C NMR spectroscopy. The condensation products of monosaccharides with 2-hydroxybenzohydrazide in DMSO-d ₆ solution exist as equilibrium mixtures of linear hydrazone and cyclic pyranose and furanose forms, the cyclic tautomers being represented by two stereoisomers (α- and β-anomers). The aldose condensation products with 2-sulfanylbenzohydrazide in the crystalline state have cyclic 1,3,4-benzothiadiazepine structure, while in DMSO-d ₆ solution they undergo complete or partial isomerization into cyclic pyranose tautomer.     

The Role of Catalyst Formation–Deactivation Processes and Evidence for a Nonlinear Mechanism in the Mizoroki–Heck Reaction with Aryl Chlorides

Kinetics and Catalysis - An operando kinetic study was made of the Mizoroki–Heck reaction with low-reactive aryl chlorides using the most practically attractive “ligand-free”...