Alexander V. Artem’ev

Diselenophosphinates. Synthesis and Applications

The last few years have seen a considerable expansion in research on the chemistry of diselenophosphinates (salts and esters of diselenophosphinic acids) due to the use of these compounds as effici...

Luminescent CuI thiocyanate complexes based on tris(2-pyridyl)phosphine and its oxide: from mono-, di- and trinuclear species to coordination polymers

Tris(2-pyridyl)phosphine oxide reacts with CuSCN to form a variety of luminescent complexes, depending on the specified metal-to-ligand ratio and the solvent used, viz. mononuclear [Cu(N,N′,N′′-Py3PO)(NCS)], dinuclear (N,N′-Py3PO)Cu(SCNNCS)Cu[(N,N′-Py3PO)], their co-crystal (2:1, correspondingly) and trinuclear {Cu(NCS)[SCNCu(N,N′,N′′-Py3PO)]2}. In the solid state, these complexes feature red-orange emission upon UV photoexcitation. The reaction of tris(2-pyridyl)phosphine with CuSCN quantitatively produces an almost insoluble coordination polymer, [Cu(Py3P)NCS]n, which exhibits bright green emission. The synthesized compounds are the first members of the hitherto unknown family of Cu(I) thiocyanate complexes supported by tripodal ligands.

Reaction of Red Phosphorus with Allylbenzene in Superbasic System KOH-DMSO

Abstract Red phosphorus reacts with allylbenzene in the superbase system KOH-DMSO (130°C, 3 h, Ar) to give a mixture of bis(1-methyl-2-phenylethyl)phosphane (1), bis(1-methyl-2-phenylethyl)phosphane oxide (2), and 1-methyl-2-phenylethylphosphinic acid (3). Secondary phosphane oxide 2 and phosphinic acid 3 have been isolated from this mixture in 35% and 32% yield, respectively. Microwave activation of the reaction (200 W, 30 min) affords secondary phosphane 1 as the main product in 48% yield. GRAPHICAL ABSTRACT

Reaction of Red Phosphorus with 4-Methoxystyrene in KOH-DMSO System: One-Pot Synthesis of Tris[2-(4-methoxyphenyl)ethyl]phosphane Oxide

Abstract Red phosphorus reacts with 4-methoxystyrene in the KOH-DMSO superbase system (130 °C, 3 h, Ar) in the presence of a small quantity of H2O to give tris[2-(4-methoxyphenyl)ethyl]phosphane oxide as the main product in 30% yield. Microwave activation of the reaction (600 W, 6 min) affords basically a mixture of the phosphane oxide and tris[2-(4-methoxyphenyl)ethyl]phosphane (in a ratio of 1:1). When the mixture is exposed to air (r.t., 24 h), the phosphane oxide is formed in 85% yield. GRAPHICAL ABSTRACT

Aerobic addition of secondary phosphine oxides to vinyl sulfides: a shortcut to 1-hydroxy-2-(organosulfanyl)ethyl(diorganyl)phosphine oxides

Summary Secondary phosphine oxides react with vinyl sulfides (both alkyl- and aryl-substituted sulfides) under aerobic and solvent-free conditions (80 °C, air, 7–30 h) to afford 1-hydroxy-2-(organosulfanyl)ethyl(diorganyl)phosphine oxides in 70–93% yields.

Efficient Synthesis of Lupininium, Anabasinium and Quininium Thioselenophosphinates via a Multi-component Reaction between Secondary Phosphines, Sulfur, Selenium and Alkaloids

Efficient Synthesis of Lupininium, Anabasinium and Quininium Thioselenophosphinates via a Multicomponent Reaction between Secondary Phosphines, Sulfur, Selenium and Alkaloids Alexander V. Artem’ev a , Nina K. Gusarova a , Svetlana F. Malysheva a , Yuriy V. Gatilov b & Victor I. Mamatyuk b a A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, Irkutsk, Russian Federation b N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russian Federation

The Direct Phosphorylation Of 2-, 3-, and 4-Methylstyrenes and 2,4,6-Trimethylstyrene with Elemental Phosphorus VIA Trofimov–Gusarova Reaction

GRAPHICAL ABSTRACT Abstract 3- and 4-Methylstyrenes react with red phosphorus in the superbase system KOH/DMSO (110 °C, 2 h) to afford tertiary phosphine oxides in 20–25% total yield. Under microwave irradiation (600 W) this reaction proceeds for 5 min giving in the case of 2-, 3-, and 4-methylstyrenes mixtures of tris[2-(methylphenyl)ethyl]phosphines and their oxides. Subsequent treatment of these products with H2O2 (acetone/H2O, r.t., 5 min) allowed the phosphine oxides to be isolated in 45–68% yields. 2,4,6-Trimethylstyrene reacts with red phosphorus (KOH/DMSO 600 W, 5 min) in a similar manner to furnish tris[2-(2,4,6-trimethylphenyl)ethyl]-phosphine oxide (40% yield) along with 2-(2,4,6-trimethylphenyl)ethylphosphinic acid (21% yield).

New Model Distances and Uncertainty Measures for Multivalued Logic

There is an increasing importance of problems regarding the analysis of propositions of experts and clustering of information contained in databases. Propositions of experts can be presented as formulas of n-valued logic \(L_{n}\). This paper is concerned with defining metrics and degrees of uncertainty on formulas of n-valued logic. After metrics and degrees of uncertainty (as well as their useful properties) have been established, they are used for the cluster analysis of the sets of n-valued formulas. Various clustering algorithms are performed and obtained results are analyzed. Established methods can be further employed for experts propositions analysis, clustering problems and pattern recognition.

Hydroalkoxylation of alkynes by a nitroxyl containing alcohol, 4-hydroxy-2,2,6,6-tetramethylpiperidin-1-oxyl: synthesis of spin-labeled enol ethers

A series of spin-labeled enol ethers has been synthesized in 53–67% yields by superbasecatalyzed (KOH/DMSO suspension as a catalyst) hydroalkoxylation of alkynes (acetylene, phenylacetylene, 4-tert-butylphenylacetylene and 3-ethynylpyridine) by 4-hydroxy-2,2,6,6tetramethylpiperidin-1-oxyl (4-hydroxy-TEMPO) under mild conditions (70–80 °C, 1.5–2 h). With unsubstituted acetylene, the hydroalkoxylation readily occurs at atmospheric pressure, yield of the corresponding vinyl ether being 53%.