Reaction of Vinylpyridines with Active Modifications of Elemental Phosphorus in KOH/DMSO

The phosphorylation of 2-vinyl- and 4-vinylpyridines by white phosphorus and active modifications of red phosphorus (obtained by thermal polymerization of white phosphorus in the presence of graphite or the action of ionizing radiation in benzene) in the KOH/DMSO superbase system at room temperature leads to the formation of tris[2-(2-pyridyl)ethyl]- and tris[2-(4-pyridyl)ethyl]phosphine oxides in 58-72% yield. These oxides are promising ligands for design of metal complex catalysts. These vinylpyridines react less efficiently with ordinary red phosphorus and the yield of the corresponding tris(2-pyridylethyl)phosphine oxides does not exceed 10%.     

Phosphorylation of alkyl methanesulfonates with elemental phosphorus in a strongly basic medium: Synthesis of alkylphosphinic acids

Russian Journal of General Chemistry - Alkyl methanesulfonates were for the first time introduced in the reaction of direct phosphorylation of electrophiles with elemental phosphorus in strongly...     

Chemoselective Vinylation of the Quinine Hydroxy Group with the System Electron-Deficient Acetylene/Diphenylphosphine Oxide: an Alternative to SNHAr Reaction

Russian Journal of Organic Chemistry - Three-component SNHAr reaction of quinine, diphenylphosphine oxide, and furoylacetylene chemoselectively afforded the corresponding quinine vinyl ether and 2:...     

Features of Forming a Structure of the Copper-Zinc Alloy Coating on the Aluminum Alloy Surface by Friction Stir Processing

Russian Physics Journal - The structure of samples of the C27400 copper alloy coatings on the AA5056 aluminum alloy surface, produced by friction stir processing of a rolled sheet package is...     

Catalyst-free regio- and chemoselective addition of secondary phosphine oxides to isoquinolines

Russian Chemical Bulletin - Isoquinolines react with secondary phosphine oxides without catalyst (70–75 °C, 10–15 h, without solvent or in MeCN) to chemo- and regioselectively form...     

Multipactor Discharge in Single-Gap Bunchers at 80 MHz

Physics of Atomic Nuclei - The results of calculating the threshold voltage levels causing multipactor discharge in single-gap buncher cavities at 80 MHz are presented in the article. Two types of...     

Reaction of Secondary Phosphine Oxides with Aromatic Aldehydes

Nucleophilic addition of secondary phosphine oxides to aromatic aldehydes proceeds under mild conditions (20-60°C, 10-40 h) and provides [bis(2-organylethyl)](arylhydroxymethyl)phosphine oxides in high yields.