Oxidative cross-coupling of secondary phosphine chalcogenides with amino alcohols and aminophenols: aspects of the reaction chemoselectivity
作者:Kseniya O. Khrapova、Anton A. Telezhkin、Pavel A. Volkov、Lyudmila I. Larina、Dmitry V. Pavlov、Nina K. Gusarova、Boris A. Trofimov
DOI:10.1039/d1ob00287b
日期:——
temperature, molar ratio of the initial reagents 1 : 1) in a CCl4/Et3N oxidizing system to chemoselectively deliver amides of chalcogenophosphinic acids with free OH groups. Under similar conditions, mono-cross-coupling between secondary phosphine chalcogenides and 1,2- or 1,3-aminophenols proceeds only with the participation of phenolic hydroxyl to give aminophenylchalcogenophosphinic O-esters. The yields
Chemoselective Reactions of Secondary Phosphine Chalcogenides with Vinyloxyalkylamines: Synthesis of a Novel Family of Functional Phosphinoсhalcogenоic Amides
Abstract The reactions of secondary phosphine сhalcogenides with vinyloxyalkylamines proceed chemoselectively in triethylamine–carbon tetrachloride under mild conditions to give the corresponding phosphinoсhalcogenоic amides bearing vinyloxy moieties in 78–95% yields. The reactions of secondary phosphine сhalcogenides with vinyloxyalkylamines proceed chemoselectively in triethylamine–carbon tetrachloride
Synthesis of oxazolidinylphosphine chalcogenides from aminoethyl vinyl ethers
作者:P. A. Volkov、N. I. Ivanova、N. K. Gusarova、L. A. Oparina、L. I. Larina、O. V. Vysotskaya、N. A. Kolyvanov、I. Yu. Bagryanskaya、B. A. Trofimov
DOI:10.1007/s11172-013-0015-3
日期:2013.1
N-(2-Vinyloxyethyl)phosphinothioamides and -phosphinoselenoamides prepared by oxidative cross-coupling of 2-vinyloxyethylamine with secondary phosphine chalcogenides undergo thermal (75–100 °C) cyclization into the corresponding 3-(diorganylchalcogenophosphoryl)-2-methyl-1,3-oxazolidines in 80–90% yields.
A three-component reaction of secondary phosphine selenides R2P(Se)H [R = PhCH2CH2, PhCH(Me)CH2, 4-t-BuC6H4CH2CH2, (2-methyl-5-pyridyl)CH2CH2, Ph], elemental selenium, and primary, secondary, and tertiary amines and diamines proceeds under mild conditions (25-85 ˚C, 1-90 min) in tetrahydrofuran-ethanol as medium to give previously unknown mono-, di-, and triorganoammonium salts of diorganodiselenophosphinates
Metal-free site selective cross-coupling of pyridines with secondary phosphine chalcogenides using acylacetylenes as oxidants
作者:Boris A. Trofimov、Pavel A. Volkov、Kseniya O. Khrapova、Anton A. Telezhkin、Nina I. Ivanova、Alexander I. Albanov、Nina K. Gusarova、Oleg N. Chupakhin
DOI:10.1039/c8cc01155a
日期:——
Pyridines undergo site selective cross-coupling with secondary phosphine chalcogenides (oxides, sulfides, and selenides) in the presence of acylphenylacetylenes under metal-free mild conditions (70–75 °C, MeCN) to afford 4-chalcogenophosphoryl pyridines in up to 71% yield. In this new type of SNHAr reaction acylacetylenes act as oxidants, being stereoselectively reduced to the corresponding olefins