K. M. Enikeev

The aggregartion and catalytic activity of amphiphilic calix[4]resorcinolarenes and phenols in hydrolysis of phosphonous esters in water-dimethylformamide media

The amphiphilic calix[4]resorcinolarenes, aminomethylated calix[4]resorcinolarenes, o-aminomethylphenols, and their quaternary derivatives in water—dimethylformamide media (10—75 vol.% DMF) form aggregates, which catalyze the hydrolysis of phosphonous esters. The ability to self-association and the catalytic activity of the aggregates depend on the hydrophobicity of the amphiphilic compound, the pH of solution, and the content of DMF.

Protolytic properties and reactivity of aminomethylated calix[4]resorcarenes in reactions with esters of phosphorus acids

The acid-base properties and the kinetics of reactions of aminomethylated calix[4]resorcarenes (AMC) withp-nitrophenyl esters of phosphorus acids in aqueous solutions of propan-2-ol (80 vol.% PriOH) were studied by potentiometry, UV spectrophotometry, and31P NMR spectroscopy. The effect of the length of the hydrocarbon radical and substituents at the nitrogen atom on the protolytic properties and reactivity of AMC was studied. The reactions studied occur in two stages. At the first stage, phosphorylated AMC are formed, which are hydrolyzed to the corresponding acids at the second stage.

One-Electron Transfer in Electrochemical Oxidation of Calix[4]resorcinolarenes and Their Aminomethylated Derivatives

Calix[4]resorcinolarenes in the presence of amine and aminomethylated calix[5]resorcinolarenes in DMF undergo similar multistage electrochemical oxidation. The first stage proceeds at low potentials and involves reversible one-electron transfer with formation of stable phenoxy radicals.

Catalytic activity of aminomethylated calix[4]resorsinolarene aggregates in hydrolysis of esters of phosphorus acids

The reaction kinetics of aminomethylated calix[4]resorcinolarenes (AMC) withp-nitrophenyl esters of phosphorus acids (EPA) in a water—DMF solution (30 vol.% DMF) was studied by spectrophotometry and31P NMR spectroscopy in the presence and absence of the nonionic surfactant Triton X-100. The AMC form aggregates of micellar and nonmicellar types and are the catalysts for EPA hydrolysis. The catalytic activity of the aggregates depends on their structure, pH of the medium, and the nature of the solvent.

The reaction of 2-aminomethylphenols and their copper(II) complexes with esters of phosphorus acids

Abstract2-Alkyl- and 2-dialkylaminomethylphenols (AMP) with different hydrophobic substituents at the nitrogen atom and their copper(II) complexes (CAMP) react with the esters of phosphorus acids in aqueous solutions of ethanol in two stages: phosphorylated AMP (PAMP) are formed at the first stage and then hydrolyzed to the corresponding acids. The reactivity of AMP and PAMP significantly decreases when the hydrophobicity and steric hindrances of substituents at the nitrogen atom increase. An inverse dependence was found for CAMP.

O-Complexes of 1,3,2,5-dioxaboraphosphorinanes with copper(I) and silver(I) salts

Abstract1,3,2,5-Dioxaboraphosphorinanes interact stereospecifically with Cu(I) and Ag(I) salts to form the corresponding O-complexes. The three-dimensional structure of the ligands has been established from31P NMR and1H NMR data.

Supramolecular Complexes of Diglycidyl Methylphosphonate with Calix[4]resorcinolarene

Various-composition supramolecular complexes of calix[4]resorcinolarene with diglycidyl methylphosphonate were synthesized in organic solvents. The products have well-defined melting points, they are cleaved by acetylation, but remain unchanged on treatment with triethylamine.

Reaction of myrtenal with dimethylamide of chloroacetic acid under the conditions of Darzens reaction

Abstract3-[2-(6,6-Dimethylbicyclo[3.1.1]hept-2-en-2-yl)]-2-dimethylcarbamoyloxirane and the dimethylamide of 2-chloro-3-[2-(6,6-dimethylbicyclo[3.1.1]hept-2-en-2-yl)]-3-(dimethyl-carbamidomethyloxy)propionic acid were obtained by the reaction of myrtenal with dimethylamide of chloroacetic acid in the presence of NaH. The structures of the compounds obtained were confirmed by NMR, IR, UV, and CD spectroscopy and mass-spectrometry.

Synthesis and structural features of 1,3,2,5-dioxaboraphosphorinane complexes with Pt(II) and Pd(II) salts

Complexes of composition L2MCl2 [M=Pt, R=H (I), Me (II), Ph (III)], and LMC12 [M=Pd, R=H (IV)] are prepared by reaction of 4,6-R2-2,5-diphenyl-1,3,2,5-dioxaboraphosphorinanes (L) with MCl2. Far-IR and31P NMR spectroscopy are used to demonstrate that I is cis whereas II and III are trans complexes in the solid. The conformational behavior of I is studied by31P and1H NMR. The asymmetric form of I exhibits anomalous stability.

Synthesis and structure of N-ethyl-N-propargylphosphonamidic chlorides

ConclusionsN-Ethyl-N-propargylethyl(phenyl)phosphonamidic, -phosphonamidothioic, and -phosphonamidoselenoic chlorides were obtained.