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An effective route to the oxidation of organic derivatives of trivalent phosphorus with an aqueous solution of hydrogen peroxide was considered. Phenylphosphonites, including those having a hydrolytically unstable phosphorus-nitrogen bond were involved into the oxidation. The identification of oxidation products, the phenylphosphonates, was carried out using the method of ion cyclotron resonance mass spectrometry with Fourier transform combined with electrospray ionization, and by 31P and 1H NMR spectroscopy. The influence of an effective antioxidant of natural origin, quercetin, on the oxidation was demonstrated.

Reactions of phosphorous triamides with symmetrical diols in equimolar ratio were studied. These reactions result in formation of unique poly(oligo)amidophosphorous systems. The products obtained are used as ligands for the synthesis of metal complexes of a new type.

4,4′-Dihydroxybiphenyl was condensed with phenylphosphonous tetraethyldiamide. The moleccular mass, chemical composition, and structural features of the product, oligo(4,4′-biphenylene phenylphosphonite), were elucidated using the method of matrix-activated laser desorption/ionization, with a time-of-flight (TOF) mass analyzer. The oligophenylphosphites containing labile P-N bond, which are unstable under conditions of recording mass spectra, were stabilized by conversion into oligophenylphosphonates. 1H-Tetrazole catalyzes the reaction of phenylphosphonous tetraethyldiamide with 4,4′-dihydroxybiphenyl. Cross-linking in the solid state of the oligo(4,4′-biphenylene phenylphosphonite) containing terminal phosphonamidite group leads to gradual increase in the molecular weight and is accompanied by redox processes.

Condensing phosphorylation of 1,6-hexanediol, 1,4-dihydroxybenzene, 4,4′-dihydroxybiphenyl, and 2,2-bis(4′-hydroxyphenyl)propane by phenylphosphonous acid tetraethylamide was effected by treatment of the disperse reaction system with high-frequency sound. This treatment ensures efficient shift of the phase equilibrium in the course of condensation and increases the yield of phenylphosphonous acid oligoesters.

Step high-temperature condensation of dihydric phenols [1,4-dihydroxybenzene, 4,4′-dihydroxybiphenyl, and 2,2′-bis(4-hydroxyphenyl)propane] with phenylphosphonous bis(diethylamide) is carried out. The molecular weight, composition, and structure of the resulting oligomeric arylene phenylphosphonites were assessed by means of matrix-assisted laser desorption/ionization time-of-flight mass spectrometry. The widest mass range was observed in the mass spectrum of 4,4′-dihydroxybiphenyl, which corresponds to an oligomer having about 30 elementary units. The obtained data agree with the the molecular weight measured by high-speed sedimentation. The reactions of phenylphosphonous bis(diethylamide) with dihydric phenols give both acyclic and cyclic arylene phenylphosphonites.

It was shown previously that the larch wood waste can be efficiently processed by passing as aqueous pulp through a disintegrator of cavitator type [1, 2]. By this procedure the wood waste is transformed into a new polymer material called “Cavitated wood.” Besides the cavitated wood, therewith are formed lowmolecular substances: the dihydroquercetin flavonoid, terpenes, terpenoids, etc. [2]. Apparently, the essence of the phenomenon lies in the reorganization of the polymer structure of the original wood raw material, by moving some of its –Ar–C–C–C–X nano-sized blocks. Let us call this lignin nano-isomerization.