T. V. Baulina

Synthesis and coordination properties of new preorganized ligand on the triphenylphosphine oxide platform

Tris(2-cyanomethoxyphenyl)phosphine oxide was synthesized by the reaction of tris-(2-hydroxyphenyl)phosphine oxide with chloroacetonitrile. Its coordination properties were studied for the complexation with neodymium(iii) and copper(ii) nitrates using vibrational spectroscopy, NMR, and quantum chemical calculations.

Synthesis and Coordination Properties of Tripodal Ligand on the Triphenylphosphine Oxide Platform with Carbamoyl Side Arms

Abstract A new tripodal O-donor ligand, tris(2-N,N-dibutylcarbamoylmethoxyphenyl)phosphine oxide (L), was synthesized. This potentially tetradentate ligand L exhibits variable denticity upon complexation with UO2(NO3)2, Nd(NO3)3, and Lu(NO3)3. The complexes were studied by elemental analysis, IR, and 1H, 13C, and 31P NMR spectroscopy. [Supplementary materials are available for this article. Go to the publishers online edition of Phosphorus, Sulfur, and Silicon and the Related Elements for the following free supplemental files: Additional text, tables, and figures.] GRAPHICAL ABSTRACT

N -Alkyl- N ′-[(alkyl/aryl)(alkoxy/aroxy)phosphoryl]ureas: synthesis and extraction properties toward f-elements

A reaction of chlorophosphonates R1R2P(O)Cl with NaOCN and subsequent treatment with octylamine lead to phosphorylureas R1R2P(O)NHC(O)NHC8H17-n (R1 = EtO, PhO; R2 = Me, Ph). Their extraction capability toward UVI and a number of tervalent lanthanides (LaIII, NdIII, HoIII, YbIII) was studied. Efficiency and selectivity of these ligands in the extraction of f-elements from nitric acid solutions to chloroform were compared with extraction properties of a model phosphine oxide-type phosphorylurea MePhP(O)NHC(O)NHC8H17-n and carbamoylphosphine oxide Ph2P(O)CH2C(O)NBu2.

Synthesis of precursors to new tripodal phosphine oxide ligands

A number of precursors of new tripodal ligands was obtained by hydroxyethylation of the starting tris(2-hydroxyphenyl)phosphine oxide, followed by conversion of the resulting tris[2-(2-hydroxyethoxy) phenyl]phosphine oxide to trimesylate. The treatment of the latter with LiBr or NaN3 afforded the corresponding tribromo and triazido derivatives.

Catalytic synthesis of O-aryl methyl(phenyl)phosphonochloridates

The reaction of methyl- and phenyldichlorophosphonates with phenols in the presence of anhydrous magnesium chloride (catalyst) or magnesium metal (procatalyst) has been used as a simple, efficient, and industrially feasible method for the synthesis of the corresponding O-aryl alkyl(aryl)phosphonochloridates.

Reactions of phosphonic and phosphoric dichlorides with sodium cyanate as a general synthesis method of phosphoryldiisocyanates

In this connection we investigated the reactions of some typical phosphonic and phosphoric dichlorides with accesible sodium cyanate. It was established that reaction of phenyldichlorophosphonate with sodium cyanate proceeds at room temperature in anhydrous acetonitrile medium for 4 h, the content of diisocyanate in the mixture formed 93% according to the P NMR data. After distilling the product yield comprises 61% (Tables 1, 2). DOI: 10.1134/S1070363210050324