Dihydrofuropyridines in reactions of pyridoxal imine with 2-chloro-1,3,2-dioxaphosphorinanes

Russian Journal of General Chemistry -     

Phosphorylation of pyridoxal azomethines. Synthesis of phosphorus containing azomethines and furopyridines

New O-phosphorylated pyridoxal derivatives have been synthesized through the reaction of azomethines with Р^V acid chlorides. 2-Chloro-2-thioxo-5,5-dimethyl-1,3,2-dioxaphosphinanes and diethylchlorothiophosphate have been employed as phosphorylating agents. Regardless of the nature of the phosphorylating agent, the reaction is regioselective at phenolic hydroxyl group. The structure of final products is determined by the nature of the substituent at the nitrogen atom. If R is alkyl or cycloalkyl group, the products of the reaction represent phosphorylated pyridoxal imines, whereas phosphorylated furopyridines are formed in the case R is aryl substituent.     

Synthesis of New Bulky Bis(amidine) with the Conformationally Rigid meta-Phenylene Bridge and Its Dilithium Derivative [1,3-C6H4{NC(Ph)N(2,6-iso-Pr2C6H3)}2]Li2(TMEDA)2

Russian Journal of Coordination Chemistry - The reaction of 2,6-diisopropylaniline with m-phenylenedibenzimidoyl chloride 1,3-C6H4{N=C(Ph)Cl}2 in the presence of triethylamine in a toluene solution...     

Cleavage of B−C bonds and Anion [PhBH3]− Formation in the Reaction of the Yb(II) Hydride Complex with BPh3

Russian Journal of Coordination Chemistry - The reaction of the amidinatehydride complex of divalent ytterbium [(Amd)YbII(μ2-H)]2 (Amd is {tert-BuC(NC6H3-iso-Pr2-2,6)2}) with BPh3 proceeds...     

Detection of the Electric Potential Surface Distribution with a Local Probe Based on a Field Effect Transistor with a Nanowire Channel

Technical Physics - A non-destructive method of scanning probe microscopy for simultaneous measurements of the surface topography and electric field (charge, potential) distribution is...     

Reactions of alkali metal diphenylmethanides [(3,5-Bu2t-2-MeO-C6H2)2CH]M (M = Li,K) with LnCl3. The synthesis and structure of the complex [(3,5-Bu2t-2-MeO-C6H2)2CH]2ScCl

Russian Chemical Bulletin - The outcome of the exchange reactions of alkali metal diphenylmethanides [(3,5-Bu2t-MeO-C6H2)2CH]M (M = Li (2), K (3)) with LnCl3 is determined by the nature of the...     

Families of exact solutions for linear and nonlinear wave equations with a variable speed of sound and their use in solving initial boundary value problems

We propose a procedure for multiplying solutions of linear and nonlinear one-dimensional wave equations, where the speed of sound can be an arbitrary function of one variable. We obtain exact solutions. We show that the functional series comprising these solutions can be used to solve initial boundary value problems. For this, we introduce a special scalar product.     

Kinetics of the interaction of a liquid diffusing into another one as studied by reflection spectroscopy (ATR)

An approach is offered for determining the reaction rate constant (k) between two liquid substances, the one penetrating into the other. The procedure is based on the experimental measurement of the diffusion coefficient (D). As model reaction the isotopic exchange process in the ketone octanone-2 molecule is chosen, whose active hydrogen atoms undergo deuteration by the strong base trioctyl-methyl-ammonium deuteroxide (TOMAOD). The diffusion coefficient of the penetrating TOMA-OD, when this reaction takes place, and the rate constant of the latter are determined by an attenuated total reflection (ATR) spectroscopic method [1] on the grounds of appropriate mathematical modeling [2]. The application of this simple and comparatively rapid approach results in thek-value of 1.04 × 10^?2 sec^?1 for the monomolecular interaction mentioned above. The reasons for such an assumption arise from the only initial process stage treatment, where the reactant (TOMA-OD) particles enter the substrate (the ketone) surrounded by an excess of its own molecules. This further allows an analytical solution of the resulting diffusion problem.