Steric structure of N-(halomethyl) imides

Conclusions N-(Chloromethyl)- and N-(bromomethyl)imides of phthalic and succinic acids exist in a conformation with arrangement of the C-Hal bond in the plane of the imide ring.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 11, pp. 2487–2490, November, 1980.     

Quasi-integrals and stochastic integration along sample paths

We construct deterministic analogues of the Stratonovich and Itô stochastic integrals, which coincide with the classical stochastic integrals in the case of the Wiener process.     

On continuous local times for functions and stochastic processes

For some classes of functions and stochastic processes X(s), s∈[0,1], with local times continuous with respect to the time parameter, the perturbation problem is considered: under what conditions does the function, X(s)+γ(s) also possess local time. The Hausdorff dimensionality of the level sets X⁻¹(u)={s: X(s)=u} is determined. Supported by the Russian Foundation for Fundamental Research, project 93-011-1447, and by the Bulgarian Academy of Sciences. Proceedings of the XVII Seminar on Stability Problems for Stochastic Models. Kazan, Russian, 1995. Part III.     

Oxidation of N-acyl-2-(cycloalk-1-enyl)anilines with ozone and hydrogen peroxide

Treatment of the ozonization products from N-acetyl- or 2-methyl-N-trifluoroacetyl-6-(cyclopent-1-enyl)anilines with NaBH₄ gives 6-methyl-2-tetrahydropyranylaniline. When treated with Me₂S, the ozonization products yield the corresponding oxoaldehyde dimethyl acetals. The oxidation of N-acetyl-2-(cyclopent-1-enyl)- or -(cyclohex-1-enyl)anilines with H₂O₂ in HCOOH affords -(2-acetamidophenyl)-5-oxopentanoic or -6-oxohexanoic acid, respectively. The reaction of N-acetyl-2-(cyclopent-1-enyl)aniline with H₂O₂ in the presence of Na₂WO₄ and H₃PO₄ gives 3,1-benzooxazine in high yield.     

Synthesis of N-(7-methyl-5-oxo-5H-1M,3,4-thiadiazolo[3,2-a]pyrimidin-2-yl)-N'-phenylhydrazine and its reaction with bromine

Synthesis of the title compound is described and its reaction with bromine is studied. This involves oxidation of the hydrazine moiety and sequential bromination of the benzene and thiadiazolopyrimidine nuclei to give, respectively, 2-(4-bromophenylazo)-7-methyl-5-oxo-5H-1, 3,4-thiadiazolo[3,2-a]pyrimidine and 6-bromo-2-(4-bromophenylazo)-7-methyl-5-oxo-5H-1, 3,4-thiadiazolo[3,2-a]pyrimidine.Translated fromIzvestiya Akademii Nauk, Seriya Khimicheskaya, No. 1, pp. 219–220, January, 1993.     

A new class of photo-induced phenomena in siloxane films

The light induced atomic desorption effect, known as LIAD, is observed whenever Pyrex cells, coated with siloxane films and containing alkali atoms, are illuminated. LIAD is a non-thermal phenomenon and it can be observed even with very weak light intensities. We show that the simultaneous contribution to the photo-emission of atoms adsorbed both at the film surface and within the film must be taken into account in order to fit the experimental data. We demonstrate that both the desorption efficiency and the diffusion coefficient of the alkali atoms embedded in the dielectric film depend on the desorbing light intensity. These features characterize a new class of photo-induced phenomena whose analysis gives new insights in the comprehension of the atom-surface interaction and of the atom-bulk diffusion and opens interesting perspectives for applications. Received 27 April 2000 and Received in final form 15 September 2000