Higher order symmetrizer and application to an unusual transport equation

We study a class of stationary transport equation with nonlocal low-order tems We obtain the existence and uniqueness of a solution in sobolev spaces     

Synthesis and Cytotoxic Activity of 1,3,5-Triazinane Derivatives Based on Primary Amines and Amino Acids Esters

Russian Journal of General Chemistry - A series of 1,3,5-triazinane derivatives was synthesized and their cytotoxic activity was studied in vitro on normal cell line (HEK293) and tumor cell lines...     

Oxidation of some cage hydrocarbons by dioxiranes. Nature of the transition structure for the reaction of C-H bonds with dimethyldioxirane: a comparison of B3PW91 density functional theory with experiment

Dimethyl- (DMD) and methyl(trifluoromethyl)-dioxiranes were used for oxyfunctionalization of spiro{1',7-cyclopropan-(E)-2-methylbicyclo[2.2.1]heptane} (), tricyclo[3.2.2.0(2,4)]nonane (), exo-endo-endo- () and exo-exo-exo- () heptacyclo[9.3.1.0(2,10).0(3,8).0(4,6).0(5,9).0(12,14)]pentadecane, yielding tertiary alcohols as the main products. The rate constants for oxidation of by DMD were measured and the Arrhenius parameters determined. The DFT theory (B3LYP and B3PW91) using restricted and unrestricted methods was employed to study the oxidation reaction of the C-H bond of cage hydrocarbons , adamantane, and acetone with DMD. The kinetic isotopic effect calculated using unrestricted methods agreed with experiment. The reaction mechanism in terms of the concerted oxygen insertion vs. the radical part is discussed.     

ZrCl4-Catalyzed scission of ethylene acetals with organoaluminum compounds

Ethylene acetals and ethylene ketals undergo reductive scission under the action of Buⁱ ₂AlH in the presence of catalytic amounts of ZrCl₄. With Et₃Al and Buⁱ ₃Al, reductive alkylation also occurs. Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 8, pp. 1550–1552 August, 1999.     

求解复杂湍流的非线性涡黏性系数模型和代数应力模型

非线性涡黏性系数模型和代数应力模型联系了线性涡黏性系数湍流模型和完整的微分 雷诺应力模型.随着它们受到日益关注,其形式也越来越多样化.本篇综述的目的是对这些模 型加以总结并比较它们之间的共同点及不同之处,指出它们与完整微分雷诺应力模型之间的 关系,以及相对于线性涡黏性系数模型而言它们在预报流场上所具有的优势.     

Chemical transformations of 3-aminopyrrolidin-2-ones of the norbornane and cyclopropane series

3-Aminopyrrolidin-2-ones containing a fused norbornane or spirocyclopropane fragment react with benzaldehyde to give azomethines, which can be transformed into N-substituted 3-aminopyrrolidin-2-ones by reduction with sodium borohydride. Diazotization of amino-pyrrolidinones with NaNO₂ in acetic acid results in the elimination of molecular nitrogen and in the formation of acetoxy or unsaturated derivatives (through stabilization of intermediate carbocations). 6-Methylidene4-azaspiro[2.4]heptan-5-one obtained by diazotization of 6-amino-6-methyl-4-azaspiro[2.4]heptan-5-one easily reacts with diazomethane, diazocyclo-propane, and benzonitrile oxide to yield heterocyclic spiranes by means of 1,3-dipolar cycloaddition.     

Synthesis of Polyfunctionalized Hexahydropyrimidines

Russian Journal of Organic Chemistry - The reactions of alkyl 5-acetylhexahydropyrimidine-5-carboxylates with ammonia, hydrazine hydrate, and lithium aluminum hydride were used to synthesize...     

Transformations of tetracyclo [3.2.0.02,7.04,6]-heptane (quadricyclane) catalyzed by Pd2+ and Pd0 complexes

Conclusions In the presence of palladium(0) complexes, quadricyclone is converted to norbornadiene dimers and trimers.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 2, pp. 475–477, February, 1985.     

Reaction of 2-Mono- and 2,2-Disubstituted 1,3-Dioxolanes with 1-Ethyl-3-hexylaluminacyclopentane

Reaction of 2-mono- and 2,2-disubstituted 1,3-dioxolanes with 1-ethyl-3-hexylaluminacyclopentane involves cleavage of the Al-C bond of the metal cycle and formation, after hydrolysis, ethylene glycol monoethers. Catalytic amounts of ZrCl4 or Ni(acac)₂ drive the reaction with 2-monosubstituted 1,3-dioxolanes.