E. D. Lubuzh

Bio: E. D. Lubuzh is an academic researcher from Russian Academy of Sciences. The author has contributed to research in topics: Enantioselective synthesis & Aminolysis. The author has an hindex of 2, co-authored 29 publications receiving 17 citations.

Synthesis and selective hydrogenation of dibenzylbenzenes and α,α′-bis(benzylphenyl)xylenes

Abstract: 1. The following previously undescribed hydrocarbons were prepared: 2-(cyclohexylmethyl)biphenyl, 3-(cyclohexylmethyl)biphenyl, 4-(cyclohexylmethyl)biphenyl, p-biscyclohexylmethylbenzene, 2-(cyclohexylmethyl)bicyclohexyl, 3-(cyclohexylmethyl)bicyclohexyl, 4-(cyclohexylmethyl)bicyclohexyl, 1,2-biscyclohexylmethylcyclohexane, 1,4-biscyclohexylmethylcyclohexane,α,α′-bis-o-benzylphenylxylene, and 1,4-bis[[4-(cyclohexylmethyl)cyclohexyljmethyl] cyclohexane. 2. The hydrogenation of dibenzylbenzenes andα,α′-bisbenzylphenylxylenes of various structure goes in various ways. Thus, under identical conditions of hydrogenation over PtO2 in 2-, 3-, and 4-benzylbiphenyls only one ring is hydrogenated, in p-dibenzylbenzene two rings are hydrogenated, and in α,α′-bis-p-benzylphenyl-p-xylene all five rings are hydrogenated. The selective hydrogenation ofα,α′-bis-p-benzylphenyl-p-xylene could not be effected, either over PtO2 or over Raney nickel.

Rearrangement during the process of thermal telomerization of ethylene with silicon hydrides

Abstract: 1. Compounds of the general formula (CH3)3SiCnO2n +t, where n=2, 4, 6. 8,12,14,16, and (C2O5)3SiCnO2n+1, where n=2, 4,10,12,14,16 were obtained by a telorrierlzation reaction. 2. The IR-spectra of the listed, compounds, which showed the presence of branched chain next to the Si atoms, beginning with n=10, were studied. 3. The assumption is expressed that the spectrally observed rearrangement of the alkyl group Is observed as a result of telomerization by a process analogous to the branching of polyethylene, and leads to the formation of side chains containing more than one carbon atom.

REACTIONS OF ARYLSULFONYL COMPOUNDS WITH AN EXCESS OF AN ORGANOLITHIUM REAGENT 13.* SYNTHESIS OF o-MERCAPTO SULFONES AND o-BISSULFONES OF THE BENZENE, NAPHTHALENE, AND THIOPHENE SERIES FROM o-LITHIO SULFONES

Abstract: 1. Methods have been developed for obtaining o-mercapto sulfones of the benzene, naphthalene, and thiophene series, and derivatives with transition-metal salts have been obtained for them. 2. The presence of an intramolecular hydrogen bond in the o-mercapto sulfones has been shown by IR spectroscopy, and spectral confirmation has been shown of the participation of the sulfonyl group in coordination with the metal in their metal derivatives. 3. A number of o-bissulfones and trissulfones of the benzene and thiophene series have been synthesized. The basic possibility of nucleophilic substitution of one of the sulfone groups in them has been shown.

Study of acetylenic sulfones, sulfoxides, and sulfides by vibrational spectroscopy methods

Abstract: 1. In the investigated series of acetylenic sulfides, sulfoxides and sulfones the maximum indications of conjugation are manifested between the sulfide sulfur and the C≡C bond. 2. The sulfonic group practically does not enter into conjugation with the triple bond, but it does polarize it, thus increasing the acidity of the acetylenic C-H bond. 3. In its effect on the triple bond the sulfoxide group occupies an intermediate position between the S and SO2 groups.

Free-radical reaction of tetrachloroethylene with methanol

Abstract: 1. The reaction of tetrachloroethylene with methanol initiated by di-t-butyl peroxide forms trichloroallyl alcohol, which inhibits this process. The inhibitory effect increases with the concentration of trichloroallyl alcohol. 2. Inhibition results mainly from two radical reactions involving trichloroallyl alcohol; abstraction of a hydrogen atom from the methylene group and addition of a hydroxymethyl radical to the double bond of the alcohol.

Hydrogenation of the liquid organic hydrogen carrier compound dibenzyltoluene – reaction pathway determination by 1H NMR spectroscopy

Abstract: The catalytic hydrogenation of the LOHC compound dibenzyltoluene (H0-DBT) was investigated by 1H NMR spectroscopy in order to elucidate the reaction pathway of its charging process with hydrogen in the context of future hydrogen storage applications. Five different reaction pathways during H0-DBT hydrogenation were considered including middle-ring preference (middle-side-side, MSS), side-middle-side order of hydrogenation (SMS), side-ring preference (SSM), simultaneous hydrogenation of all three rings without intermediate formation and statistical hydrogenation without any ring preference. Detailed analysis of the 1H NMR spectra of the H0-DBT hydrogenation over time revealed that the reaction proceeds with a very high preference for the SSM order at temperatures between 120 °C and 200 °C and 50 bar in the presence of a Ru/Al2O3-catalyst. HPLC analysis supported this interpretation by confirming an accumulation of H12-DBT species prior to full hydrogenation to H18-DBT with middle ring hydrogenation as the final step.

Strobilurin biosynthesis in Basidiomycete fungi

Abstract: Strobilurins from fungi are the inspiration for the creation of the β-methoxyacrylate class of agricultural fungicides However, molecular details of the biosynthesis of strobilurins have remained cryptic Here we report the sequence of genomes of two fungi that produce strobilurins and show that each contains a biosynthetic gene cluster, which encodes a highly reducing polyketide synthase with very unusual C-terminal hydrolase and methyltransferase domains Expression of stpks1 in Aspergillus oryzae leads to the production of prestrobilurin A when the fermentation is supplemented with a benzoyl coenzyme A (CoA) analogue This enables the discovery of a previously unobserved route to benzoyl CoA Reconstruction of the gene cluster in A oryzae leads to the formation of prestrobilurin A, and addition of the gene str9 encoding an FAD-dependent oxygenase leads to the key oxidative rearrangement responsible for the creation of the β-methoxyacrylate toxophore Finally, two methyltransferases are required to complete the synthesis

Redistribution reactions in the chemistry of silicon

Abstract: In recent years there has been what could be described as a renaissance in the redistribution reaction, and the growing interest in the chemistry of the metalloids has been partially responsible for this renewed interest. The generality and potential synthetic utility of this reaction in the chemistry of silicon, germanium, tin, boron, and phosphorus has necessitated a better understanding of this type of chemical transformation. With the advancement of modern computation and instrumental analytical techniques, this need is slowly being realized. Of the above mentioned elements, the chemistry of silicon has probably been the most intensely studied during recent years and, thus, it is not surprising that the chemistry of silicon provides the most comprehensive picture of the redistribution reaction. The redistribution reaction has been the subject of recent reviews by Moedritzer'\" and by Lockhart3 which cover quite comprehensively the general application of this reaction to silicon chemistry. In this current brief review, we shall confine our attention to the simplest form of this reaction; namely, that involving the redistribution of monodentate ligands about a central silicon atom.