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G. I. Nikishin

Bio: G. I. Nikishin is an academic researcher from Russian Academy of Sciences. The author has contributed to research in topics: Radical & Homolysis. The author has an hindex of 11, co-authored 280 publications receiving 540 citations.


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TL;DR: In this article, the free-radical addition of the esters of pyruvic, cyanoacetic, acetoacetic and alkylmalonic acids to 1-alkenes was performed under the influence of the Mn(OAc)3-Cu(OAC)2 system.
Abstract: Unsaturated adducts with aγ,δ-position of the multiple bond were obtained by the free-radical addition of the esters of pyruvic, cyanoacetic, acetoacetic, malonic, and alkylmalonic acids to 1-alkenes, which was accomplished under the influence of the Mn(OAc)3-Cu(OAc)2 system.
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TL;DR: In this paper, the trichlorovinyl group and potential interest as herbicides were prepared and the reaction of ethanol with tetrachloroethylene 3,4,4-triehloro-3-buten-2-ol and 1,1,2,3-triclopropene were studied.
Abstract: 1. Reaction between methanol and tetrachloroethylene at a molar ratio of 4 ∶ 1 at 570° leads to the formation of 2,3,3-trichloro-2-propen-1-ol in 25–35% yield. 2. In the reaction of ethanol with tetrachloroethylene 3,4,4-triehloro-3-buten-2-ol and 1,1,2,3-tetrachloropropene were studied. A number of substances containing the trichlorovinyl group and of potential interest as herbicides were prepared.
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TL;DR: The free-radical addition of succinic anhydride to 2-ethyl-1-hexene, 2-octene, and the hexyl and octyl allyl ethers (initiator=tert-butyl peroxide), respectively, gave the 2-methylhexyl-, 1-methylheptyl- and 1-ethylhexyl-(1∶1 mixture), and 4-oxadecyl-, and 4oxadodecylsuccinic an hydrides as discussed by the authors.
Abstract: 1. Replacing the hydrogen, atoms of the vinyl grouping in 1-alkenes by alkyl groups substantially lowers the ability of the olefins to form the 1∶1 adducts with succinic anhydride in the free-radical addition reaction. 2. The free-radical addition of succinic anhydride to 2-ethyl-1-hexene, 2-octene, and the hexyl and octyl allyl ethers (initiator=tert-butyl peroxide), respectively, gave the 2-ethylhexyl-, 1-methylheptyl- and 1-ethylhexyl-(1∶1 mixture), and 4-oxadecyl-, and 4-oxadodecylsuccinic anhydrides.
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TL;DR: The free-radical addition of the methyl ester and nitrile of 3-methoxypropionic add to alkenes, initiated with ditert-butyl peroxide, leads to the formation of 1:1 adducts which consist of methyl esters or nitriles of 2-alkyl-3methoxide, 3-alky-3 methoxy-, 3-alkyl-3-methyltimoxy-, and 3 -alkoxy substituted propionic acids.
Abstract: 1. The free-radical addition of the methyl ester and nitrile of 3-methoxypropionic add to alkenes, initiated with ditert-butyl peroxide, leads to the formation of 1:1 adducts which consist of the methyl esters or nitriles of 2-alkyl-3-methoxy-, 3-alkyl-3-methoxy-, and 3-alkoxy substituted propionic acids. 2. The reaction is accompanied by the formation of a small quantity of by-products produced by the partialβ-dissociation of the CH2OCH2CH2COOCH3 and CH3OCHCH2COOCH3 radicals.
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TL;DR: In this paper, the Na2S2O8-AgNO3 system was used to obtain acetophenone, butyrophenone, 1-indanone, and 1-tetralone.
Abstract: Acetophenone, butyrophenone, 1-indanone, and 1-tetralone are obtained by the oxidation of ethylbenzene, butylbenzene, indan, and tetralin by anNa2S2O8-AgNO3 system in water and in aqueous acetone.

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08 Dec 2001-BMJ
TL;DR: There is, I think, something ethereal about i —the square root of minus one, which seems an odd beast at that time—an intruder hovering on the edge of reality.
Abstract: There is, I think, something ethereal about i —the square root of minus one. I remember first hearing about it at school. It seemed an odd beast at that time—an intruder hovering on the edge of reality. Usually familiarity dulls this sense of the bizarre, but in the case of i it was the reverse: over the years the sense of its surreal nature intensified. It seemed that it was impossible to write mathematics that described the real world in …

33,785 citations

Journal ArticleDOI
TL;DR: Recent progress in the field of organometallic cobalt-catalyzed C–H activation is reviewed until November 2015.
Abstract: Catalytic C–H activation has emerged as a powerful tool for sustainable syntheses. In the recent years, notable success was achieved with the development of cobalt-catalyzed C–H functionalizations with either in situ generated or single-component cobalt-complexes under mild reaction conditions. Herein, recent progress in the field of organometallic cobalt-catalyzed C–H activation is reviewed until November 2015.

953 citations

Journal ArticleDOI
TL;DR: This analysis comprehensively review all asymmetric transition-metal-catalyzed methodologies that are believed to proceed via an inner-sphere-type mechanism, with an emphasis on the nature of stereochemistry generation.
Abstract: The development of new methods for the direct functionalization of unactivated C–H bonds is ushering in a paradigm shift in the field of retrosynthetic analysis. In particular, the catalytic enantioselective functionalization of C–H bonds represents a highly atom- and step-economic approach toward the generation of structural complexity. However, as a result of their ubiquity and low reactivity, controlling both the chemo- and stereoselectivity of such processes constitutes a significant challenge. Herein we comprehensively review all asymmetric transition-metal-catalyzed methodologies that are believed to proceed via an inner-sphere-type mechanism, with an emphasis on the nature of stereochemistry generation. Our analysis serves to document the considerable and rapid progress within in the field, while also highlighting limitations of current methods.

648 citations