scispace - formally typeset
Search or ask a question
Author

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.


Papers
More filters
Journal ArticleDOI
TL;DR: In this article, the authors showed that the reaction proceeds by alkyne insertion into the metal-hydride bond of the intermediate (alkynyl)(hydride)Rh III complexes VII, VIII to give the (alklynyl)(vinyl) rh III species cis - (IX) and cis- (X) which were isolated.

49 citations

Journal ArticleDOI
TL;DR: In this paper, the most promising methods for the synthesis of functionally substituted cyclopropanes, namely, the electrocatalytic cascade and multicomponent transformations of CH acids and also the joint electrolysis of CH acid and activated alkenes or carbonyl compounds in the presence of alkali metal halides as mediators, are discussed.
Abstract: Data on methods of electrochemical synthesis of cyclopropanes are summarized and described systematically. Direct electrochemical methods to afford cyclopropanes in both cathodic and anodic processes are considered. Among indirect electrochemical methods such as the processes employing electrogenerated bases and also those involving electrogenerated metal complexes, attention is focused on the most promising methods for the synthesis of functionally substituted cyclopropanes, namely, the electrocatalytic cascade and multicomponent transformations of CH acids and also the joint electrolysis of CH acids and activated alkenes or carbonyl compounds in the presence of alkali metal halides as mediators. The bibliography includes 62 references.

34 citations

Journal ArticleDOI
TL;DR: In this paper, the kinetics and mechanism of intramolecular hydroacylation catalyzed by complexes Co2(μ-N2)(PPh3)6 (III) and (PPh 3)2Co(dppe) (IV) (dppe-1,2-bis(di-phenylphosphino)ethane) were studied.

32 citations

Journal ArticleDOI
TL;DR: Aliphatic and alicyclic gem-bis-hydroperoxides and their derivatives, bis(1-hydric peroxides), dispiro-and tetraalkyl-1,2,4,5-tetroxanes were synthesized by the reaction of aliphatic alicycic acetals and enol ethers with H2O2 in the presence of BF3 in anhydrous Et2O.
Abstract: Aliphatic and alicyclic gem-bis-hydroperoxides and their derivatives, bis(1-hydroperoxycycloalkyl) and bis(1-hydroperoxyalkyl) peroxides, dispiro- and tetraalkyl-1,2,4,5-tetroxanes were synthesized by the reaction of aliphatic and alicyclic acetals and enol ethers with H2O2 in the presence of BF3 in anhydrous Et2O.

21 citations

Journal ArticleDOI
TL;DR: The trioxolane ring is formed by the carbonyl groups located in the δ-position with respect to each other as discussed by the authors, which is the same as the trioxoline ring formed by β,δ-triketones.
Abstract: Heterogeneous reactions of β,δ-triketones with ethereal hydrogen peroxide in nonpolar solvents, catalyzed by phosphomolybdic acid, afforded mixtures of stereoisomeric ozonides, tricyclic monoperoxides, and bridged tetraoxanes. The trioxolane ring is formed by the carbonyl groups located in the δ-position with respect to each other.

18 citations


Cited by
More filters
Journal ArticleDOI

[...]

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