Cobalt-catalyzed ring-opening addition of azabenzonorbornadienes via C(sp3)–H bond activation of 8-methylquinoline

2020 ◽  
Vol 56 (83) ◽  
pp. 12570-12573
Author(s):  
Heng Tan ◽  
Ruhima Khan ◽  
Dandan Xu ◽  
Yongyun Zhou ◽  
Xuexin Zhang ◽  
...  
Keyword(s):  
Ring Opening ◽  
Bond Activation

The first ring-opening addition of a benzylic C(sp3)–H bond to azabenzonorbornadienes is demonstrated.

Recent Advances in Transition Metal Catalyzed C-H Functionalization Reactions Involving Aza/Oxabicyclic Alkenes

Synthesis ◽  
2021 ◽  
Author(s):  
Masilamani Jeganmohan ◽  
Pinki Sihag
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Ring Opening ◽  
Bond Activation ◽  
Considerable Progress ◽  
Double Bonds ◽  
Facial Selectivity ◽  
Ring Opening Reactions ◽  
Metal Catalyzed

Bicyclic alkenes, including Oxa- and azabicyclic alkenes can be readily activated by using transition-metal complexes with facial selectivity, because of the intrinsic angle strain on carbon-carbon double bonds of these unsymmetrical bicyclic systems. During last decades considerable progress has been done in the area of ring-opening of bicyclic strained ring by employing the concept of C-H activation. This Review comprehensively compiles the various C-H bond activation assisted reactions of oxa- and azabicyclic alkenes, viz., ring-opening reactions, hydroarylation as well as annulation reactions.

Application of Rh(I)-Catalyzed C−H Bond Activation to the Ring Opening of 2-Cycloalkenones in the Presence of Amines

2002 ◽  
Vol 4 (9) ◽  
pp. 1595-1597 ◽  
Author(s):  
Chul-Ho Jun ◽  
Choong Woon Moon ◽  
Sung-Gon Lim ◽  
Hyuk Lee
Keyword(s):  
Ring Opening ◽  
Bond Activation

CH Bond Activation of Unsaturated Hydrocarbons by a Niobium Methyl Cyclopropyl Precursor. Cyclopropyl Ring Opening and Alkyne Coupling Reaction

2016 ◽  
Vol 36 (1) ◽  
pp. 53-63 ◽  
Author(s):  
Pascal Oulié ◽  
Chiara Dinoi ◽  
Chen Li ◽  
Alix Sournia-Saquet ◽  
Kane Jacob ◽  
...  
Keyword(s):  
Ring Opening ◽  
Bond Activation ◽  
Coupling Reaction ◽  
Unsaturated Hydrocarbons ◽  
Ch Bond Activation ◽  
Alkyne Coupling

Beryllium-Induced CN Bond Activation and Ring Opening of an N-Heterocyclic Carbene

2012 ◽  
Vol 124 (9) ◽  
pp. 2140-2142 ◽  
Author(s):  
Merle Arrowsmith ◽  
Michael S. Hill ◽  
Gabriele Kociok-Köhn ◽  
Dugald J. MacDougall ◽  
Mary F. Mahon
Keyword(s):  
Ring Opening ◽  
Bond Activation

scholarly journals Pd-Catalyzed Acyl C–O Bond Activation for Selective Ring-Opening of α-Methylene-β-lactones with Amines

2017 ◽  
Vol 19 (8) ◽  
pp. 1966-1969 ◽  
Author(s):  
Christian A. Malapit ◽  
Donald R. Caldwell ◽  
Nicole Sassu ◽  
Samuel Milbin ◽  
Amy R. Howell
Keyword(s):  
Ring Opening ◽  
Bond Activation ◽  
Selective Ring Opening

scholarly journals Catalytic asymmetric C–Si bond activation via torsional strain-promoted Rh-catalyzed aryl-Narasaka acylation

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Jia Feng ◽  
Xiufen Bi ◽  
Xiaoping Xue ◽  
Na Li ◽  
Lei Shi ◽  
...  
Keyword(s):  
Natural Products ◽  
Ring Opening ◽  
Kinetic Resolution ◽  
Bond Activation ◽  
Bond Cleavage ◽  
Catalytic Synthesis ◽  
Torsional Strain ◽  
Silanol Groups ◽  
Bioactive Natural Products ◽  
Ring Opening Reaction

Abstract Atropisomers are important organic frameworks in bioactive natural products, drugs as well as chiral catalysts. Meanwhile, silanols display unique properties compared to their alcohol analogs, however, the catalytic synthesis of atropisomers bearing silanol groups is challenging. Here, we show a rhodium-catalyzed torsional strain-promoted asymmetric ring-opening reaction for the synthesis of α-silyl biaryl atropisomers. The reaction features a dynamic kinetic resolution of C(Ar)-Si bond cleavage, whose stereochemistry was controlled by a phosphoramidite ligand derived from (S)-3-methyl-1-((2,4,6-triisopropylphenyl)sulfonyl)piperazine. This work is a demonstration of an aryl-Narasaka acylation, where the C(Ar)-Si bond cleavage is promoted by the torsional strain of α, α’-disubstituted silafluorene.

Catalytic C–F bond activation of geminal difluorocyclopropanes by nickel(i) complexes via a radical mechanism

2016 ◽  
Vol 52 (1) ◽  
pp. 202-205 ◽  
Author(s):  
Jan Wenz ◽  
Christoph A. Rettenmeier ◽  
Hubert Wadepohl ◽  
Lutz H. Gade
Keyword(s):  
Good Yield ◽  
Ring Opening ◽  
Bond Activation ◽  
Radical Mechanism ◽  
Pincer Ligands

Nickel(ii) fluorido complexes bearing NNN-pincer ligands were found to be catalysts in the hydrodefluorination of geminal difluorocyclopropanes which undergo ring-opening to form the corresponding monofluoroalkenes in good yield and high Z-selectivities.

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