ChemInform Abstract: TRANSITION-METAL COMPLEXES OF METHYLENECYCLOPROPANES, RING-OPENING REACTIONS PROMOTED BY PALLADIUM(II)

1974 ◽  
Vol 5 (49) ◽  
pp. no-no
Author(s):  
M. GREEN ◽  
R. P. HUGHES
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Ring Opening ◽  
Ring Opening Reactions

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.

Organoboron synthesis via ring opening coupling reactions

2019 ◽  
Vol 17 (26) ◽  
pp. 6317-6325 ◽  
Author(s):  
Riccardo Gava ◽  
Elena Fernández
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Ring Opening ◽  
Main Group ◽  
Selective Synthesis ◽  
Coupling Reactions ◽  
Organoboron Compounds ◽  
Main Group Metals

This review covers new trends towards the selective synthesis of organoboron compounds where boron reagents and cyclic substrates participate in the generation of carbanions, in the presence of stoichiometric amounts of main-group metals or catalytic amounts of transition metal complexes, via ring opening coupling transformations.

Some Organometallic Chemistry of Tetracyanoethene: CN-displacement and Cycloaddition Reactions with Alkynyl - Transition Metal Complexes and Related Chemistry

2011 ◽  
Vol 64 (1) ◽  
pp. 77 ◽  
Author(s):  
Michael I. Bruce
Keyword(s):  
Optical Properties ◽  
Transition Metal ◽  
Metal Complexes ◽  
Organometallic Chemistry ◽  
Transition Metal Complexes ◽  
Ring Opening ◽  
Metal Centre ◽  
Weakly Bound ◽  
Electronic And Optical Properties ◽  
Electrocyclic Reactions

The highly electron-deficient cyanocarbons tetracyanoethene (tcne) and, to a lesser extent, tetracyanoquinodimethane (tcnq), display a fascinating chemistry with transition metal substrates. In particular, the [2 + 2]-cycloadditions of the cyanocarbons with alkynyl- or poly-ynyl–metal complexes have been extensively studied by the author’s group. These reactions proceed via polar adducts to give σ-cyclobutenyl complexes, which then undergo facile ring-opening (retro-electrocyclic) reactions to form the corresponding butadienyl derivatives. In some cases, further reactions can occur by displacement of weakly bound ligands from the metal centre. The subsequent chemistry of these derivatives has been only cursorily investigated, while related studies of organic analogues have produced molecules with interesting electronic and optical properties.

Cationic Late-Transition-Metal Complexes Catalyze the Ring Opening of Aziridines with Amines

Synthesis ◽  
2011 ◽  
Vol 44 (01) ◽  
pp. 27-36 ◽  
Author(s):  
Christoph Schneider ◽  
Alex Marti ◽  
Saravanan Peruncheralathan
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Ring Opening ◽  
Late Transition Metal ◽  
Late Transition
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