Reactions of Pyridyl Side-Chain-Functionalized Cyclopentadienes with Metal Carbonyl:  Intramolecular C−H Activation of Pyridine

Abstract

Thermal treatment of the pyridyl side-chain-functionalized cyclopentadienes with Fe(CO) 5 and Ru 3 (CO) 12 gaVe different intramolecular C-H actiVated products, in addition to the normal dinuclear metal complexes. Reactions of the dinuclear metal complexes with I 2 also gaVe different metal iodide complexes.

Reactions of Ruthenium Acetylide and Vinylidene Complexes Containing a 2-Pyridyl Group

“…For example, ortho -substituted pyridyl groups usually act as building blocks in templating metal centers by means of coordination, which leads to supramolecules . Very recently the metal-mediated C−H activation was reported to cause formation of pyridine/quinolidene ortho -carbene complexes .…”

Reactivity of a trinuclear ruthenium complex involving C–H activation and insertion of alkene

“…[12][13][14][15] In addition, some cyclopentadienyl metal complexes containing a substituted donor-functionalized side chain and a Cp*Ru cluster that C-H activates pyridine have been reported. [16][17][18][19] In our previous work we studied the reactions of pyridyl-substituted cyclopentadienes with Ru 3 (CO) 12 and obtained ruthenium carbonyl complexes involving novel intramolecular C-H activation and normal products. 20 By considering that the properties and the reactivity of transition-metal complexes are influenced by the electronic and steric properties of the surrounding ligands, we further studied the reaction of pyridyl-substituted indene with Ru 3 (CO) 12 for obtaining deeper insight into the functional groupdirected Ru-catalyzed intramolecular aromatic C-H activation and reactivity of the corresponding indenyl metal carbonyl complexes.…”

Synthesis and Catalytic Activity of [Cp′Co(COD)] Complexes Bearing Pendant N-Containing Groups

“…Prominent examples include systems with a phosphine ligand connected by variable bridge lengths to the Cp ring, as Butenschön et al have described, but also complexes with chelating olefin moieties. ,, Related Fe(II)-complexes with chelating Cp-tethered NHC ligands have also been reported, as well as CpCr(III)-complexes with coordinated amine donor groups, that have been successfully applied in olefin polymerization catalysis . Moreover, CpRu(II)-complexes containing chelating phosphine-, amine-, or pyridyl- substituted Cp ligands have been described. All these chelating ligand systems bring about higher stability of the respective complexes.…”