Ruthenium-based catalysts for the ring opening metathesis polymerisation of low-strain cyclic olefins and of functionalised derivatives of norbornene and cyclooctene

Abstract

New, readily available catalyst systems based on [(arene)RuC12phosphinel complexes activated by addition of trimethylsilyldiazomethane are very active for promoting the ring opening metathesis polymerisation (ROMP) of functionalised norbornenes and cyclooctenes.

Ring-opening metathesis polymerization of new ?-norbornenyl poly(?-caprolactone) macromonomers

“…3 The growing importance of these catalysts has to be found in increased tolerance toward a wide range of polar functionalities. 4 Moreover, they have a high activity toward strained (norbornene) and low-strain (cyclooctene) olefins, in contrast to the first generation of ruthenium-based ROMP catalysts. In a previous paper, we reported the synthesis of poly(norbornene)-graft-poly(-caprolactone) by a "grafting-from" strategy.…”

Mono and dinuclear half-sandwich platinum group metal complexes bearing pyrazolyl-pyrimidine ligands: Syntheses and structural studies

“…In many cases the charge transfer properties of these compounds justify this interest. Especially with these nitrogen donor ligands have been shown to be effective catalysts for oxidation reactions [11][12][13][14][15][16][17][18][19] and for ringopening metathesis polymerization [20] and recent studies of arene ruthenium complexes have shown that they are found to inhibit cancer cell growth [21][22][23][24][25][26], as non-linear optical (NLO) materials [27,28]. For a majority of the complexes studied, the metal centers are linked by a bridging ligand and the nature of the bridge has a fundamental influence on the electronic interaction between the metals and therefore on the characteristics of the material.…”

Study of complexes of platinum group metals containing nitrogen bases derived from pyridine aldehydes: Interesting molecular structures with unpredicted bonding modes of the ligands

“…Such complexes have been prepared as part of studies in diverse areas such as inter-metallic communication [1], bioinorganic enzyme active site modeling [2], supramolecular approaches to chiral materials [3] and functional devices [4]. The organometallic chemistry of half sandwich complexes have been broadly developed in the past few decades, due to their wide range of potential applications as catalyst precursors for hydrogen transfer [5,6], ring opening metathesis polymerization [7,8] and olefin oxidation [9]. Arene ruthenium compounds have also been extensively investigated for their persuasive antibacterial and anticancer activity [10,11].…”