Synthesis and reactivity of novel ruthenium carbene catalysts. X-ray structures of [RuCl2(CHSC6H5)(PiPr3)2] and [RuCl2(CHCH2CH2-C,N-2-C5H4N)(PiPr3)]

Schaaf, Paul A. van der; Kolly, Roman; Kirner, Hans-Jürg; Rime, François; Mühlebach, Andreas; Hafner, Andreas

doi:10.1016/s0022-328x(00)00289-8

Cited by 92 publications

(52 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…24 It was clearly shown that variations in substitution pattern of the pyridine ligand of these catalysts influences gel times and T g s of the obtained polymers during the bulk-polymerization of DCPD.…”

Section: Catalysts Bearing Chelating Alkylidene Ligandsmentioning

confidence: 98%

“…In addition, catalyst 38 was straightforwardly immobilized on a polymeric phase containing Brønsted acidic functionalities which resulted in high catalytic activity with minimal ruthenium contamination of the reaction products, a requisite when focusing on the synthesis of biologically active compounds. In another report, Grela et al described the synthesis of a tridentate k 3 -(C,O,O)-complex, 40 (Scheme 17; Table 3, entries [24][25][26], and its use as a chemically switchable catalyst with high regeneration efficiency. 45b Catalyst 40 suffers from a strongly diminished activity, but the carboxylate can be cleaved with hydrochloric acid, thus allowing high catalytic activities.…”

Section: Catalysts Bearing Chelating Alkylidene Ligandsmentioning

confidence: 99%

See 1 more Smart Citation

Latent olefin metathesis catalysts

et al. 2009

View full text Add to dashboard Cite

Olefin metathesis is a versatile synthetic tool for the redistribution of alkylidene fragments at carbon-carbon double bonds. This field, and more specifically the development of task-specific, latent catalysts, attracts emerging industrial and academic interest. This tutorial review aims to provide the reader with a concise overview of early breakthroughs and recent key developments in the endeavor to develop latent olefin metathesis catalysts, and to illustrate their use by prominent examples from the literature.

show abstract

Section: Catalysts Bearing Chelating Alkylidene Ligandsmentioning

confidence: 98%

Section: Catalysts Bearing Chelating Alkylidene Ligandsmentioning

confidence: 99%

Latent olefin metathesis catalysts

et al. 2009

View full text Add to dashboard Cite

show abstract

“…Motif A is the classical Grubbs precatalysts where L 2 is mostly either PCy 3 [4] or H 2 IMes [7], while in Motif D, a hetero-atom like sulfur [14] is typically introduced in the alkylidene ligand of these precatalysts. Hoveyda et al [15][16][17][18] synthesized precatalysts with Motif B that showed exceptional stability that allowed its use in reagent-grade solvents and/or in air [15], while this motif was also used by Van der Schaaf et al [14] for the fine-tuning of gel times for the better handling of ROMP (ring-opening metathesis polymerization) in technical processes. In Motif C, where X is oxygen, the chelating ligand competes in both initiation and coordination with the incoming alkene substrate for a vacant coordination site [17].…”

Section: Synthesis Of Pyridinyl Alcoholsmentioning

confidence: 99%

Synthesis and Application of Novel Ruthenium Catalysts for High Temperature Alkene Metathesis

et al. 2017

View full text Add to dashboard Cite

Four pyridinyl alcohols and the corresponding hemilabile pyridinyl alcoholato ruthenium carbene complexes of the Grubbs second generation-type RuCl(H 2 IMes)(OˆN)(=CHPh), where,1-phenyl methanolato and 1-(2 -pyridinyl)-1-(2 -methoxyphenyl),1-phenyl methanolato, are synthesized in very good yields. At high temperatures, the precatalysts showed high stability, selectivity and activity in 1-octene metathesis compared to the Grubbs first and second generation precatalysts. The 2-/4-chloro-and 4-methoxy-substituted pyridinyl alcoholato ligand-containing ruthenium precatalysts showed high performance in the 1-octene metathesis reaction in the range 80-110 • C. The hemilabile 4-methoxy-substituted pyridinyl alcoholato ligand improved the catalyst stability, activity and selectivity for 1-octene metathesis significantly at 110 • C.

show abstract

“…Arylthio substituted Fischer type carbenes were also found to be suited for prolongation of gel times. 5 Further efforts comprise the work of Grubbs and coworkers, 6 Herrmann and coworkers, inactivity at room temperature nor high activity at elevated temperature have been achieved with these systems.…”

Section: Introductionmentioning

confidence: 99%