Light-induced olefin metathesis
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TLDR
This survey of the relevant literature summarises past and present developments in the use of light to expedite olefin ring-closing, ring-opening polymerisation and cross-metathesis reactions.Abstract:
Light activation is a most desirable property for catalysis control. Among the many catalytic processes that may be activated by light, olefin metathesis stands out as both academically motivating and practically useful. Starting from early tungsten heterogeneous photoinitiated metathesis, up to modern ruthenium methods based on complex photoisomerisation or indirect photoactivation, this survey of the relevant literature summarises past and present developments in the use of light to expedite olefin ring-closing, ring-opening polymerisation and cross-metathesis reactions.read more
Citations
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Retracing the evolution of monometallic ruthenium-arene catalysts for C-C bond formation.
Lionel Delaude,Albert Demonceau +1 more
TL;DR: Monometallic ruthenium-arene complexes with the generic formula RuX(2)(arene)(L) (L = phosphine or N-heterocyclic carbene) are versatile and efficient catalyst precursors for olefin metathesis and atom transfer radical reactions.
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A Retrosynthetic Approach for Photocatalysis
TL;DR: Visible light-mediated chemical reactions have become very popular within the last 15 years as discussed by the authors, and are not anymore a merely academic field of research, finding its way increasingly into applications in the chemical and pharmaceutical industry.
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Photoinitiated carbonyl-metathesis: deoxygenative reductive olefination of aromatic aldehydes via photoredox catalysis
TL;DR: Carbonyl–carbonyl olefination, known as McMurry reaction, represents a powerful strategy for the construction of oleFins.
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Fast Olefin Metathesis at Low Catalyst Loading
TL;DR: Compared to their respective, conventional, O-Grubbs-Hoveyda complexes, the new complexes are characterized by fast catalyst activation, which translates into fast and efficient ring-closing metathesis (RCM) reactivity.
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Oxidation-Triggered Ring-Opening Metathesis Polymerization
TL;DR: Two of the eight new N-Hoveyda-type complexes were found to be switchable catalysts, in that the reduced form is inactive in the ring-opening metathesis polymerization of cis-cyclooctene (COE), whereas the oxidized complexes produce polyCOE.
References
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The Development of L2X2RuCHR Olefin Metathesis Catalysts: An Organometallic Success Story
Tina M. Trnka,Robert H. Grubbs +1 more
TL;DR: The discussion includes an analysis of trends in catalyst activity, a description of catalysts coordinated with N-heterocyclic carbene ligands, and an overview of ongoing work to improve the activity, stability, and selectivity of this family of L2X2Ru=CHR complexes.
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Synthesis and activity of a new generation of ruthenium-based olefin metathesis catalysts coordinated with 1,3-dimesityl-4,5-dihydroimidazol-2-ylidene ligands.
TL;DR: These air- and water-tolerant complexes were shown to exhibit an increased ring-closing metathesis activity at elevated temperature when compared to that of the parent complex 2 and the previously developed complex 3.
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Olefin Metathesis and Beyond
TL;DR: In this paper, the authors provide an overview of the development of catalysts for olefin metathesis which combine high activity, durability, and excellent tolerance towards polar functional groups.
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Self-healing materials with microvascular networks
TL;DR: A self-healing system capable of autonomously repairing repeated damage events via a three-dimensional microvascular network embedded in the substrate is reported, opening new avenues for continuous delivery of healing agents for self-repair as well as other active species for additional functionality.
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Living ring-opening metathesis polymerization
TL;DR: A review of living ring-opening metathesis polymerization (ROMP) reactions can be found in this article, along with a discussion of state-of-the-art catalysts for use in living ROMP reactions as well as opportunities for the future.