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- W2952830520 abstract "Metathesis has persisted through the years as a formidable synthetic approach to various unsaturated organic molecules and macromolecules. The 21st century developments in olefin metathesis continue to feature more efficient and selective, well-defined metathesis catalysts. Due to the easily regulated steric and electronic properties of ‘pseudo-halide’ derivatives, their study has launched a new milestone in ruthenium- and molybdenum-based catalysis. Synthesizing ‘pseudo-halide’ derivatives often entails replacing halide ligands with easily modified carboxylates, perfluorocarboxylates, phenoxides, isocyanates, isothiocyanates, pyridines, nitrates, and trifluoromethanesulfonates. This account elucidates the recent advances in ‘pseudo-halide’-containing olefin metathesis, including synthetic approaches to obtain new catalysts and optimization of the ligand sphere. Several innovations in Ru- and Mo-alkylidenes that concern initiation efficiency, reactivity, stereoselectivity, supported catalysis, cyclopolymerization, and copolymerization are described. Refinement of the anionic ‘pseudo-halide’ ligands has enabled the perfection of Ru- and Mo-based metathesis catalysts in both reactivity and selectivity. These advances have led to stereoselectivity in polymerizations, improved copolymerization affinity, and the regioselective cyclopolymerization of 1,6-heptadiynes to result in conjugated polymers solely based on five-membered repeat units." @default.
- W2952830520 created "2019-06-27" @default.
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- W2952830520 date "2011-12-22" @default.
- W2952830520 modified "2023-09-23" @default.
- W2952830520 title "‘Pseudo-halide’ Derivatives of Grubbs- and Schrock-Type Catalysts for Olefin Metathesis" @default.
- W2952830520 doi "https://doi.org/10.1055/s-0031-1290120" @default.
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