Modifications of substituents on the chelating oxygen atom in stereoretentive Hoveyda–Grubbs-type complexes and their influence on catalytic properties

Catalysis Science & Technology, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Novel Z -stereoretentive metathesis catalysts with enhanced stability and outstanding stereoselectivity are reported. They demonstrate a broad substrate scope diverse applications, offering new possibilities for advanced synthetic transformations.

Language: Английский

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Testing Differently Substituted Quinoxaline‐2,3‐Dithiolate Ligands in Z‐Stereoretentive Olefin Metathesis Leading to Pheromone of Rice Yellow Stem Borer (Scirpophaga incertulas)

European Journal of Lipid Science and Technology, Journal Year: 2025, Volume and Issue: unknown

Published: March 23, 2025

ABSTRACT Stereoselective olefin metathesis offers access to geometrically well‐defined C–C double bonds and is considered a promising new method for transforming plant oils valuable chemicals. A set of Z ‐stereoretentive catalysts bearing quinoxaline‐2,3‐dithiolate ligands functionalized with halogens, electron‐withdrawing (EWG), electron‐donating (EDG), π‐altered were obtained characterized. New tested in model ‐stereoselective cross‐metathesis (CM) the synthesis pheromone rice yellow stem borer ( Scirpophaga incertulas ). Although none surpassed parent catalyst Ru5a —featuring non‐substituted ligand—the ester‐substituted complex Ru5h offered similarly high level ‐selectivity (>95:5) productivity, whereas carboxylic ester function can open perspectives future immobilization or polar‐tagging. Practical Applications : Decreasing availability fossil organic feedstock current policies European Union drive scientists look alternative sustainable sources fine In this context, preferential One them sex pheromones various insects—biodegradable non‐toxic chemical substances—used small amounts lure insects into traps. present work, female ) was yield selectivity, showing possible application newly field modern environmentally conscious farming.

Language: Английский

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Ammonium Tagged Hoveyda-Grubbs Catalyst Immobilized on Yolk/Shell Silica Gels with a Hydrophobic Shell for Olefin Metathesis Reactions

Dalton Transactions, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

This work presents a novel yolk–shell silica material with hydrophobic shell and void interphase to encapsulate quaternary ammonium-tagged Hoveyda–Grubbs catalysts (Aquamet) for efficient ring-closing metathesis ethenolysis reactions.

Language: Английский

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The Chemistry of Oleates and Related Compounds in 2020s

Green Chemistry, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

In this tutorial review, the most important and actual issues of oleochemistry, including preparation oleates related compounds their transformation with without breaking CC bond, are addressed discussed.

Language: Английский

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