Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 27, Issue 28, Pages 7663-7666Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.202101176
Keywords
gem hydrogenation; Grubbs catalysts; metal carbenes; metathesis; ruthenium
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Funding
- MPG
- Projekt DEAL
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The newly discovered light-driven gem hydrogenation of alkynes provides a safe and versatile approach to synthesizing Grubbs-type ruthenium carbene complexes, using a triple bond as the carbene source without needing sacrificial phosphines.
The newly discovered light-driven gem hydrogenation of alkynes opens an unconventional yet efficient entry into five-coordinate Grubbs-type ruthenium carbene complexes with cis-disposed chloride ligands. Representatives of this class featuring a chelate substructure formed by an iodo-substituted benzylidene unit react with (substituted) 2-isopropoxystyrene to give prototypical second-generation Grubbs-Hoveyda complexes for olefin metathesis. The new approach to this venerable catalyst family is safe and versatile as it uses a triple bond rather than phenyldiazomethane as the ultimate carbene source and does not require any sacrificial phosphines.
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