Organometallics· 2026Q2
Hydrosilane-Free Access to Iridium-NNSi Catalysts via Activation of Unstrained Si–C Bonds for C(sp3)–H Borylation
- 1citations
- Q2SCImago
- 2026year
Short summary
Researchers achieved hydrosilane-free access to iridium–silyl species by cleaving unstrained Si–C bonds in pyridyl-based ligands, enabling the generation of Ir/NNSi catalysts with high activity for C(sp3)–H borylation at 80 °C.
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Key points
- Si–C bonds in pyridyl-based ligands were cleaved to access iridium–silyl species without hydrosilanes.
- The method generates organoboron compounds from silicon substituents (methyl, phenyl, ethyl).
- Optimized ligands and conditions facilitated efficient Si–C bond cleavage.
- Generated Ir/NNSi catalysts exhibit high activity for C(sp3)–H borylation at 80 °C.
AI-generated from the title and abstract; the full text is not read.
Abstract
Abstract Hydrosilane-free access to iridium–silyl species is achieved via cleavage of unstrained Si–C bonds within pyridyl-based ligand scaffolds. Treatment of (triorganosilyl)methyl-substituted 2,2′-bipyridine and 1,10-phenanthroline ligands with a tris(boryl)iridium complex induces Si–C bond cleavage, affording organoboron compounds derived from the substituents on silicon. Not only methyl and phenyl groups but also ethyl substituents undergo efficient cleavage upon optimization of the ligand structure and reaction conditions. This strategy enables the generation of Ir/NNSi catalysts bearing less sterically demanding silyl groups, which exhibit high catalytic activity for the C(sp3)–H borylation at 80 °C. These findings establish Si–C bond activation as a practical platform for accessing metal–silyl species from stable precursors and provide a basis for the design of silyl-based ligands for catalytic C–H functionalization.
The authors' abstract, as published at the source. Organometallics, 2026 · DOI ↗
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Field: Organic Chemistry
Organic ChemistryChemistry