Redox Cycling with Tellurium. Si−H Bond Activation by a Lewis Superacidic Tellurenyl Cation
The C,N-chelated aryltellurenyl triflate [2-(tBuNCH)C<sub>6</sub>H<sub>4</sub>Te][OTf] (1) activates the Si-H bonds in the tertiary silanes R<sub>3</sub>SiH via umpolung of H<sup>-</sup> to H<sup>+</sup> to give rise to the iminium salts (tBuN(H)CH)C<sub>6</sub>H<sub>4</sub>TeSiR<sub>3</sub>][OTf] (2<sup>R</sup>, R=Et, Ph (elusive) and R=Si(CH<sub>3</sub>)<sub>3</sub> isolated; OTf=O<sub>3</sub>SCF<sub>3</sub>) comprising Te-Si bonds, which are capable of generating silyl triflates, R<sub>3</sub>SiOTf, under attack of a second equivalent of 1. The unprecedented Si-H activation was utilized in main group redox catalysis using p-quinones, which were converted into (silylated) hydroquinones.
Authors
- Jens Beckmann (ORCID: https://orcid.org/0000-0002-8548-1821)
- Aleš Růžička (ORCID: https://orcid.org/0000-0001-8191-0273)
- Martin Hejda (ORCID: https://orcid.org/0000-0002-5780-0944)
- Emanuel Hupf (ORCID: https://orcid.org/0000-0003-0121-7554)
- Libor Dostál (ORCID: https://orcid.org/0000-0002-5982-1239)
Institutions
- University of Pardubice (CZ)
- University of Bremen (DE)
Publication Details
- Journal
- Chemistry - A European Journal
- Published
- 2024-10-28
- DOI
- https://doi.org/10.1002/chem.202403496
- Citations
- 4
- Primary Topic
- Organoselenium and organotellurium chemistry
- Type
- article
- Field-Weighted Citation Impact
- 1.40
Funders
- Grantová Agentura České Republiky