We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Reversible C−H Activation, Facile C−B/B−H Metathesis and Apparent Hydroboration Catalysis by a Dimethylxanthene‐Based Frustrated Lewis Pair.
- Authors
Vasko, Petra; Zulkifly, Ili A.; Fuentes, M. Ángeles; Mo, Zhenbo; Hicks, Jamie; Kamer, Paul C. J.; Aldridge, Simon
- Abstract
Abstract: A dimethylxanthene‐based phosphine/borane frustrated Lewis pair (FLP) is shown to effect reversible C−H activation, cleaving phenylacetylene, PhCCH, to give an equilibrium mixture of the free FLP and phosphonium acetylide in CD2Cl2 solution at room temperature. This system also reacts with B−H bonds although in a different fashion: reactions with HBpin and HBcat proceed via C−B/B−H metathesis, leading to replacement of the ‐B(C6F5)2 Lewis acid component by ‐Bpin/‐Bcat, and transfer of HB(C6F5)2 to the phosphine Lewis base. This transformation underpins the ability of the FLP to catalyze the hydroboration of alkynes by HBpin: the active species is derived from the HB(C6F5)2 fragment generated in this exchange process.
- Subjects
HYDROBORATION; LEWIS pairs (Chemistry); METATHESIS reactions; ALKYNES; NUCLEAR magnetic resonance spectroscopy
- Publication
Chemistry - A European Journal, 2018, Vol 24, Issue 41, p10531
- ISSN
0947-6539
- Publication type
Article
- DOI
10.1002/chem.201801871