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- Title
Cobalt Boryl Complexes: Enabling and Exploiting Migratory Insertion in Base-Metal-Mediated Borylation.
- Authors
Frank, René; Howell, James; Campos, Jésus; Tirfoin, Rémi; Phillips, Nicholas; Zahn, Stefan; Mingos, D. Michael P.; Aldridge, Simon
- Abstract
Cobalt boryl complexes, which have only been sporadically reported, can be accessed systematically with remarkable (but controllable) variation in the nature of the MB bond. Complexes incorporating a very strong trans σ-donor display unparalleled inertness, reflected in retention of the MB bond even in the presence of extremely strong acid. By contrast, the use of the strong π-acceptor CO in the trans position, results in significant CoB elongation and to labilization of the boryl ligand via unprecedented CO migratory insertion. Such chemistry provides a pathway for the generation of coordinative unsaturation, thereby enabling ligand substitution and/or substrate assimilation. Alkene functionalization by boryl transfer, a well-known reaction for noble metals such as Rh or Pt, can thus be effected by an 18-electron base-metal complex.
- Subjects
COBALT; METAL complexes; CHEMICAL bonds; MIGRATION reactions (Chemistry); ALKENES
- Publication
Angewandte Chemie International Edition, 2015, Vol 54, Issue 33, p9586
- ISSN
1433-7851
- Publication type
Article
- DOI
10.1002/anie.201504929