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- Bielawski, Christopher W.
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N-heterocyclic carbenes: deducing sigma- and pi-contributions in Rh-catalyzed hydroboration and Pd-catalyzed coupling reactions
- Author(s)
- Khramov, Dimitri M., Rosen, Evelyn L., Er, Joyce An., Vu, Peter D., Lynch, Vincent M., Bielawski, Christopher W.
- Issued Date
- 2008-07
- Citation
- TETRAHEDRON, v.64, no.29, pp.6853 - 6862
- Abstract
- The effect of tuning the electronic properties of N-heterocyclic carbene (NHC) ligands was evaluated in multiple, mechanistically distinct, metal-mediated reactions. Hydroboration and Heck reactions, catalyzed by Rh-NHC and Pd-NHC complexes, respectively, were found to result in yields that were up to ten times lower when pi-withdrawing substituents were incorporated into the NHC backbone relative to analogues bearing sigma-withdrawing groups.
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- ISSN
- 0040-4020
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