Polyisobutylene-anchored N-heterocyclic carbene ligands.
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The synthesis of polyisobutylene (PIB)-supported N-heterocyclic carbenes (NHCs) that are useful as ligands for recoverable/recyclable organometallic complexes is described. Both PIB-bound carbenes analogous to SIMes and IMes as well as carbene precursors bound to PIB via 1,2,3-triazoles by alkyne-azide couplings are described. Both Ag(I) and Ru(II) complexes of these carbenes are shown to be phase selectively soluble in heptane. Hoveyda-Grubbs second-generation catalysts containing a PIB-supported NHC have also been used to catalyze ring-closing metathesis.
author list (cited authors)
Hongfa, C., Su, H., Bazzi, H. S., & Bergbreiter, D. E.
complete list of authors
Hongfa, Chayanant||Su, Haw-Lih||Bazzi, Hassan S||Bergbreiter, David E