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Stable N-heterocyclic carbene (NHC)-palladium(0) complexes as active catalysts for olefin cyclopropanation reactions with ethyl diazoacetate

AuthorsMartín, Carmen; Molina, Francisco; Álvarez, Eleuterio ; Belderrain, Tomás R.
Issue Date2011
PublisherJohn Wiley & Sons
CitationChemistry - A European Journal 17: 14885- 14895 (2011)
AbstractThe Pd0 complexes [(NHC)PdLn] (NHC=N-heterocyclic carbene ligand; L=styrene for n=2 or PR3 for n=1) efficiently catalyse olefin cyclopropanation by using ethyl diazoacetate (EDA) as the carbene source with activities that improve on previously described catalytic systems based on this metal. Mechanistic studies have shown that all of these catalyst precursors deliver the same catalytic species in solution, that is, [(IPr)Pd(sty)], a 14e- unsaturated intermediate that further reacts with EDA to afford [(IPr)Pd(=CHCO2Et)(sty)], from which the cyclopropane is formed. © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Identifiersdoi: 10.1002/chem.201102900
issn: 0947-6539
Appears in Collections:(IIQ) Artículos
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