Please use this identifier to cite or link to this item: https://doi.org/10.1021/om7009107
Title: Palladium(II) pyrazolin-4-ylidenes: Remote N-heterocyclic carbene complexes and their catalytic application in aqueous Suzuki-Miyaura coupling
Authors: Han, Y. 
Huynh, H.V. 
Tan, G.K.
Issue Date: 17-Dec-2007
Citation: Han, Y., Huynh, H.V., Tan, G.K. (2007-12-17). Palladium(II) pyrazolin-4-ylidenes: Remote N-heterocyclic carbene complexes and their catalytic application in aqueous Suzuki-Miyaura coupling. Organometallics 26 (26) : 6581-6585. ScholarBank@NUS Repository. https://doi.org/10.1021/om7009107
Abstract: Two monocationic complexes of pyrazole-derived remote carbene ligands of the type trans-[PdI(rNHC)(PPh3)2]+OTf - {rNHC = 2-ethyl-3,5-dim -1-phenylpyrazolin-4-ylidene (6a), 1-ethyl-2,3,5-trimethylpyrazolin-4-ylidene (6b)} were prepared by oxidative addition of 4-iodo-1,2,3,5-tetrasubstituted pyrazolium triflate salts to [Pd2(dba)3]/PPh3 in good yields. Both compounds were fully characterized by multinuclei NMR spectroscopies, electrospray ionization mass spectrometry, and X-ray diffraction analysis. A comparative study on the aqueous Suzuki-Miyaura catalytic activities of these cationic complexes with their previously reported neutral counterparts reveals the superiority of the former. © 2007 American Chemical Society.
Source Title: Organometallics
URI: http://scholarbank.nus.edu.sg/handle/10635/94478
ISSN: 02767333
DOI: 10.1021/om7009107
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