Please use this identifier to cite or link to this item:
https://doi.org/10.1002/adsc.200800356
DC Field | Value | |
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dc.title | Benzimidazolium-pyrazole-palladium(II) complexes: New and efficient catalysts for Suzuki, Heck and Sonogashira reactions | |
dc.contributor.author | Li, F. | |
dc.contributor.author | Hor, T.S.A. | |
dc.date.accessioned | 2014-10-16T08:21:10Z | |
dc.date.available | 2014-10-16T08:21:10Z | |
dc.date.issued | 2008-10-06 | |
dc.identifier.citation | Li, F., Hor, T.S.A. (2008-10-06). Benzimidazolium-pyrazole-palladium(II) complexes: New and efficient catalysts for Suzuki, Heck and Sonogashira reactions. Advanced Synthesis and Catalysis 350 (14-15) : 2391-2400. ScholarBank@NUS Repository. https://doi.org/10.1002/adsc.200800356 | |
dc.identifier.issn | 16154150 | |
dc.identifier.uri | http://scholarbank.nus.edu.sg/handle/10635/93166 | |
dc.description.abstract | Three unsymmetrical benzimidazoliumpyrazole N-N ligands 2-(1-propylbenzimidazolylmethyl)-3,5-di-R-pyrazole (R=H, Me, t-Bu) have been conveniently prepared and structurally analyzed. The solid lattice packingof the R=Me compound at 223 K reveals one-dimensional "zig-zag" water chains stabilized by organic molecular channels through N⋯H-O and O-H⋯O bonding. These hybrid ligands add to palladium(II) to give high yields of air-stable complexes that are fully characterized by NMR, ESI, and X-ray single-crystal crystallography. They are active Suzuki catalysts at room temperature towards cross-couplingof unactivated aryl bromides and 5- or 6-membered heteroaryl bromides with arylboronic acids with turnover frequencies (TOF) reachingas high as 60,000 h-1. Their catalytic efficiency is significantly better than that of the C-N carbene-imidazole analogue. These catalysts are also active in Heck and Sonogashira cross-coupling reactions of aryl bromides giving the desired products in good yields. These results suggested that these Pd(II) complexes with N-based hybrid ligands are versatile and efficient catalysts for different types of cross-couplingreactio ns under aerobic conditions. © 2008 Wiley-VCH VerlagGmbH & Co. KGaA. | |
dc.description.uri | http://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1002/adsc.200800356 | |
dc.source | Scopus | |
dc.subject | Cross-coupling | |
dc.subject | Hybrid ligands | |
dc.subject | N-heterocyclic carbenes | |
dc.subject | Palladium | |
dc.subject | Water channel | |
dc.subject | X-ray structure determination | |
dc.type | Article | |
dc.contributor.department | CHEMISTRY | |
dc.description.doi | 10.1002/adsc.200800356 | |
dc.description.sourcetitle | Advanced Synthesis and Catalysis | |
dc.description.volume | 350 | |
dc.description.issue | 14-15 | |
dc.description.page | 2391-2400 | |
dc.description.coden | JPCHF | |
dc.identifier.isiut | 000260760700033 | |
Appears in Collections: | Staff Publications |
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