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Nickel(II) complexes of bidentate N-heterocyclic carbene/phosphine ligands: efficient catalysts for Suzuki coupling of aryl chlorides.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Lee, Chun Chin Chan, Kai-Ting Lai, Chun-Liang Hu, Ching-Han |
| Copyright Year | 2007 |
| Abstract | Nickel(II) complexes of bidentate N-heterocyclic carbene (NHC)/phosphane ligand L were prepared and structurally characterized. Unlike palladium, which forms [PdCl(2)(L)], the stable nickel product isolated is the ionic [Ni(L)(2)]Cl(2). These Ni(II) complexes are highly robust in air. Among different N-substituents on the ligand framework, the nickel complex of ligand L bearing N-1-naphthylmethyl groups (2 a) is a highly effective catalyst for Suzuki cross-coupling between phenylboronic acid and a range of aryl halides, including unreactive aryl chlorides. The activities of 2 a are largely superior to those of other reported nickel NHC complexes and their palladium counterparts. Unlike the previously reported [NiCl(2)(dppe)] (dppe=1,2-bis(diphenylphosphino)ethane), 2 a can effectively catalyze the cross-coupling reaction without the need for a catalytic amount of PPh(3), and this suggests that the PPh(2) functionality of hybrid NHC ligand L can partially take on the role of free PPh(3). However, for unreactive aryl chlorides at low catalyst loading, the presence of PPh(3) accelerates the reaction. |
| File Format | PDF HTM / HTML |
| DOI | 10.1002/chem.200600502 |
| Alternate Webpage(s) | http://www.chem.ccu.edu.tw/~joyce/referance/payfor/Chem.%20Eur.%20J/Chem.%20Eur.%20J.%202007,%2013,%20582-591.pdf |
| PubMed reference number | 16969780 |
| Alternate Webpage(s) | https://doi.org/10.1002/chem.200600502 |
| Journal | Medline |
| Volume Number | 13 |
| Issue Number | 2 |
| Journal | Chemistry |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
