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http://ir.ncue.edu.tw/ir/handle/987654321/18979
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| Title: | Direct C5-Arylation Reaction between Imidazoles and Aryl Chlorides Catalyzed by Palladium Complexes with Phosphines and N-Heterocyclic Carbenes |
| Authors: | P. Vijaya Kumar;Lin, Wu-Shien;Shen, Jiun-Shian;Debkumar Nandi;Lee, Hon Man |
| Contributors: | 化學系 |
| Date: | 2011-09
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| Issue Date: | 2014-08-14T04:30:32Z
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| Publisher: | American Chemical Society |
| Abstract: | Palladium(II) acetate complexes bearing phosphines and carbene ligands, Pd(L)(PR3)(OAc)2 (1a, R = Ph; 1b, R = Cy; L = 1,3-dibenzylimidazol-2-ylidene), were prepared by salt metathesis reactions of their chloro complexes with AgOAc in good yields. The electron-rich 1b was efficient in catalyzing C-5 direct arylation of imidazoles with aryl halides. Most significantly, the catalytic system allows a range of aryl chlorides as substrates. Microwave irradiation effectively promotes the reactions, with good yields obtainable in only 2 h. In combination with the classical method of C–C bond formation reactions, novel imidazole derivatives featuring biaryl and styryl subunits were successfully obtained from 1,4-dichlorobenzene and 1-bromo-4-chlorobenzene. |
| Relation: | Organometallics, 30(19): 5160-5169 |
| Appears in Collections: | [化學系] 期刊論文
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