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Kolekcje
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Structure, dynamics and catalytic activity of palladium(II) complexes with imidazole ligands.
Autorzy
Rok wydania
2010
Czasopismo
Numer woluminu
363
Strony
4346-4354
DOI
10.1016/j.ica.2010.08.037
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
Several palladium complexes of the type [Pd(im)2Cl2], [Pd(im)3Cl]Cl, and [Pd(im)4]Cl2 (im = imidazole 1, 1-methylimidazole 2, 1,2-dimethylimidazole 3, 1-butylimidazole 4, 4a, 1-phenylimidazole 6, 1-phenylimidazoline 7, and 1-methylimidazoline 8) were prepared and structurally characterized. The square planar structure of two new complexes with the composition [Pd(im)4]Cl2 (2b, 4b) was confirmed by X-ray analysis. In solution, exchange of imidazole ligands leading to heteroleptic products was evidenced by ESI-MS studies. Two bis-ligated complexes, bearing 1-methylimidazole (2a) and 1-propoxymethylimidazole (5) ligands, were obtained in the reaction of palladium with imidazoles formed by deprotection of one nitrogen atom in the respective imidazolium halides. Catalytic Suzuki–Miyaura reactions were carried out using the obtained palladium complexes in isopropanol–water solution. High yields of the cross-coupling products were obtained at 40 and 60 °C when 2-bromotoluene, 4-bromotoluene, and 4-bromoanizole were used as substrates.
Słowa kluczowe
palladium, imidazole, imidazoline, ESI-MS studies, Suzuki–Miyaura reaction
Adres publiczny
https://doi.org/10.1016/j.ica.2010.08.037
Strona internetowa wydawcy
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