کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1328269 | 977559 | 2007 | 11 صفحه PDF | دانلود رایگان |
The synthesis and structural characterization of novel chelating N-aryl substituted palladium(II)–biscarbene-complexes is reported: 1,1′-bis(4-bromophenyl)-3,3′-methylene-diimidazoline-2,2′-diylidene-palladium(II)-dibromide, 1,1′-bis(4-methoxyphenyl)-3,3′-methylene-diimidazoline-2,2′-diylidene-palladium(II)-dibromide and 1,1′-bis(4-n-butoxyphenyl)-3,3′-methylenediimidazoline-2,2′-diylidene-palladium(II)-dibromide have been synthesized in good yields. The catalytic activity of these 1,1′-aryl-3,3′-methylenediimidazoline-2,2′-diylidene-palladium(II)-dihalogenide complexes was tested for the Mizoroki–Heck reaction in comparison to 1,1′-(bis)methyl-3,3′-methylenediimidazoline-2,2′-diylidene-palladium(II)-dihalogenide complexes and to 1,1′-bis(phenyl)-3,3′-methylene-diimidazoline-2,2′-diylidene-palladium(II)-dibromide. The activity of the aryl substituted catalysts is significantly higher compared to the methyl substituted NHC complexes. They also allow the coupling of arylchlorides with olefins.
The synthesis, structural characterization and catalytic application of novel bridged N-aryl substituted palladium(II)–biscarbenecomplexes in the Mizoroki–Heck reaction are reported. The activity of the investigated aryl substituted catalysts is significantly higher compared to the corresponding methyl substituted NHC complexes.Figure optionsDownload as PowerPoint slide
Journal: Journal of Organometallic Chemistry - Volume 692, Issue 7, 1 March 2007, Pages 1519–1529