کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1324899 | 977358 | 2011 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: CCC–N-heterocyclic carbene pincer complexes: Synthesis, characterization and hydroamination activity of a hafnium complex CCC–N-heterocyclic carbene pincer complexes: Synthesis, characterization and hydroamination activity of a hafnium complex](/preview/png/1324899.png)
Our methodology for the stoichiometric preparation of CCC–NHC pincer complexes of Zr has been extended to Hf. The CCCBu–NHC pincer Hf complex has been characterized by X-ray crystal structure analysis. Catalytic activity in the intramolecular hydroamination/cyclization of unactivated alkenes is reported and compared to the recently reported Zr analog. An improved, scaled-up CuO-catalyzed aryl amination of 1,3-dibromobenzene and an improved salt formation methodology for preparation of bis(butyl-imidazolium)benzene are reported also.
Our methodology for the stoichiometric preparation of CCC–NHC pincer complexes of Zr has been extended to Hf. Catalytic activity in the intramolecular hydroamination/cyclization of unactivated alkenes is reported and compared to the recently reported Zr analog.Figure optionsDownload as PowerPoint slideResearch highlights
► Large scale synthesis of the bis(imidazolium) salt CCCBu–NHC ligand precursor.
► Highly efficient synthesis of Hf CCC–NHC pincer complex with structural characterization.
► Catalytically active for hydroamination/cyclization yielding pyrrolidines and piperidines.
Journal: Journal of Organometallic Chemistry - Volume 696, Issue 1, 1 January 2011, Pages 373–377