Effect of Ligand Bulk in Ruthenium-Catalyzed Olefin Metathesis: IPr* vs IPr

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• 作者：Simone Manzini ; C茅sar A. Urbina Blanco ; Alexandra M. Z. Slawin ; Steven P. Nolan
• 刊名：Organometallics
• 出版年：2012
• 出版时间：September 24, 2012
• 年：2012
• 卷：31
• 期：18
• 页码：6514-6517
• 全文大小：282K
• 年卷期：v.31,no.18(September 24, 2012)
• ISSN：1520-6041

文摘

Novel ruthenium catalysts, [RuCl₂(IPr*)(PPh₃)(3-phenylindenylidene)] (1) and [RuCl₂(IPr*)(Py)(3-phenylindenylidene)] (2), bearing the very bulky ligand IPr* are reported. The complexes were tested in ring closing and cross-metathesis, and their activities were compared to that displayed by [RuCl₂(IPr)(PPh₃)(3-phenylindenylidene)] (3) and the new [RuCl₂(IPr)(Py)(3-phenylindenylidene)] (4), in order to assess how the steric hindrance of the N-heterocyclic carbene influences the catalytic activity of the resulting ruthenium complexes.