A Well-Defined Silica-Supported Tungsten Oxo Alkylidene Is a Highly Active Alkene Metathesis Catalyst

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• 作者：Matthew P. Conley ; Victor Mougel ; Dmitry V. Peryshkov ; William P. Forrest ; Jr. ; David Gajan ; Anne Lesage ; Lyndon Emsley ; Christophe Copéret ; Richard R. Schrock
• 刊名：Journal of the American Chemical Society
• 出版年：2013
• 出版时间：December 26, 2013
• 年：2013
• 卷：135
• 期：51
• 页码：19068-19070
• 全文大小：199K
• ISSN：1520-5126

文摘

Grafting (ArO)₂W(鈺怬)(鈺怌HtBu) (ArO = 2,6-mesitylphenoxide) on partially dehydroxylated silica forms mostly [(鈮iO)W(鈺怬)(鈺怌HtBu)(OAr)] along with minor amounts of [(鈮iO)W(鈺怬)(CH₂tBu)(OAr)₂] (20%), both fully characterized by elemental analysis and IR and NMR spectroscopies. The well-defined oxo alkylidene surface complex [(鈮iO)W(鈺怬)(鈺怌HtBu)OAr] is among the most active heterogeneous metathesis catalysts reported to date in the self-metathesis of cis-4-nonene and ethyl oleate, in sharp contrast to the classical heterogeneous catalysts based on WO₃/SiO₂.