A well-defined silica-supported tungsten oxo alkylidene is a highly active alkene metathesis catalyst. - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of the American Chemical Society Année : 2013

A well-defined silica-supported tungsten oxo alkylidene is a highly active alkene metathesis catalyst.

Résumé

Grafting (ArO)2W(═O)(═CHtBu) (ArO = 2,6-mesitylphenoxide) on partially dehydroxylated silica forms mostly [(≡SiO)W(═O)(═CHtBu)(OAr)] along with minor amounts of [(≡SiO)W(═O)(CH2tBu)(OAr)2] (20%), both fully characterized by elemental analysis and IR and NMR spectroscopies. The well-defined oxo alkylidene surface complex [(≡SiO)W(═O)(═CHtBu)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.

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Dates et versions

hal-00942164 , version 1 (04-02-2014)

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Matthew P Conley, Victor Mougel, Dmitry V Peryshkov, William P Forrest, David Gajan, et al.. A well-defined silica-supported tungsten oxo alkylidene is a highly active alkene metathesis catalyst.. Journal of the American Chemical Society, 2013, 135 (51), pp.19068-19070. ⟨10.1021/ja410052u⟩. ⟨hal-00942164⟩
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