Highly active, stable, and selective well-defined silica supported Mo imido olefin metathesis catalysts
Highly active, stable, and selective well-defined silica supported Mo imido olefin metathesis catalysts
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DOI：
10.1021/ja068249p
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发表时间：
2007-02-07
影响因子：
15
通讯作者：
Schrock, Richard. R.
中科院分区：
文献类型：
--
作者：
Blanc, Frederic;Thivolle-Cazat, Jean;Schrock, Richard. R.
通过质量平衡分析、红外光谱和核磁共振谱分析，将2 [Mo（NAr）（= CHCMe 2 R1）（NR 2）（2）]接枝到SiO2-（700）上，选择性地得到[（SiO）Mo（NAr）（= CHCMe 2 R1）（NR 2）]（1）。一个酰胺基由甲硅烷氧基基团从二氧化硅表面的取代显着增加的钼络合物在烯烃复分解反应的反应性，和剩余的酰胺基配体带来的稳定性和选择性的系统，证明了在丙烯的复分解反应中不形成1-丁烯和油酸乙酯的复分解反应获得的高周转。
Grafting 2 [Mo( NAr)(=CHCMe2R1)(NR2)(2)] on SiO2-(700) gives selectively [( SiO)Mo( NAr) (= CHCMe2R1)(NR2)] (1), according to mass balance analysis, IR, and NMR spectroscopies. The replacement of one amido group by a siloxy group from the surface of silica dramatically increased the reactivity of the Mo complex in olefin metathesis, and the remaining amido ligand brings stability and selectivity to the system as evidenced by the absence of formation of 1-butene in the metathesis of propene and the high turnovers obtained for the metathesis of ethyl oleate.