Indenylidene‐Ruthenium Complexes Bearing Saturated N‐Heterocyclic Carbenes: Synthesis and Catalytic Investigation in Olefin Metathesis Reactions
作者:Stijn Monsaert、Renata Drozdzak、Valerian Dragutan、Ileana Dragutan、Francis Verpoort
DOI:10.1002/ejic.200700879
日期:2008.1
and the ring-closing metathesis of diethyl diallylmalonate. Comparison with the corresponding benzylidene-containing catalysts, 1a,c and 8b, established the decisive role of the carbene ligand on the procedure of the reaction and led to the observation of an unusual catalytic phenomenon, here called “self-inhibition”.(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)
从 Cl2Ru(PR3)2 合成通式 Cl2Ru(SIMes)(L)(3-phenylinden-1-ylidene)(5,L = PCy3;6,L = py;和 7,L = PPh3)的配合物报道了 (3-苯基茚-1-亚基) (2a, R = Ph; 2b, R = Cy)。该系列烯烃复分解催化剂已得到充分表征(1H、13C 和 31P NMR 光谱和元素分析),并在 1,5-环辛二烯的开环复分解聚合和二烯丙基丙二酸二乙酯的闭环复分解中具有出色的活性。与相应的含亚苄基催化剂 1a、c 和 8b 进行比较,确定了卡宾配体对反应过程的决定性作用,并导致观察到一种不寻常的催化现象,这里称为“自抑制”。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)