作者:Christian P. Lenges、Maurice Brookhart
DOI:10.1021/ja990702s
日期:1999.7.1
[C5Me5Rh(C2H3SiMe3)2], 1, has been shown to be a catalyst for the selective addition of olefins to the ortho position of aromatic ketones. The addition of vinyltrimethylsilane to benzophenone was studied by NMR spectroscopy, which indicated that 1 was the catalyst resting state for this process. This reaction was applied to a series of olefins (allyltrimethylsilane, 1-pentene, norbornene, 2,2‘-dimethyl-3-butene
铑双烯烃配合物 [C5Me5Rh(C2H3SiMe3)2], 1 已被证明是一种将烯烃选择性加成到芳族酮邻位的催化剂。通过核磁共振光谱研究了乙烯基三甲基硅烷添加到二苯甲酮中,这表明 1 是该过程的催化剂静止状态。该反应适用于一系列烯烃(烯丙基三甲基硅烷、1-戊烯、降冰片烯、2,2'-二甲基-3-丁烯、环戊烯和乙烯基乙醚)和芳族酮(二苯甲酮、4,4'-二甲氧基二苯甲酮、3 ,3'-双(三氟甲基)二苯甲酮、二苯并芴酮、苯乙酮、对氯苯乙酮和对(三氟甲基)苯乙酮)。研究了转换频率对底物浓度的依赖性。在过量酮的存在下形成二苯甲酮络合物,5,在消耗烯烃后观察到[(C5Me5Rh)2-η4-η4-C6H5C(O)Ph]。5. 加入烯烃后,活性催化剂再生。 根据动力学实验和标记...