Highly selective dimerization of Styrenes and linear co-dimerization of Styrenes with ethylene catalyzed by a ruthenium complex
Highly selective dimerization of Styrenes and linear co-dimerization of Styrenes with ethylene catalyzed by a ruthenium complex
复制标题
DOI：
10.1002/anie.200701583
复制
发表时间：
2007-01-01
影响因子：
16.6
通讯作者：
Mitsudo, Take-aki
中科院分区：
文献类型：
--
作者：
Kondo, Teruyuki;Takagi, Daisuke;Mitsudo, Take-aki
烯烃的均二聚和共二聚是制备高级烯烃的重要方法，高级烯烃是新型聚合物、润滑剂、洗涤剂和许多其他有用化学品的来源。[1]由于对原子效率有机合成的需求，即起始材料中的所有原子都被引入到产物中（100%原子经济性），最近相当多的注意力集中在这些反应上。[2]第一过渡金属配合物被证明可以催化苯乙烯的均二聚反应，是基于钯的。[3]后来，镍[4]和锆[5]基催化剂体系被证明对这种二聚反应是有效的，并且这些通常产生头-尾二聚体，即（E）-1，3-二芳基-1-丁烯。以前只有一个头对头二聚反应得到（E）-1，4-二芳基-1-丁烯的例子：Kretschmer埃塔尔。[6]报道了使用双（茚基）氢化钇作为催化剂得到这样的二聚反应。然而，它们的催化剂对空气和水分不稳定。
The homo-and co-dimerization of alkenes are important methods for generating higher alkenes, which are a source of new kinds of polymers, lubricants, detergents, and many other useful chemicals.[1] Considerable attention has recently been focused on these reactions, because of the demand for atomefficient organic syntheses, that is, all of the atoms in the starting materials are incorporated into the products (100% atom economy).[2]The first transition-metal complexes that were shown to catalyze the homo-dimerization of styrenes were based on palladium.[3] Later, nickel-[4] and zirconium-based [5] catalyst systems were shown to be effective for this dimerization reaction, and these generally gave head-to-tail dimers, namely (E)-1, 3-diaryl-1-butenes. There has been only one previous example of head-to-head dimerization to give (E)-1, 4-diaryl-1-butene: Kretschmer etal.[6] reported that the use of a bis (indenyl) yttrium hydride as the catalyst gave such a dimerization. However, their catalyst is unstable towards air and moisture.