Study of Oxidative Coupling by Ru(0) and Mechanistic Insight of the Selectivities

具有萘配体的零价钌络合物容易释放萘以产生6电子空位。 共轭化合物和取代的烯烃能够分别作为4-和2-π供体配位到空位。 因此，该催化剂通过供体电子清楚地识别这两种底物，并且可以实现交叉二聚化。 机理研究揭示了该偶联反应的氧化偶联机理。 利用这一机制的优点，我们已经成功地发展了立体选择性反应。

A zero-valent ruthenium complex having a naphthalene ligand readily releases the naphthalene to generate a 6-electron vacant site. A conjugated compound and a substituted alkene are able to coordinate to the vacant site as 4- and 2-pi donors, respectively. This catalyst therefore clearly recognizes these two substrates by the donor electrons and the cross-dimerization can be achieved. This mechanistic study reveals the oxidative coupling mechanism for present coupling reaction. To use the advantages of this mechanism, we have succeeded to develop the stereoselective reactions.