Carbon−Carbon Bond Formation by Electrophilic Addition at the Central Carbon of the μ-η<sup>3</sup>-Allenyl/Propargyl Ligand on the Pd−Pd Bond
作者:Sensuke Ogoshi、Takuma Nishida、Ken Tsutsumi、Motohiro Ooi、Tsutomu Shinagawa、Tenpei Akasaka、Mariko Yamane、Hideo Kurosawa
DOI:10.1021/ja003754m
日期:2001.4.1
HCl or AcCl, at the central carbon of the mu-eta(3)-allenyl/propargyl ligand to give the mu-eta(3)-vinylcarbenedipalladium complexes. Intramolecular reaction proceeded smoothly to give cyclization products quantitatively. Addition of a catalytic amount of a palladium(0) complex dramatically accelerated the carbon-carbon bond formation. The MO calculations on the mu-eta(3)-allenyl/propargyl complexes indicated
mu-eta(3)-allenyl/propargyldipalladium 配合物是通过相应的eta(1)-allenyl-或eta(1)-propargylpalladium 配合物与Pd(2)(dba)(3) 反应合成的。X射线衍射分析表明,该双核配合物具有独特的结构,其中两个钯、三个碳、两个磷和一个卤原子在同一平面上。这些双核配合物与亲电子试剂(例如 HCl 或 AcCl)在 mu-eta(3)-烯丙基/炔丙基配体的中心碳上反应,生成 mu-eta(3)-乙烯基碳烯二钯配合物。分子内反应顺利进行,定量得到环化产物。添加催化量的钯(0)络合物显着加速了碳-碳键的形成。