the head-to-head cyclodimerization products, bismethylenecyclobutanes, as single isomers in good to fair yields. We also carried out the stoichiometric reaction of these allenes in the presence of Ni(0) complexes and elucidated the mechanism of this highly selective reaction.
镍催化的缺电子
丙二烯的 [2 + 2] 环化在非常温和的条件下以高度区域选择性的方式有效进行,得到头对头的环二聚产物,双
亚甲基环丁烷,作为单一异构体,产率良好至一般。我们还在 Ni(0) 配合物存在下进行了这些
丙二烯的
化学计量反应,并阐明了这种高选择性反应的机制。