Reaction paths and mechanisms in the catalytic cycloaddition of allene over nickel(0) template systems
作者:Sei Otsuka、Kazuhide Tani、Tsuneaki Yamagata
DOI:10.1039/dt9730002491
日期:——
Catalytic cycloadditions of allene, CH2CCH2, have been effected with a variety of nickel(0)–phosphorus ligand systems. The selective catalytic reaction path leading to the cyclotetramer, cyclotetramer, or cyclopentamer depends primarily on the nature of the ligands. Intermediate nickel(0) complexes containing the linear trimer (C9H12) or tetramer (C12H16) have been detected spectroscopically or isolated
艾伦(CH 2 C CH 2)的催化环加成反应已通过多种镍(0)-磷配体系统实现。导致环四聚体,环四聚体或环戊二烯的选择性催化反应路径主要取决于配体的性质。包含线性三聚体(C 9 H 12)或四聚体(C 12 H 16)的中间体镍(0)配合物)已通过光谱检测或通过磷配体稳定化分离。基于分离的配合物的结构和动力学,描述了多步反应路径,并讨论了磷配体在这些催化剂中的作用。