Cationic Palladium Complex-Catalyzed Cyclization-Hydrosilylation of 1,6-Heptadiyne and its Homologs
作者:Keiji Yamamoto、Takanori Uno、Shigeru Wakayanagi、Yoshiya Sonoda
DOI:10.1055/s-2003-41494
日期:——
Palladium complex (A)-catalyzed dimerization-hydro-silylation of 1-alkynes, which has previously been reported, can not be applied effectively to the intramolecular version of α,Ï-alkanediynes, while a cationic palladium complex (B) is a very effective catalyst for cyclization-hydrosilylation of functionalized α,Ï-diynes to give (Z)-1-methylene-2-silylmethylenecycloalkane derivatives, with 5-, 6-, and 7-membered ring, in good to moderate yields.
钯配合物(A)催化1-炔烃的二聚氢硅化反应先前已有报道,但该方法不能有效地应用于α,ω-炔烃的分子内版本。相反,阳离子钯配合物(B)是一种非常有效的催化剂,能实现功能化α,ω-二炔的环化氢硅化反应,以良好至中等的产率得到(Z)-1-亚甲基-2-硅亚甲基环烷烃衍生物,环系包括5元、6元和7元环。