Catalytic cycloisomerization of enynes has been accomplished in the presence of an Ni0-PPh3-Zn-carboxylic acid or -ZnCl2 system. A nickel(I)-hydride complex, thought to be generated by reduction of the protonated nickel(II) complex with Zn, is proposed as the catalytic species. This cycloisomerization shows reactivity behavior that is different from that of a conventional metal-catalyzed reaction. In particular
Nickel-catalyzed coupling of allyl chlorides and enynes
作者:Shin-ichi Ikeda、Kaori Suzuki、Kazunori Odashima
DOI:10.1039/b515508h
日期:——
The Ni-catalyzed coupling of allyl chlorides and enynes has been developed; the cyclization of enynes was triggered by the addition of π-allylnickel species to the alkyne part, followed by the incorporation of the alkene part.