Carbon−Carbon Bond Formation Reaction of Zirconacyclopentadienes with Alkynes in the Presence of Ni(II)-complexes
作者:Tamotsu Takahashi、Fu-Yu Tsai、Yanzhong Li、Kiyohiko Nakajima、Martin Kotora
DOI:10.1021/ja990750c
日期:1999.12.1
tetrahydroisoquinoline derivatives in good to high yields. This procedure was also used for the selective preparation of benzene derivatives from three different alkynes. The use of trimethylsilyl-substituted alkyne as the first, second or third alkyne afforded desilylated benzene derivatives. The reaction of zirconacyclopentadienes with allenes gave benzene derivatives as a mixture of two isomers.
由两个炔烃或二炔制备的氧化锆环戊二烯与烷基、三甲基甲硅烷基或烷氧基取代的第三炔以及具有吸电子基团的炔在化学计量的 NiBr2(PPh3)2 存在下反应,得到以良好的收率得到苯衍生物。含杂原子的二炔如二炔丙基苄胺和炔丙基-高炔丙基苄胺以良好至高产率得到异二氢吲哚和四氢异喹啉衍生物。该程序还用于从三种不同的炔烃中选择性制备苯衍生物。使用三甲基甲硅烷基取代的炔作为第一、第二或第三炔提供去甲硅烷基化的苯衍生物。锆并环戊二烯与丙二烯的反应得到苯衍生物,为两种异构体的混合物。