Zirconocene-Induced Cocyclisation/Elimination Reactions of 2-Heterosubstituted 1,6-Dienes and 1,6-Enynes
作者:Richard J. Whitby、David R. Owen
DOI:10.1055/s-2005-870029
日期:——
Zirconocene-mediated cocyclisation of 2-heterosubstituted-1,6-dienes and -enynes gave zirconacycles bearing an endocyclic β-leaving group which eliminated under the reaction conditions to provide exocyclic alkylidene groups. The scope of this cyclisation/elimination has been investigated along with further elaboration of the monosubstituted zirconocene intermediates by insertion of alkenyl carbenoids.
锆烯催化的2-杂取代-1,6-二烯和-enynes的共环化反应生成了带有内环β-离去基团的锆环,该基团在反应条件下被消去,形成了外环烷基烯烃。该环化/消去反应的范围已被研究,同时还通过插入烯丙基羰基化合物进一步改进了单取代锆烯中间体。