Tandem Insertion of Halocarbenoids and Lithium Acetylides into Zirconacycles: A Novel Rearrangement to Zirconium Alkenylidenates by β-Addition to an Alkynyl Zirconocene
作者:Jozef Stec、Emma Thomas、Sally Dixon、Richard J. Whitby
DOI:10.1002/chem.201002962
日期:2011.4.18
Tandem insertion of 1,1‐dihalo‐1‐lithio species (halocarbenoids) and lithium alkynides into zirconacyclopentenes and zirconcyclopentanes affords carbocyclic products in high yields via an unusual rearrangement that probably involves addition of an organolithium species to the β‐position of a zirconium–alkyne complex to give an alkenylidene–zirconate species. A wide variety of cyclopentanoid organic
将1,1–二卤代1–硫代化合物(卤代类固醇)和炔属锂串联插入到氧化锆环戊烯和锆环戊烷中可以通过不寻常的重排提供高收率的碳环产物,该重排可能涉及将有机锂物种添加到锆的β位上。炔烃复合物,可得到烯基-锆酸酯。使用这种多组分偶联剂,可以高产率快速组装各种各样的环戊烷类有机结构。在某些情况下,主要的副反应是β-氢化物消除中间的环戊基或环戊烯基锆茂。