Selective synthesis of α-methylenyl zirconacyclopentene via cross-coupling of alkyne and allene
作者:Weixin Zheng、Yangfeng Wu、Fenfen Zheng、Linfeng Hu、Ya Hong
DOI:10.1016/j.tetlet.2010.06.134
日期:2010.9
alpha-Methylenyl zirconacyclopentenes are synthesized regio- and stereoselectively via reductive intermolecular cross-coupling of alkynes and allenes promoted by zirconocene species 'Cp2Zr'. An interesting reductive intramolecular coupling of the alpha-methylenyl zirconacyclopentene has been observed in the presence of DMAD/CuCl, resulting in the generation of cyclobutene with an exocyclic double bond. Polysubstituted 1,4-dienes can be given with high selectivity and good yields. (C) 2010 Elsevier Ltd. All rights reserved.