Nickel-Catalyzed Intermolecular [2 + 2] Cycloaddition of Conjugated Enynes with Alkenes
作者:Akira Nishimura、Masato Ohashi、Sensuke Ogoshi
DOI:10.1021/ja3074775
日期:2012.9.26
A nickel-catalyzed intermolecular [2 + 2] cycloaddition of conjugated enynes with alkenes has been developed. A variety of electron-deficient alkenes as well as electronically neutral norbornene and 1-decene were applicable to this reaction. The use of conjugated enynes circumvented possible side rections, such as oligomerizations and cyclotrimerizations. The isolation of reaction intermediate complexes
已开发出镍催化的共轭烯炔与烯烃的分子间 [2 + 2] 环加成反应。各种缺电子烯烃以及电子中性的降冰片烯和1-癸烯都适用于该反应。共轭烯炔的使用避免了可能的副反应,例如低聚和环三聚。反应中间体配合物的分离表明,η(3)-丁二烯基配位是选择性形成环丁烯的关键。