A ruthenium-based catalytic system with switchable selectivity between cyclotrimerization and enyne metathesis/Diels–Alder reactions of terminal alkynes
作者:Solmaz Karabulut、Begüm Sariaslan、Bengi Özgün Öztürk
DOI:10.1016/j.catcom.2013.06.023
日期:2013.11
cyclotrimerization and cross enyne metathesis. The cyclotrimerization reaction of phenylacetylene catalyzed by [RuCl2(p-cymene)]2 can be switched to enyne metathesis by the introduction of a sterically hindered N-heterocyclic carbene. The 1,3-diene formed during this reaction reacts with dienophiles to form the Diels–Alder adduct. A practical one-pot synthesis method, utilizing enyne metathesis/Diels–Alder reactions
在这项研究中,我们报告了一个实用的催化体系[RuCl 2(p- cymene )] 2 / IPr(IPr:1,3-双(2,6二异丙基苯基)咪唑-2-亚甲基),可以在环三聚反应和跨烯炔复分解。通过引入空间受阻的N-杂环卡宾,可以将[RuCl 2(p-cymene)] 2催化的苯乙炔的环三聚反应转变为烯炔复分解。在此反应过程中形成的1,3-二烯与亲二烯体反应形成Diels-Alder加合物。一种实用的一锅合成方法,利用烯炔复分解/ Diels-Alder反应,以有效的方式构建环状化合物。