Control of the Regioselectivity in Cobalt- versus Ruthenium-Catalyzed Alder-ene Reaction of Unsymmetrical 1,3-Diynes
作者:Sebastian M. Weber、Gerhard Hilt
DOI:10.1021/acs.orglett.6b03729
日期:2017.2.3
The Alder-ene reaction of trialkylsilyl-substituted 1,3-butadiynes with terminal alkenes was investigated utilizing a cobalt-based catalyst, and the results were compared with Alder-ene rections catalyzed by the [CpRu(H3CCN)3]PF6 catalyst. Obviously, the two catalysts gave complementary results of yn-dienes differing in the site where the new carbon–carbon bond was formed. Of particular interest are
用钴基催化剂研究了三烷基甲硅烷基取代的1,3-丁二炔与末端烯烃的Alder-ene反应,并将其结果与[CpRu(H 3 CCN)3 ] PF 6催化的Alder-ene反应进行了比较。催化剂。显然,两种催化剂在不同的位置形成了新的碳-碳键,从而得到了二烯二烯的互补结果。特别令人感兴趣的是关于烯烃组分中双键迁移的观察结果。虽然简单的烯烃仅具有E-构型,但使用3-buten-1-ol可以得到相应的Z-双键,表明羟基充当与钴中心配位的供体,从而改变了反应途径。