Iridium(I)-Catalyzed Intramolecular Hydrocarbonation of Alkenes: Efficient Access to Cyclic Systems Bearing Quaternary Stereocenters
作者:David F. Fernández、Moisés Gulías、José L. Mascareñas、Fernando López
DOI:10.1002/anie.201705105
日期:2017.8.1
wide variety of cyclic systems featuring methyl-substituted quaternary stereocenters is described. The method relies on the use of a cationic IrI–bisphosphine catalyst, which promotes a carboxamide-assisted activation of an olefinic C(sp2)−H bond followed by exo-cyclization to a tethered 1,1-disubstituted alkene. The extension of the method to aromatic and heteroaromatic C−H bonds, as well as developments
描述了一种催化,多功能且原子经济的CH功能化过程,该过程提供了多种以甲基取代的季位立体中心为特征的环状系统。该方法依赖于使用阳离子Ir I-双膦催化剂,该催化剂可促进羧酰胺辅助的烯烃C(sp 2)-H键的活化,然后外环化成束缚的1,1-二取代的烯烃。还介绍了该方法对芳族和杂芳族CH键的扩展以及对映选择性变体的开发。