Group 11 Metal Amide-Catalyzed Asymmetric Cycloaddition Reactions of Azomethine Imines with Terminal Alkynes
作者:Takaki Imaizumi、Yasuhiro Yamashita、Shu̅ Kobayashi
DOI:10.1021/ja311150n
日期:2012.12.12
We developed a 1,3-dipolar cycloaddition reaction of azomethine imines with terminal alkynes catalyzed by group 11 metal amides to provide N,N-bicyclic pyrazolidinone derivatives. This reaction afforded the cycloadducts in a unique 5,7-disubstituted manner. Furthermore, we succeeded in applying this catalysis to asymmetric reactions, and the desired heterocycles were produced in high yields with exclusive
我们开发了由 11 族金属酰胺催化的偶氮甲碱亚胺与末端炔烃的 1,3-偶极环加成反应,以提供 N,N-双环吡唑烷酮衍生物。该反应以独特的 5,7-二取代方式提供环加合物。此外,我们成功地将这种催化应用于不对称反应,并以高产率生产了所需的杂环,具有独特的区域选择性和高对映选择性。机理研究阐明了决定区域选择性的逐步反应途径和关键特征。