Determining the scope of the lanthanide mediated, sequential hydroamination/C–C cyclization reaction: formation of tricyclic and tetracyclic aromatic nitrogen heterocycles
作者:Gary A. Molander、Shawn K. Pack
DOI:10.1016/j.tet.2003.08.071
日期:2003.12
also varied to determine how it affected the cascade reaction. It was found that the benzo[a]quinolizine and the pyrido[2,1,a]isoindolizine ring systems formed with the highest diastereoselectivity (>20:1), regardless of the electronic characteristics of the aromatic ring. Additionally, a tetracyclic indole nitrogen heterocycle was formed with a 2.3:1 diastereomeric ratio. A novel procedure for substrate