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
确定了
镧系元素介导的顺序加
氢胺化/ CC环化反应的范围,以形成
三环和四环芳族氮杂环。探索了一系列的环大小以确定非对映选择性。还改变了芳环的电子特性,以确定其如何影响级联反应。结果发现,在苯并[一个
]喹嗪和
吡啶并[2,1,一个(> 20:1)具有最高的非对映选择性形成异吲环系统,而不管芳香环的电子特性。另外,形成具有2.3:1非对映异构体比率的四环
吲哚氮杂环。还提出了用于底物制备的新方法。