Lanthanide-Catalyzed Tandem Insertion of Secondary Amines with 2-Alkynylbenzonitriles: Synthesis of Aminoisoindoles
作者:Pengqing Ye、Yinlin Shao、Leping Xie、Keting Shen、Tianxing Cheng、Jiuxi Chen
DOI:10.1002/asia.201801252
日期:2018.12.4
A lanthanide‐catalyzed intermolecular hydroamination of 2‐alkynylbenzonitriles with secondary amines has been disclosed, providing a streamlined access to a range of aminoisoindoles in moderate to excellent yields. The salient features of this reaction include high bond‐formation efficiency, mild reaction conditions, 100 % atomic efficiency and good functional group tolerance. This methodology has
已公开了用仲胺进行镧系元素催化的2-炔基苄腈的分子间加氢胺化反应,以中等到极好的收率,可以轻松地获得一系列氨基异吲哚。该反应的显着特征包括高键形成效率,温和的反应条件,100%的原子效率和良好的官能团耐受性。该方法也已成功应用于其他含氮化合物的构建,例如5 H咪唑并[2,1- a]。异吲哚和异喹啉。提出了一种可能的机制,用于形成氨基异吲哚,涉及通过镧系元素络合物的初始NH活化,然后将C≡N插入Ln-N键以形成to基镧系元素中间体,然后将其环化。