Synthesis of 2,3-Dihydroindoles, Indoles, and Anilines by Transition Metal-Free Amination of Aryl Chlorides
作者:Matthias Beller、Claudia Breindl、Thomas H. Riermeier、Annegret Tillack
DOI:10.1021/jo001544m
日期:2001.2.1
and 3-chlorostyrene in the presence of potassium tert-butoxide to give N-substituted 2,3-dihydroindoles in good yields. The combination of this domino-amination protocol with a suitable dehydrogenation reaction gives access to pharmacologically interesting indoles in a one-pot procedure. Overall product yields of N-substituted indoles >50% are obtained by this method starting from commercially available
脂族和芳族胺在叔丁醇钾的存在下与2-和3-氯苯乙烯反应,以高收率得到N-取代的2,3-二氢吲哚。这种多米诺胺化方案与合适的脱氢反应的结合,使一锅操作即可获得药理学上有趣的吲哚。通过这种方法,从市售底物开始获得> 50%的N-取代的吲哚的总产物产率。除了芳族C-Cl键的分子内碱促进的胺化以外,还描述了芳族氯化物与伯胺和仲胺的无金属分子间胺化。使用叔丁醇钾作为碱可合成各种苯胺,收率良好至极佳。由于形成芳烃中间体,