Synthesis of 6H-isoindolo[2,1- a ]indol-6-ones via Pd-catalyzed cycloaminocarbonylation of 2 -(1H-indol-2-yl)phenyl tosylates with CO
作者:Bin Liu、Chunbo Lai、Chunlei Zhang、Xigeng Zhou
DOI:10.1016/j.tet.2017.12.058
日期:2018.2
2-(1H-indol-2-yl)benzamides are formed when an excess of amine is used in this reaction system. Alternatively, 2-(1H-indol-2-yl)benzamides can also be synthesized by the in situ aminolysis of 2. Furthermore, treatment of 2 with hydrosilane in the presence of KOH gave the unprecedented reducing products 2-(-1H-indol-2-yl)benzyl alcohols in 75–86% yields. These results demonstrate that 6H-isoindolo[2
钯催化开发了一种有效的制备取代的6H-异吲哚并[ 2,1 - a ]吲哚-6-酮(2)的有效方法,该取代的6H-isoindolo [ 2,1 - a ]吲哚-6-酮是大量天然存在的药理活性化合物的重要结构组分。的分子内cycloaminocarbonylation 2 - (1H-吲哚-2-基)苯基甲苯磺酸酯用CO值得注意的是,分子间氨基羰基化产物2 - (1H-吲哚-2-基)当过量的胺在该反应系统中使用形成的苯甲酰胺的。或者,还可以通过2的原位氨解来合成2-(1H-吲哚-2-基)苯甲酰胺。而且,治疗2在KOH的存在下与氢硅烷反应,以75-86%的收率得到了空前的还原产物2 -(-1H-吲哚-2-基)苄醇。这些结果证明6H-异吲哚并[2,1- a ]吲哚-6-酮是用于进一步合成加工的通用底物。