Divergent synthesis of 6H-isoindolo[2,1-a]indol-6-ones and indenoindolones: an investigation of Pd-catalyzed isocyanide insertion
摘要:
A novel Pd-catalyzed intramolecular cyclization via tert-butyl isocyanide insertion from 2-(2-bromophenyl)-1H-indoles has been developed, which demonstrates the utility of isocyanides in C-N or C-C bond construction. Treatment of 2-(2-bromophenyl)-1H-indoles with tert-butyl isocyanide affords 6H-isoindolo[2,1-a]indol-6-ones with high efficiency. However, N-methyl or N-Boc protected 2-(2-bromophenyl)-1H-indoles gives indenoindolones in excellent yields under the same condition, which reveals that under the described situation, isocyanides insertion for the formation of C-N bonds is prior to that of C-C bonds. (C) 2014 Elsevier Ltd. All rights reserved.
Synthesis of Indolo[2,1-a]isoquinolines via Copper-Catalyzed C–C Coupling and Cyclization of 2-(2-Bromoaryl)-1H-indoles with 1,3-Diketones
作者:Chan Cho、Ha Lee、Pham Dao、Young-su Kim
DOI:10.1055/s-0036-1591589
日期:2018.8
Abstract 2-(2-Bromoaryl)-1H-indoles are coupled and cyclized with 1,3-diketones by microwave irradiation in DMF in the presence of a catalytic amount of copper(I) iodide along with a base to afford the corresponding indolo[2,1-a]isoquinolines in moderate to good yields. 2-(2-Bromoaryl)-1H-indoles are coupled and cyclized with 1,3-diketones by microwave irradiation in DMF in the presence of a catalytic
摘要 通过在催化量的碘化亚铜(I)和碱存在下,在DMF中微波辐射,将2-(2-溴芳基)-1 H-吲哚偶联并与1,3-二酮环合,得到相应的吲哚[ 2,1- a ]异喹啉的产量中等至良好。 通过在催化量的碘化亚铜(I)和碱存在下,在DMF中微波辐射,将2-(2-溴芳基)-1 H-吲哚偶联并与1,3-二酮环合,得到相应的吲哚[ 2,1- a ]异喹啉的产量中等至良好。
Pd-Catalyzed Cyclocarbonylation of 2-(2-Bromoaryl)indoles with CO as a C1 Source: Selective Access to 6 <i>H</i>-Isoindolo[2,1-<i>a</i>]indol-6-ones and Indeno[1,2-<i>b</i>]indol-10(5 <i>H</i>)-ones
作者:Shenghai Guo、Li Tao、Fang Wang、Xuesen Fan
DOI:10.1002/asia.201601067
日期:2016.11.7
A highly efficient and regioselectivesyntheticroute to 6 H‐isoindolo[2,1‐a]indol‐6‐ones and indeno[1,2‐b]indol‐10(5 H)‐ones through the Pd‐catalyzed cyclocarbonylation of 2‐(2‐bromoaryl)indoles under atmospheric CO pressure has been achieved. Notably, the regioselectivity of the reaction was exclusively dependent on the structural characteristics of the indole substrates. With N‐unsubstituted indoles
通过2的Pd催化环羰基化反应制得6 H-异吲哚并[2,1- a ]吲哚-6-和茚并[1,2 - b ] indol-10(5 H)-1的高效且区域选择性的合成途径 在大气压CO压力下获得了(2-溴芳基)吲哚。值得注意的是,反应的区域选择性仅取决于吲哚底物的结构特征。以N-未取代的吲哚为起始原料,该反应获得了6 H-异吲哚并[2,1 - a ]吲哚-6-酮,收率为优良。另一方面,以N-取代的吲哚为底物,反应得到茚并[1,2 - b ] indol-10(5 H)-以高度区域选择性的方式进行。
Copper-Catalyzed Synthesis of Trinuclear N-Fused Hybrid Scaffolds by Double C(<i>sp</i>
<sup>2</sup>
)-N Bond Formation between 2-(2-Bromoaryl)indoles and 2-Aminoazoles
作者:Thi Duyen Diep、Pham Duy Quang Dao、Son Long Ho、Chan Sik Cho
DOI:10.1002/ejoc.202000238
日期:2020.5.22
for indole‐quinazoline‐benzimidazole and indole‐quinazoline‐imidazole trinuclear N‐fused hybridscaffolds has been developed by copper‐catalyzed C(sp2)‐N coupling and cyclization of 2‐(2‐bromoaryl)indoles with 2‐aminoazoles as newbuildingblocks. Further challenges on the construction of polynuclear N‐fused hybridscaffoldsusing 2‐aminoazoles are expected.