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.
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.
Regioselective Synthesis of Indolo[1,2-<i>c</i>]quinazolines and 11<i>H</i>-Indolo[3,2-<i>c</i>]quinolines via Copper-Catalyzed Cascade Reactions of 2-(2-Bromoaryl)-1<i>H</i>-indoles with Aldehydes and Aqueous Ammonia
作者:Shenghai Guo、Li Tao、Wenwen Zhang、Xinying Zhang、Xuesen Fan
DOI:10.1021/acs.joc.5b02076
日期:2015.11.6
synthesis of indolo[1,2-c]quinazolines and 11H-indolo[3,2-c]quinolines through copper-catalyzed one-pot cascade reactions of 2-(2-bromoaryl)-1H-indoles with aldehydes and aqueous ammonia has been achieved. Notably, the regioselectivity was easily controlled by tuning the reaction conditions. Compared with literature methods, the present protocol features easily controlled selectivity, readily available starting
吲哚并[1,2-的高度选择性和方便合成Ç ]喹唑啉和11 ħ吲哚并[3,2- c ^ ]喹啉通过铜催化一锅级联反应的2-(2-溴代)-1 ħ -indoles醛和氨水已实现。值得注意的是,通过调节反应条件可以容易地控制区域选择性。与文献方法相比,本方案的特点是易于控制的选择性,易于获得的起始原料,良好的官能团耐受性和简单的操作程序。
Synthesis of benzo[4,5]imidazo[1,2‐
<i>a</i>
]indolo[1,2‐
<i>c</i>
]quinazolines from 2‐(2‐bromoaryl)indoles and 2‐methoxybenzimidazoles under recyclable magnetic MOF‐199 catalysis
作者:Min Jeong Kim、Seong Weon Lee、Pham Duy Quang Dao、Chan Sik Cho
DOI:10.1002/aoc.6871
日期:2022.11
substituents at 3-position of indole moiety. A reaction pathway involving a copper-catalyzed Ullmann-type C (sp2)-N coupling and an addition-elimination nucleophilic aromatic substitution via Meisenheimercomplex followed by cyclocondensation is proposed for this catalytic process. The Fe3O4@SiO2@MOF-199 catalyst could be recovered and reused several times without any change of catalytic activity.
在催化量的可回收 Fe 3 O 4 @SiO 2 @MOF-199 和 K 2 CO 3存在下,2-(2-溴芳基)吲哚与 DMF 中的 2-甲氧基苯并咪唑反应生成一系列苯并[4, 5]咪唑并[1,2- a ]吲哚并[1,2- c ]喹唑啉,收率良好。该反应适用于范围广泛的 2-(2-溴芳基) 吲哚,其在溴苯基和吲哚部分含有给电子或吸电子取代基,在吲哚部分的 3 位有烷基取代基。涉及铜催化的 Ullmann 型 C (sp 2 ) 的反应途径)-N 偶联和通过 Meisenheimer 配合物进行加成消除亲核芳族取代,然后进行环缩合,被提议用于该催化过程。Fe 3 O 4 @SiO 2 @MOF-199催化剂可以多次回收再利用,催化活性没有任何变化。