Synthesis of 6<i>H</i>-Isoindolo[2,1-<i>a</i>]indol-6-ones Through Wittig Reaction and Tandem Reductive Cyclization-Lactamization
作者:Hari K. Kadam、Santosh G. Tilve
DOI:10.1002/ejoc.201300047
日期:2013.7
A convenient and efficient two-step route to 6H-Isoindolo[2,1-a]indol-6-ones has been developed starting from o-nitrobenzaldehydes. The methodology involves Wittigreaction followed by tandem reductive cyclization–lactamization. A series of isoindoloindolones incorporating different substituents on the indole nucleus has been prepared.
An efficient synthesis of 6H-isoindolo[2,1-a]indol-6-ones through rhodium-catalyzed NH-indole-directed C–H carbonylation of 2-arylindoles with carbonmonoxide has been developed. Preliminary mechanistic studies revealed that this reaction proceeds via N–H bond cleavage and subsequent C–H bond cleavage. Reaction monitoring via ESI-MS was used to support the formation of five-membered rhodacycle species
通过铑催化一氧化碳2-芳基吲哚的NH-吲哚定向的CH羰基化羰基反应,已开发出6 H-异吲哚并[2,1 - a ]吲哚-6-酮的有效合成方法。初步的机理研究表明,该反应通过NH键断裂和随后的CH键断裂进行。通过ESI-MS进行的反应监测用于支持催化循环中五元罗丹环物种的形成。
Facile approaches toward the synthesis of 6H-isoindolo[2,1-α]indol-6-ones via palladium-catalyzed carbonylation with carbon monoxide
6H-isoindolo[2,1-α]indol-6-ones were developed. In the first protocol, 6H-isoindolo[2,1-α]indol-6-ones were prepared from 2-(2-iodophenyl)-1H-indoles viapalladium-catalyzed intramolecular aminocarbonylation. The second involves intermolecular carbonylation of indoles with iodobenzenes followed by intramolecular cross-dehydrogenative-coupling.
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。