Construction of Tricyclic Nitrogen Heterocycles by a Gold(I)‐Catalyzed Cascade Cyclization of Allenynes and Application to Polycyclic π‐Electron Systems
BrettPhosAuNTf2 in the presence of iPrOH to give 1,2-dihydrobenzo[cd]indole derivatives, some of which were converted into nitrogen-containing polycyclic aromatic compounds with highly conjugated π-electron systems. A hexacyclic indolium salt (see structure) showed concentration-dependent photophysical properties attributable to aggregate formation.
在i PrOH存在下,BrettPhosAuNTf 2促进了羟基异丁酰基 (Hib) 保护的氨基丙炔的金催化双环化,得到 1,2-二氢苯并[ cd ]吲哚衍生物,其中一些转化为含氮多环芳烃化合物高度共轭的 π 电子系统。六环吲哚盐(见结构)显示出可归因于聚集体形成的浓度依赖性光物理特性。
Transition‐Metal‐Free Synthesis of 2‐Substituted Benzo[<i>cd</i>]Indoles via the Reaction of 1‐Halo‐8‐lithionaphthalenes with Nitriles
作者:Semyon V. Tsybulin、Mark V. Kaplanskiy、Alexander S. Antonov
DOI:10.1002/chem.202303768
日期:2024.2.16
effective organolithium approach to the synthesis of 2-substituted benzo[cd]indoles from peri-dihalonaphthalenes and nitriles has been developed. The reaction proceeds via a surprisingly easy intramolecular aromatic nucleophilic substitution facilitated by the “clothespin effect”. The discovered transformation provides good yields, allows usage of extensive range of nitriles, and demonstrates a good substituents
开发了一种简单有效的有机锂方法,用于从邻二卤代萘和腈合成2-取代苯并[ cd ]吲哚。该反应通过“衣夹效应”促进的令人惊讶的简单分子内芳香族亲核取代进行。所发现的转化提供了良好的产率,允许使用广泛范围的腈,并表现出良好的取代基耐受性。
Palladium-Catalyzed C8-H Acylation of 1-Naphthylamines with Acyl Chlorides
作者:Xiaomeng Yu、Fan Yang、Yusheng Wu、Yangjie Wu
DOI:10.1021/acs.orglett.9b00283
日期:2019.3.15
A facile and efficient protocol for palladium-catalyzed regioselective C8-H acylation of 1-naphthylamine derivatives with acyl chlorides has been developed. The reaction exhibits broad functional group tolerance, and both aromatic and α,β-unsaturated acyl chlorides can be effectively coupled with 1-naphthylamines. Moreover, the picolinamide moiety as a bidentate directing likely plays a key role in