Approaches to the Synthesis of 2,3-Dihaloanilines. Useful Precursors of 4-Functionalized-1<i>H</i>-indoles
作者:Verónica Guilarte、M. Pilar Castroviejo、Patricia García-García、Manuel A. Fernández-Rodríguez、Roberto Sanz
DOI:10.1021/jo200406f
日期:2011.5.6
2,3-Dihaloanilines have been proved as useful starting materials for synthesizing 4-halo-1H-indoles. Subsequent or in situ functionalization of the prepared haloindoles allows the access to a wide variety of 2,4- or 2,3,4-regioselectively functionalized indoles in good overall yields. As no efficient synthetic routes to 2,3-dihaloanilines have been described in the literature, different approaches
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。