A novel method for the formation of indole derivatives via gold-catalyzed tandem reactions of 2-alkynyl arylazides and oxygen-containing heterocycles has been developed. A variety of indole derivatives were prepared under mild reaction conditions.
An efficient method for the synthesis of 1H-indole-3-sulfonates via Palladium-catalyzed tandemreactions of 2-alkynyl arylazides with sulfonic acids has been developed. The desired products were obtained in good to excellent yields under mild reaction conditions. The reactions were shown to proceed very fast, in most cases, within 10 min.
Gold-Catalyzed Multiple Cascade Reaction of 2-Alkynylphenylazides with Propargyl Alcohols
作者:Nan Li、Tian-Yi Wang、Liu-Zhu Gong、Liming Zhang
DOI:10.1002/chem.201406456
日期:2015.2.23
An unprecedented gold‐catalyzed multiplecascadereaction between 2‐alkynyl arylazides and alkynols has been developed, allowing for the step‐economical synthesis of pyrroloindolone derivatives with a wide range of structural diversity. In this reaction, the gold complex participates in triple catalysis in tandem fashion. Moreover, the efficient chirality transfer from optically pure alkynol substrates
Tandem Synthesis of Benzo[<i>b</i>]carbazoles and Their Photoluminescent Properties
作者:Yanpeng Xing、Binbin Hu、Qijun Yao、Ping Lu、Yanguang Wang
DOI:10.1002/chem.201301887
日期:2013.9.16
5 H‐Benzo[b]carbazoles were prepared through a tandem reaction between 2‐ethynyl‐N‐triphenylphosphoranylidene anilines and α‐diazoketones through ketenimine intermediates in moderate‐to‐good yields. By using this approach, benzo[b]benzo[5,6]indolo[3,2‐h]carbazoles, fluoreno[9,1‐ab]carbazoles, and fluoreno[9,1‐ab]fluoreno[1′,9′:5,6,7]indolo[3,2‐h]carbazoles were constructed in one pot. Moreover, the
通过2-乙炔基-N-三苯基磷酰亚苯胺苯胺和α-二氮酮通过酮亚胺中间体的串联反应,以中等至良好的产率制备了5 H-苯并[ b ]咔唑。通过使用这种方法,苯并[ b ]苯并[5,6]吲哚并[3,2- h ]咔唑,芴[9,1- ab ]咔唑和芴[9,1- ab ]氟[1',9 ′:5,6,7] indolo [3,2- h ]咔唑是在一个锅中制成的。而且,最终产物发出的光在410-521 nm范围内,量子产率高达62%。
NBS-assisted palladium-catalyzed bromination/cross-coupling reaction of 2-alkynyl arylazides with KSCN: an efficient method to synthesize 3-thiocyanindoles
A novel and efficient method for the synthesis of 3-thiocyanindoles from 2-alkynyl arylazides with KSCN is described. NBS (N-bromosuccinimide) plays an important role in this cascade bromination/cross-coupling reaction. This reaction provides the 3-thiocyanindole products in good to excellent yields under mild reaction conditions.