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.
Synthesis of <i>N</i>
-Fused Seven-Membered Indoline-3-ones <i>via</i>
a Palladium-Catalyzed One-Pot Insertion Reaction from 2-Alkynyl Arylazides and Cyclic <i>β</i>
-Diketones
A novel insertion reaction of cyclic C‐acylimines into cyclic β‐diketones to construct N‐fused seven‐membered multifunctional polycyclic indoline‐3‐one derivatives has been described, which has shown good tolerance of various functional groups. The corresponding products were obtained in moderate to good yields under mild reaction conditions.
A novel, one-pot, three-step synthetic method to prepare 2-aminobenzophenones from 2-alkynyl arylazides has been disclosed. This reaction is catalyzed by palladium to form 3-hydroxy-3-phenylindolin-2-ones, which is followed by hydrolysis of amide bonds and copper-catalyzed decarboxylation to generate 2-aminobenzophenones. The desired products are afforded in moderate to good yields under mild reaction
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