Atom-Economic Route to Cyanoarenes and 2,2′-Dicyanobiarenes via Iron-Catalyzed Chemoselective [2 + 2 + 2] Cycloaddition Reactions of Diynes and Tetraynes with Alkynylnitriles
作者:Divya Bhatt、Hrishikesh Chowdhury、Avijit Goswami
DOI:10.1021/acs.orglett.7b01217
日期:2017.7.7
An efficient protocol for the synthesis of cyanoarenes has been developed via an iron-catalyzed chemoselective [2 + 2 + 2] cycloaddition reaction of diynes with alkynylnitriles under mild reaction conditions with good to excellent yields. The reaction is catalyzed by the combination of FeCl2·4H2O as a metal source, 2-(2,6-diisopropylphenyl)iminomethylpyridine (dipimp) as a ligand, and Zn as a reducing
在温和的反应条件下,通过铁催化的二炔与炔腈的化学选择性[2 + 2 + 2]环加成反应,已开发出氰基芳烃的有效合成方法,收率良好至极佳。在DME溶剂中,FeCl 2 ·4H 2 O作为金属源,2-(2,6-二异丙基苯基)亚氨基甲基吡啶(dipimp)作为配体和Zn作为还原剂的组合催化该反应。该方案进一步扩展到由四炔与炔腈的反应合成2,2'-二氰基双戊二烯骨架。