Catalytic application of recyclable silica-supported bismuth(III) chloride in the benzo[N,N]-heterocyclic condensation
作者:Kioumars Aghapoor、Farshid Mohsenzadeh、Atena Shakeri、Hossein Reza Darabi、Mitra Ghassemzadeh、Bernhard Neumüller
DOI:10.1016/j.jorganchem.2013.06.037
日期:2013.10
Silica-supported bismuth(III) chloride (BiCl3/SiO2) has been successfully employed in the condensation of 1,2-dicarbonyls with a variety of arene-1,2-diamines bearing either electron withdrawing or donating functional groups. The catalyzed reaction proceeded smoothly under ambient temperature in methanol to give the corresponding quinoxaline and pyrido[2,3-b]pyrazine compounds in good to excellent
二氧化硅负载的氯化铋(III)(BiCl 3 / SiO 2)已成功地用于1,2-二羰基化合物与各种带有吸电子或供电子官能团的芳烃1,2-二胺的缩合反应。催化的反应在环境温度下在甲醇中平稳进行,以良好的至优异的产率得到相应的喹喔啉和吡啶并[2,3- b ]吡嗪化合物。与均相BiCl 3相比,该催化剂具有显着的可重用活性和更高的催化性能。介绍了一种可行的BiCl 3 / SiO 2催化作用机理。此外,制备的不对称苯并[ N]的晶体结构,Ñ ] -heterocycles已经通过单晶X射线衍射来确定。