Biomass into chemicals: One-pot two- and three-step synthesis of quinoxalines from biomass-derived glycols and 1,2-dinitrobenzene derivatives using supported gold nanoparticles as catalysts
作者:M.J. Climent、A. Corma、J.C. Hernández、A.B. Hungría、S. Iborra、S. Martínez-Silvestre
DOI:10.1016/j.jcat.2012.05.002
日期:2012.8
one-pot two-step method, for the synthesis of quinoxalines by oxidative coupling of vicinal diols with 1,2-phenylenediamine derivatives, has been developed by using gold nanoparticles supported on nanoparticulated ceria (Au/CeO2) or hydrotalcite (Au/HT) as catalysts and air as oxidant, in the absence of any homogeneous base. Reaction kinetics shows that the reaction controlling step is the oxidation of
通过使用负载在纳米二氧化铈(Au / CeO 2)或水滑石上的金纳米粒子,开发了一种有效的,选择性的一锅两步方法,该方法通过邻二醇与1,2-苯二胺衍生物的氧化偶联来合成喹喔啉。(Au / HT)作为催化剂,空气作为氧化剂,没有任何均相碱。反应动力学表明,反应控制步骤是将二醇氧化为α-羟基羰基化合物。此外,已经成功地进行了以1,2-二硝基苯和1,2-丙二醇为原料的2-甲基喹喔啉的一锅式三步合成,最终产物的转化率为98%,总产率为83%。