Sodium Bromate/Sodium Hydrogen Sulfite: A New Catalyst for the Synthesis of Quinoxaline Derivatives
作者:Khalid M. Khan、Shafqat Hussain、Shahanaz Perveen、Fazal Rahim、Sammer Yousuf、Ejaz Hussain
DOI:10.2174/1570178611666140304000936
日期:2014.4
Treatment of 1,2-phenylenediamine with benzil analogs in the presence of a mixture of sodium bromate/
sodium hydrogen sulfite in water gave the corresponding quinoxalines in high yields. The method is eco-friendly due to
use of water instead of other hazardous organic solvents.
An efficient synthesis of quinoxaline derivatives mediated by stannous chloride
作者:Da-Qing Shi、Guo-Lan Dou、Sai-Nan Ni、Jing-Wen Shi、Xiao-Yue Li
DOI:10.1002/jhet.5570450637
日期:2008.11
important quinoxaline derivatives were efficiently synthesized in excellent yields by the reaction of 1,2-diketones and 2-nitroaniline, benzofuroxan or 1,2-dinitrobenzene promoted by SnCl22H2O. The role of stannous chloride is acting as both reductive agent and catalyst in this synthesis. This new method has the advantages of accessible starting materials, convenient manipulation, short reaction time
Phosphine free Mn-complex catalysed dehydrogenative C–C and C–heteroatom bond formation: a sustainable approach to synthesize quinoxaline, pyrazine, benzothiazole and quinoline derivatives
作者:Kalicharan Das、Avijit Mondal、Dipankar Srimani
DOI:10.1039/c8cc05877f
日期:——
Herein the first sustainable synthesis of quinoxalines, pyrazines and benzothiazoles catalysed by a phosphine free Mn(I) complex via acceptorless dehydrogenative coupling (ADC) is reported. This method is also applied successfully to synthesize quinolines via the dehydrogenation (removal of H2) and condensation (removal of H2O) reaction between 2-aminobenzyl alcohols and secondary alcohols.