An environmentally friendly approach to the green synthesis of azo dyes with aryltriazenes via ionic liquid promoted C-N bonds formation
作者:Yonghong Zhang、Yonghong Liu、Xiaoqian Ma、Xia Ma、Bin Wang、Hongguang Li、Yan Huang、Chenjiang Liu
DOI:10.1016/j.dyepig.2018.05.073
日期:2018.11
An efficient and green approach for the synthesis of azo dyes has been developed via the Brønsted acidic ionic liquid (IL) promoted diazo coupling reaction of naphthols with aryltriazenes. The reaction was carried out with the aryltriazenes as diazotizing agents, the Brønsted acidic ionic liquids as the promoter, and water as the green solvent at room temperature under air and metal-free conditions
通过布朗斯台德酸性离子液体(IL)促进的萘酚与芳基三氮烯的重氮偶合反应,已开发出一种高效且绿色的偶氮染料合成方法。反应在室温下在空气和无金属条件下,以芳基三氮烯为重氮化剂,以布朗斯台德酸性离子液体为促进剂,以水为绿色溶剂进行。值得注意的是,该方法的吸引人的优点包括温和的条件,优异的收率,简单的产物分离过程,大规模实验,药物的后期修饰和促进剂的可回收性。另外,在DMSO中研究了偶氮染料的紫外可见光谱特性。