Solvent-free mechanochemical synthesis of azo dyes

Lin Zhang; Qinglang Song; Yanxian Wang; Rui Chen; Yu Xia; Bin Wang; Weiwei Jin; Shaofeng Wu; Ziren Chen; Azhar Iqbal; Chenjiang Liu; Yonghong Zhang

doi:10.1039/D4MR00053F

Solvent-free mechanochemical synthesis of azo dyes†

Lin Zhang,^a Qinglang Song,^a Yanxian Wang,^a Rui Chen,^a Yu Xia,

^a Bin Wang,

^a Weiwei Jin,

^a Shaofeng Wu,^a Ziren Chen,^a Azhar Iqbal,*^b Chenjiang Liu

*^a and Yonghong Zhang

*^a

Author affiliations

* Corresponding authors

^a State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, Key Laboratory of Oil and Gas Fine Chemicals, Ministry of Education & Xinjiang Uygur Autonomous Region, Urumqi Key Laboratory of Green Catalysis and Synthesis Technology, College of Chemistry, Xinjiang University, Urumqi 830017, P. R. China
E-mail: zhzhzyh@126.com, pxylcj@126.com

^b Department of Chemistry, Bacha Khan University, Charsadda, Pakistan
E-mail: azhariqbal@bkuc.edu.pk

Abstract

An efficient diazotization of phenolic compounds with aryltriazenes is herein demonstrated by employing ball milling under catalyst-, promoter- and solvent-free conditions. The present protocol offers several advantages including mild conditions, good selectivity and high yields, simple operation and practical gram-scale synthesis. Overall, this novel strategy significantly improves the reaction efficiency, simplifies purification procedures of the diazotization reaction and provides potential for the industrial preparation of azo dyes.

This article is part of the themed collection: Catalysis showcase

RSC Mechanochemistry

Solvent-free mechanochemical synthesis of azo dyes†

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