Polymer/HIO4 : An efficient catalyst for solvent-free synthesis of 2-naphthol azo dyes

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  • Abdolhamid Bamoniri1,
  • Alireza Pourali2,
  • Seyed Mohamad Reza Nazifi2,
  1. Department of Organic Chemistry, Faculty of Chemistry, University of Kashan, Kashan, Iran
  2. School of Chemistry, Damghan University, Damghan, I.R. Iran.

Published in Issue 2024-02-03

How to Cite

Bamoniri, A., Pourali, A., & Nazifi, S. M. R. (2024). Polymer/HIO4 : An efficient catalyst for solvent-free synthesis of 2-naphthol azo dyes. Iranian Journal of Catalysis, 4(4). https://oiccpress.com/ijc/article/view/3819

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Abstract

A convenient, one-pot method for the synthesis of diazonium salt has been developed by the sequential diazotization of aromatic amines with NaNO2, polymer- supported periodic acid (PPIA) and 2-naphthole under solvent-free conditions at room temperature. By using this method, several types of aromatic amine, containing electron-withdrawing and electron-donating groups, were rapidly converted to the corresponding azo dyes in good to excellent yields. The ensuing aryl diazonium salts supported on polymer (aryl diazonium polymer), ArN2 +IO4 - were sufficiently stable to be kept at room temperature in the dry state. The use of mild reaction conditions and an inexpensive procedure are further advantages of this method.

Keywords

  • Azo dye.,
  • Diazotization,
  • Polymer-supported periodic acid,
  • Solvent-free condition
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