Iranian Journal of Catalysis (IJC) Polymer/HIO4 : An efficient catalyst for solvent-free synthesis of 2-naphthol azo dyes Volume 4 (2014) Issue 4, December 2014 2024 02 03 Polymer/HIO4 : An efficient catalyst for solvent-free synthesis of 2-naphthol azo dyes EN Abdolhamid Bamoniri Department of Organic Chemistry, Faculty of Chemistry, University of Kashan, Kashan, Iran 0000-0002-8911-2433 Alireza Pourali School of Chemistry, Damghan University, Damghan, I.R. Iran. Seyed Mohamad Reza Nazifi School of Chemistry, Damghan University, Damghan, I.R. Iran. Journal Article 2024 02 03 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.