OICC Press Iranian Journal of Catalysis 2345-4865 2 3 2024 02 03 Bi(NO3)3.5H2O: An efficient acidic reagent for synthesis of azo dyes at room temperature EN Bi Bi Fatemeh Mirjalili Department of Chemistry, College of Science, Yazd University, Yazd, P.O. Box 89195-741, Iran 0000-0002-6588-4041 Abdolhamid Bamoniri Department of Organic Chemistry, Faculty of Chemistry, University of Kashan, Kashan, Iran 0000-0002-8911-2433 Naimeh Salehi Department of Chemistry, College of Science, Yazd University, Yazd, P.O. Box 89195-741, Iran Journal Article 2024 02 03 An one-pot method has been developed for the synthesis of azo dyes via sequential diazotization–diazo coupling of aromatic amines with coupling agents at room temperature in the presence of Bi(NO3)3. 5H2O. Short reaction times, high yields, a clean process, simple methodology, easy work-up and green ‎conditions are advantages of this protocol.‎