Can be Azo Dyes Obtained by Grinding under Solvent??Free Conditions?

N Noroozi??Pesyan, J Khalafy…

Index: Noroozi-Pesyan, Nader; Khalafy, Jabbar; Malekpoor, Zahra Journal of the Chinese Chemical Society, 2009 , vol. 56, # 5 p. 1018 - 1027

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Citation Number: 15

Abstract

Abstract The solid-solid reactions of some electron-donors with sulfanilic acid in the presence of solid sodium nitrite afford azo dyes by self-catalyzed diazotization of sulfanilic acid (2) under solvent-free conditions with moderate yields. Also the reactions of some electron-donors with diazotization of o-nitroaniline (5), m-nitroaniline (6) and p-nitroaniline (7) in the presence of solid sodium nitrite catalyzed by p-toluenesulfonic acid (PTSA) ...