Hydrogenation on palladium-containing granulated catalysts 3. Synthesis of aminobenzimidazoles by catalytic hydrogenation of dinitroanilines

…, IB Karmanova, LD Konyushkin, VV Semenov

Index: Elkin; Tolkacheva; Chernysheva; Karmanova; Konyushkin; Semenov Russian Chemical Bulletin, 2007 , vol. 56, # 6 p. 1216 - 1226

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Citation Number: 6

Abstract

Abstract Efficient hydrogenation of o-aminonitrobenzenes on palladium-containing granulated carbon catalysts in carboxylic acid solutions was accompanied by cyclization into aminobenzimidazoles. A simple hydrogenation reactor with a fixed gauze holding a reusable granulated catalyst was designed. Acylated and sulfonylated 4 (7)- aminobenzimidazoles were obtained. In terms of electronic and geometrical parameters, ...