Solvent-free preparation of arylaminotetrazole derivatives using aluminum (III) hydrogensulfate as an effective catalyst

F Khamooshi, AR Modarresi-Alam

Index: Khamooshi, Ferydoon; Modarresi-Alam, Ali Reza Chinese Chemical Letters, 2010 , vol. 21, # 8 p. 892 - 896

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Citation Number: 6

Abstract

An efficient and simple method for the preparation of 5-arylamino-1H-tetrazole and 1-aryl-5- amino-1H-tetrazole derivatives is reported using aluminum (III) hydrogensulfate (Al (HSO4) 3) as an effective heterogeneous catalyst from secondary arylcyanamides. Generally, when the substitution in arylcyanamide is strongly electron-withdrawing the position of equilibrium would shift toward the isomer of 1-aryl-5-amino-1H-tetrazole (B) and as the electron- ...