Process of preparing...

Details Process of preparing... Process of preparing...

C - Chemistry, Metallurgy

07

C

C07C 281/16 (2006.01) C07C 277/08 (2006.01) C07C 281/18 (2006.01)

Patent

CA 2252601

Process for the preparation of 2,2'-(1-methyl-1,2- ethanediylidine)bis[hydrazine carboximidamine] by a) removing impurities from aminoguanidine bicarbonate; b) reacting the aminoguanidine bicarbonate with methylglyoxal dimethylacetal in an aqueous isopropyl medium; and c) purifying the 2,2'-(1-methyl-1,2-ethanediylidene)bis[hydrazine carboximidamide] by crystallization from an acidic aqueous-isopropanol medium.

Procédé de préparation de 2,2'-(1-méthyl-1,2-éthanediylidine)bis[hydrazine carboximidamide] qui consiste à: a) enlever les impuretés du bicarbonate d'aminoguanidine; b) faire réagir le bicarbonate d'aminoguanidine avec un méthylglyoxaldiméthylacétal dans un milieu isopropylique aqueux; et c) purifier le 2,2'-(1-méthyl-1,2-éthanediylidine)bis[hydrazine carboximidamide] par cristallisation à partir d'un milieu acide d'isopropanol aqueux.

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