Process of preparing...

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

C - Chemistry, Metallurgy

07

C

C07C 281/18 (2006.01)

Patent

CA 2252606

Process for the preparation of 2,2'-(1-methyl-1,2- ethanediylidene)bis[hydrazine carboximidamide] by: a) reacting aminoguanidine hydrochloride with methylglyoxal aldehyde or methylglyoxal dimethyl acetal; and b) purifying the 2,2'-(1-methyl-1,2-ethanediylidene)bis[hydrazine carboximidamide] by crystallization from an acidic aqueous-isopropyl alcohol medium.

Procédé de préparation de 2,2'-(1-méthyl-1,2-éthanediylidine)bis [hydrazine carboximidamide] qui consiste: a) à faire réagir un chlorhydrate d'aminoguanidine avec un aldéhyde de méthylglyoxal ou avec un acétal dyméthyle de méthylglyoxal; et b) à purifier 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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