2-Nitroguanidine derivatives: XI. Reactions of N′-nitrohydrazinecarboximidamide and 2-methylidene-N′-nitrohydrazinecarboximidamide with glyoxal
作者:E. L. Metelkina
DOI:10.1134/s1070428008040040
日期:2008.4
The reaction of glyoxal with N'-nitrohydrazinecarboximidamide (1-amino-2-nitroguanidine) in the presence of sodium hydroxide at a molar ratio of 1 : 1 : 1 gave N'-nitro-2-(2-oxoethylidene)hydrazinecarboximidamide as a mixture of syn and anti isomers, whereas at a reactant ratio of 1: 2:2 N'-nitro-2-[(5-nitroamino-2H-1,2,4-triazol-3-yl)methyl]hydrazinecarboximidamide and 3-nitroamino-4,5-dihydro-1,2,4-triazin-5-ol were formed. N'-Nitro-2-(2-oxoethylidene)hydrazinecarboximidamide reacted with N'-nitrohydrazinecarboximidamide in boiling ethanol to give N'-nitro-2-[(5-nitroamino-2H-1,2,4-triazol-3-yl)methyl]hydrazinecarboximidamide, while in glacial acetic acid 2,2'-(ethane-1,2-diylidene)bis(N'-nitrohydrazinecarboximidamide) was obtained. The latter was also formed in the reaction of glyoxal with N'-nitrohydrazinecarboximidamide in acetic acid at room temperature. The reaction of 2-methylidene-N'-nitrohydrazinecarboximidamide with glyoxal led to the formation of 3-nitroimino-2,3,4,5-tetrahydro-1,2,4-triazine-5-carbaldehyde or 1-(methylideneamino)-2-(nitroimino)imidazolidine-4,5-diol, depending on the conditions.