1616615-69-0Relevant articles and documents
1-Amino-2-hydrazinobenzimidazole and its reactions with some carbonyl compounds
Kuz'Menko,Kuz'Menko,Divaeva,Morkovnik,Borodkin
, p. 729 - 735 (2014/07/08)
1-Amino-2-hydrazinobenzimidazole was obtained for the first time by treating 1-aminobenzimidazole-2-sulfonic acid with hydrazine hydrate. This compound readily condensed with aromatic aldehydes involving both amino groups. The condensation with 2,4-pentanedione affords 1-amino-2-(3,5-dimethylpyrazol-1- yl)benzimidazole, and with α-ketoacids in glacial acetic acid yields mixtures of 10-acetylamino-3-R-1,2,4-triazino[4,3-a]benzimidazol-4(10H)-ones and 4-amino-2-R-1,2,4-triazino[2,3-a]benzimidazol-3(4H)-ones.