1-Amino-2-hydrazinobenzimidazole and its reactions with some carbonyl compounds
摘要:
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 alpha-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.
1-Amino-2-hydrazinobenzimidazole and its reactions with some carbonyl compounds
摘要:
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 alpha-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.
Сyclization of 1-amino-2-hydrazinobenzimidazole treated with carbon disulfide. Synthesis of 9-amino-2,9-dihydro-3Н-[1,2,4]triazolo[4,3-а]benzimidazole-3-thione and its derivatives
作者:T. A. Kuzmenko、L. N. Divaeva、A. S. Morkovnik、G. S. Borodkin、M. S. Korobov
DOI:10.1134/s1070428017050165
日期:2017.5
1-Amino-2-hydrazinobenzimidazole when treated with carbon disulfide underwent a regioselective cyclization involving the hydrazino group to form 9-amino-2,9-dihydro-3De-[1,2,4]triazolo[4,3-D degrees]benzimidazole-3-thione. Being an N-amine this compound gives Schiff bases with aromatic aldehydes, and as thione in DMF at a temperature not exceeding 60A degrees C it is successfully alkylated, particularly by functionalized alkylating agents, affording the corresponding sulfanylmethyl derivatives. In boiling DMF, as it is demonstrated by an example of benzyl chlorides, NNH2 group also undergoes alkylation that unexpectedly results in 4-benzylidenamino-3-benzylsulfanyltriazolobenzimidazoles.
[EN] INHIBITORS OF HEPATITIS C VIRUS<br/>[FR] INHIBITEURS DU VIRUS DE L'HÉPATITE C
申请人:PRESIDIO PHARMACEUTICALS INC
公开号:WO2013163466A1
公开(公告)日:2013-10-31
A class of compounds that inhibit Hepatitis C Virus (HCV) is disclosed, along with compositions containing the compound, and methods of using the composition for treating individuals infected with HCV. The invention is intended to include all isotopically labeled analogs of the compounds of the invention. Isotopes include those atoms having the same atomic number but different mass.
1-Amino-2-hydrazinobenzimidazole and its reactions with some carbonyl compounds
作者:T. A. Kuz’menko、V. V. Kuz’menko、L. N. Divaeva、A. S. Morkovnik、G. S. Borodkin
DOI:10.1134/s1070428014050182
日期:2014.5
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 alpha-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.