120513-33-9Relevant academic research and scientific papers
Reaction of 2-hydrazinobenzimidazole with β-diketones: A structural reinvestigation
Singh, S. P.,Kumar, Savita,Kumar, Devinder
, p. 262 - 265 (2007/10/02)
The reaction of 2-hydrazinobenzimidazole (1) with pentane-2,4-dione yields a pyrazole derivative (2) instead of the reported triazepine (3).Several 2-pyrazolylbenzimidazoles (4) have similarly been synthesized using unsymmetrical β-diketones and their precursors.It has been shown that 1H NMR spectroscopy can easily distinguish the isomeric pairs.
Investigation of the Reactions of 2-Hydrazinobenzimidazoles with β-diketones: Synthesis of 2-(3,5-Disubstituted-1H-pyrazol-1-yl)benzimidazoles
Joshi, Krishna C.,Jain, Renuka,Dandia, Anshu,Sharma, Kanti
, p. 1641 - 1643 (2007/10/02)
Reaction of 2-hydrazinobenzimidazoles with β-diketones in neutral and acidic media revealed that 2-(3,5-disubstituted-1H-pyrazol-1-yl)benzimidazoles are formed in the former case, whereas hydrazones are obtained in acidic medium.Further the alkylation of >NH of the title compound was investigated.Characterisation of these products have been done by elemental analysis, ir, pmr, 19F nmr, 13C nmr and mass spectral studies.
