Investigation of the reactions of 2‐hydrazino‐benzimidazoles with β‐diketones: Synthesis of 2‐(3,5‐disubstituted‐ 1 H ‐pyrazol‐1‐yl)benzimidazoles | Zendy

Joshi Krishna C. | Zendy; Jain Renuka | Zendy; Dandia Anshu | Zendy; Sharma Kanti | Zendy

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Investigation of the reactions of 2‐hydrazino‐benzimidazoles with β‐diketones: Synthesis of 2‐(3,5‐disubstituted‐ 1 H ‐pyrazol‐1‐yl)benzimidazoles

Author(s) -

Joshi Krishna C.,

Jain Renuka,

Dandia Anshu,

Sharma Kanti

Publication year - 1988

Publication title -

journal of heterocyclic chemistry

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.321

H-Index - 59

eISSN - 1943-5193

pISSN - 0022-152X

DOI - 10.1002/jhet.5570250608

Subject(s) - chemistry , alkylation , elemental analysis , proton nmr , benzimidazole , medicinal chemistry , spectral analysis , organic chemistry , catalysis , spectroscopy , physics , quantum mechanics

Reaction of 2‐hydrazinobenzimidazoles with β‐diketones in neutral and acidic media revealed that 2‐(3,5‐disubstituted‐1 H ‐pyrazol‐1‐yi)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, 19 F nmr, 13 C nmr and mass spectral studies.

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