Synthesis of 3-Hydrazino-1,2,4-Triazino[4,3-a]Benzimidazole: A Synthon for Building Novel Nitrogen Heterocycles
β Scribed by Venkataratnam, R. V.; Sayanna, E.; Sujatha, K.
- Book ID
- 118154372
- Publisher
- Taylor and Francis Group
- Year
- 1987
- Tongue
- English
- Weight
- 154 KB
- Volume
- 17
- Category
- Article
- ISSN
- 0039-7911
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UDC 547.873'785.5'735 f 724.07:543.51 2-[(8-Ethyl-, arylimino)phenethyl]-l,2,4-triazino[2,3-a]benzimidazoles were obtained by reaction of 2-aroylmethyl-l,2,4-triazino[2,3-a]benzimidazol-4H-3-ones with ethyl(aryl)amines or urea. By the action of phosphorus oxychloride, these benzimidazoles cyclize in
## Abstract magnified image A new class of aminopyrazolones, aminoisoxazolones, aminopyrimidinones, and thioxopyrimidinones were synthesized from Michael adduct, ethylβ3,4βdiaroylβ2βcyanobutyrate, on reaction with different nucleophiles, hydrazine hydrate, hydroxylamine hydrochloride, and urea deri