Synthesis of ethyl 6-aryl-4-oxo-4,6-dihydro-1(12)(13)h-pyrimido-[2′,1′:4,5][1,3,5]triazino[1,2-a]benzimidazole-3-carboxylates
✍ Scribed by Anton V. Dolzhenko; Wai-Keung Chui; Anna V. Dolzhenko
- Publisher
- Journal of Heterocyclic Chemistry
- Year
- 2006
- Tongue
- English
- Weight
- 376 KB
- Volume
- 43
- Category
- Article
- ISSN
- 0022-152X
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## Abstract magnified image The 2‐amino‐4‐(het)aryl‐4,6‐dihydro‐1(3)(11)__H__‐[1,3,5]triazino[2,1‐__b__]quinazolin‐6‐ones were prepared readily by cyclocondensation of anthranilic acid derived 4‐oxo‐3,4‐dihydroquinazolinyl‐2‐guanidine with a variety of aldehydes. The structures of the compounds we
**Synthesis of 5,6‐Dimethyl‐4‐oxo‐1,3,4,5‐tetrahydro‐imidazo[4,5‐__c__][1,2,6]thiadiazin 2,2‐dioxide and 7‐Methyl‐4‐oxo‐1__H__‐3,4‐dihydropyrimido[4,5‐__c__][1,2,6]thiadiazin 2,2‐dioxide** The derivatives of the above heterocyclic ring systems were prepared by reaction of the corresponding __o__‐am
## Abstract For Abstract see ChemInform Abstract in Full Text.
## Abstract A versatile methodology to build the 1__H__‐[1,2,4]triazino[1,6‐__a__]quinoline‐2,4,6(3__H__)‐trione structure from methyl 6‐fluoro4‐oxo‐1,4‐dihydro‐2‐quinolinecarboxylate was developed. The method involves an __N__‐ami‐nation followed by condensation of an aroyl isocyanate to form an a