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Heterocyclic Fused Rings with Bridgehead Nitrogen Atoms: Single-Step Synthesis of Azolo[1″,2″:1′,2′]pyrido[5′,6′:5,4]pyrimido[1,6-a]benzimidazole; Pyrido[1,2-a]benzimidazole; Pyrido[4″,5″:2′,3′]pyrido[6′,5′:4,5]pyrimido-[1,6-a]benzimidazole and Polysubsti

✍ Scribed by Raslan, M. A.


Book ID
127351336
Publisher
Chinese Electronic Periodical Services
Year
2000
Tongue
English
Weight
373 KB
Volume
47
Category
Article
ISSN
0009-4536

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First synthesis of novel pentaheterocycl
✍ Nehal M. Elwan 📂 Article 📅 2004 🏛 Journal of Heterocyclic Chemistry 🌐 English ⚖ 124 KB

## Abstract Reaction of 1‐amino‐3‐arylpyrido[1,2‐__a__]benzimidazole‐2,4‐dicarbonitrile **(1)** with dimethylformamide‐dimethylacetal (DMF‐DMA) gave **1**‐[__N,N__‐(dimethylaminomethylene)amino]‐3‐arylpyrido[1,2‐__a__]benzimidazole‐2,4‐dicarbonitrile **(2).** Compounds **(1)** reacted with triethyl