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Synthesis of polyazaheterocycles by Michael addition of CH acids to α,β-unsaturated nitriles. Synthesis of pyrido[1,2-a]benzimidazole and pyrimido[5′,4′: 5,6]pyrido[1,2-a]benzimidazole derivatives

✍ Scribed by Prof. Dr. Krystyna Bogdanowicz-Szwed; Agnieszka Czarny


Book ID
105354177
Publisher
John Wiley and Sons
Year
1993
Tongue
English
Weight
287 KB
Volume
335
Category
Article
ISSN
1615-4150

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✍ Mohamed R. Shaaban; Taha M. A. Eldebss; Ahmed F. Darweesh; Ahmad M. Farag 📂 Article 📅 2008 🏛 Journal of Heterocyclic Chemistry 🌐 English ⚖ 296 KB 👁 1 views

## Abstract magnified image 4‐Acetyl‐5‐methyl‐1‐phenyl‐1__H__‐pyrazole reacts with dimethylformamide dimethylacetal (DMF‐DMA) to afford the corresponding (__E__)1‐(5‐methyl‐1‐phenyl‐1__H__‐pyrazol‐4‐yl)‐3‐(__N,N__‐dimethylamino)‐2‐propen‐1‐one. The latter product undergoes regioselective 1,3‐dipol