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ChemInform Abstract: Enaminonitriles in Heterocyclic Synthesis: New Routes for the Synthesis of Some Novel Azolo[1,5-a]pyrimidine, Pyrimido[1,2-a]benzimidazole, Pyrido[1,2-a]benzimidazole, Pyrazolo[3,4-b]pyridine, Pyrazole and Pyrimidine Derivatives.

โœ Scribed by Khadijah Mohamed Al-Zaydi; Mariam Abd Alha Al-Shiekh; Ebtisam Abdel-Aziz Hafez

Publisher
John Wiley and Sons
Year
2010
Weight
33 KB
Volume
31
Category
Article
ISSN
0931-7597

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Heterocyclic synthesis via enaminones: R
Heterocyclic synthesis via enaminones: Regioselective synthesis of some novel pyrazole, isoxazole, pyrimidine, pyrido[1,2-a]benzimidazole and pyrazolo[1,5-a]-pyrimidine derivatives
โœ Kamal M. Dawood; Zaghloul E. Kandeel; Ahmad M. Farag ๐Ÿ“‚ Article ๐Ÿ“… 1999 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 164 KB ๐Ÿ‘ 2 views

## 2-Acetylbenzothiazole (1) reacts with dimethylformamide dimethylacetal (DMF-DMA) to afford the enaminone 2. Compound 2 reacts regioselectively with some nitrilimines 5a-d and nitrile oxides 6b-d to afford the novel pyrazole and isoxazole derivatives 11a-d and 12b-d, respectively, which react wi