ChemInform Abstract: Synthesis of Cross-Conjugated Heterocyclic Mesomeric Betaines.
β Scribed by K. Saidi; H. Sheibani
- Publisher
- John Wiley and Sons
- Year
- 2010
- Weight
- 26 KB
- Volume
- 32
- Category
- Article
- ISSN
- 0931-7597
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Synthesis of New Conjugated Mesomeric Betaines from Alkoxycarbonylazinium Salts. -Treatment of the iodide (I), which is generated from 2-ethoxycarbonylpyridinium N-aminide, with aminoheterocycles leads to various mesomeric betaines like (III) and (VI). In some cases, however, desired betaines are n
## Abstract The synthesis of seven mesomeric triazaphenalene betaines **4aβg** by condensation reaction of hexahydroβ2__H__βpyrimido[1,2β__a__]pyrimidine **1** with diethyl malonates **2aβg** or with bis(2,4,6βtrichlorophenyl)malonates **3c,f** has been achieved. The guanidine **1** forms in benzen