The 1-substituted ethylidenemalononitriles la-c condensed with triethyl orthoformate in refluxing acetic anhydride to yield the dienes 2a-c. On the other hand, a mixture o f N, N-dimethylformamide and triethyl orthoformate condensed with la-d to yield the N, N-dimethylaminopentadienonitriles 2d-g. T
Studies with polyfunctionally substituted heteroaromatics: synthesis of several new thiazoles, pyrazolo[5,1-c]triazines and of polyfunctionally substituted pyridines and pyrimidines.
โ Scribed by Ahmed H.H. Elghandour; Mohamed K.A. Ibrahim; Said M.M. Elshikh; Fawzy M.M. Ali
- Publisher
- Elsevier Science
- Year
- 1992
- Tongue
- French
- Weight
- 502 KB
- Volume
- 48
- Category
- Article
- ISSN
- 0040-4020
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โฆ Synopsis
thioglycolic acid, aryldiazonium chloride, 3-arylpyrazol-5-yl diazonium chloride and alkylidenemalononitrile derivatives, respectively. The reaction mechanism for each one was discussed. All structures were suggested on the basis of elemental analyses and spectral data. Polyfunctionally substitutedheteroaromatics are biologically interesting molecules and their chemistry has recently received considerable attention'. Our group has been, in the last few years, involved in program directed at developing approaches for synthesis of polyfunctionally substituted heteroaromatics from simple and laboratory available starting materials 1-I. These polyfunctionalheteroaromatics seemed interesting as potential biodegradable agrochemicals. Now as a part of a biological chemistry program in our
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