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: NEW ROUTES FOR SYNTHESIS OF BENZOAZINES
β Scribed by Negm, Abdalla M.; Abd El-Aal, Fatma Abd El-Maksoud; Hafez, Ebtisam A.; Elnagdi, Mohamed H.; Mostafa, Yasser M. N.
- Book ID
- 115470742
- Publisher
- Taylor and Francis Group
- Year
- 1995
- Tongue
- English
- Weight
- 396 KB
- Volume
- 106
- Category
- Article
- ISSN
- 1042-6507
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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 substitutedh
## Abstract The alkylβsubstituted heterocyclic carbonitriles 1β3 react with elemental sulphur to yield the thienoazines 7, 11 and 13, respectively. Whereas 7 reacts with acrylonitrile to afford a [4+2] cycloaddition product with elimination of hydrogen sulphide, compounds 11 and 13 are not converte
The reactions of formaldehyde and acetaldehyde with active methylene compounds, followed by reaction with cyanoacetic acid hydrazide 2, afforded N-aminopyridine-2-one derivatives 5a-f. In contrast, the reactions of cyanoacetic acid hydrazide 2 with aliphatic aldehydes and cyanothioacetamide afforded