The condensation of pyridine-2,4,6-tricarboxtrisamidrazone 1 with 1,2-dicarbonyl compounds 2 -3 leads to trisubstituted 1,2,4-triazines 4 -6. These 1,2,4-triazines can be easily transformed to superbranched pyridines 7 -9 by [4+2] cycloaddition with norborna-2,5-diene followed by [4+2] cycloreversio
The rotational degenerated bipolar coordinate system and its new applications
β Scribed by Weigan Lin
- Publisher
- Elsevier Science
- Year
- 1991
- Tongue
- French
- Weight
- 814 KB
- Volume
- 26
- Category
- Article
- ISSN
- 0304-3886
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π SIMILAR VOLUMES
In the rf SQUID system, the rf voltage of the L-C resonant circuit is modulated periodically by the magnetic flux applied to the SQUID element. The voltage change of the resonant circuit is typically of the order of 10/aV. Some devices have been reported to enhance the voltage output)'2 We have foun
The condensation of 1,10-phenanthroline-5,6-dione 1 with amidrazones 2 leads to 6-hetaryl-substituted 1,2,4,8,9-pentaazatriphenylenes 3. These condensed 1,2,4-triazines can be easily transformed to pyridines by [4+2] cycloaddition with norborna-2,5-diene followed by [4+2] cycloreversions of nitrogen