| Autor: |
Kühn, Christiane, Beckert, R., Grummt, U.-W., Käpplinger, C., Birckner, E. |
| Zdroj: |
Zeitschrift für Naturforschung B; April 2004, Vol. 59 Issue: 4 p406-413, 8p |
| Abstrakt: |
In order to obtain sulfur-containing tetraazafulvalenes the derivatives 1 - 3 were cross-coupled with different types of acetylenes via palladium-catalyzed reactions. Starting from the tetrabromoaryl derivative 3a, four bromine atoms could be replaced by 2-ethynylthiophene. Under analogous conditions, the methylsulfanyl esters 7 -11 could be obtained by employing 4-ethynylbenzoic acid 4-(methylsulfanyl)butylester 6. Lipoic acid could be integrated into tetraazafulvalenes successfully in a two step reaction. First, the Sonogashira coupling method yielded the compound 12 possessing two (4-anilino)ethynyl residues which were then condensed with lipoic acid to give derivative 13. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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