Mesoionische Sechsringheterocyclen, V Pyridinium-Ylide von Malonylheterocyclen / Mesoionic Sixmembered Heterocycles, V Pyridinium Ylides of Malonylheterocycles
Open Access
- 1 October 1975
- journal article
- Published by Walter de Gruyter GmbH in Zeitschrift für Naturforschung B
- Vol. 30 (9-10) , 773-777
- https://doi.org/10.1515/znb-1975-9-1023
Abstract
The reaction of 3,3-dichloro-2,4-dioxo-tetrahydroquinolines with pyridine yields the corresponding pyridinium ylides. However, the reaction of 3-diazo-2,4-dioxo-tetrahydroquinolines with pyridine in the presence of copper gives Cu complexes of 4,4′-dihydroxy-3,3′-azo-2-quinolones.Keywords
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