Fused pyridine derivatives R 0450 Synthesis and Antibacterial Activity of 3-Aryl-4-formyl-1-[3-(3-chlorophenyl)-1,8-naphthyridin-2-yl]pyrazoles. -The via Vilsmeier-Haack reaction synthesized compounds (V) only exhibit medium antibacterial activity. -(MOGILAIAH*, K.; VIDYA, K.; KAVITHA, S.; KUMAR, K. S.; Indian J. Chem., Sect. B: Org. Chem.
Das Keton (I) bildet mit den aromatischen Aldehyden (II) in Gegenwart verschiedener Basen und bei unterschiedlichen Reaktionstemperaturen und Reaktionsdauer die Kondensationsprodukte (III), in denen vermutlich die sperrigen Gruppen trans zueinander sind.
Acetylaceton (I) liefert bei der Knoevenagel‐Kondensation mit den Aldehyden (II) in Gegenwart verschiedener Basen wie Pyridin, Piperidin, α‐Picolin, Pyridin‐Acetanhydrid oder Triäthylamin‐ Acetanhydrid die Produkte (III).
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