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Syntheses of some new coumarin-quinolone carboxylic acids

✍ Scribed by Mladen Trkovnik; Zrinka Ivezić

Publisher
Journal of Heterocyclic Chemistry
Year
2000
Tongue
English
Weight
294 KB
Volume
37
Category
Article
ISSN
0022-152X

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✦ Synopsis

Abstract

Aminocoumarin derivatives 3‐10 were condensed with diethyl ethoxymethylenemalonate to give intermediates 11‐18. Thermal cyclizations of intermediates give benzopyranopyridinecarboxylates 19‐26. These esters were hydrolyzed to the corresponding benzopyranopyridine carboxylic acids 27‐34.

📜 SIMILAR VOLUMES

ChemInform Abstract: Syntheses of Some N
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✍ Mladen Trkovnik; Zrinka Ivezic 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 31 KB 👁 1 views

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## Abstract A modification of the Gould‐Jacobs reaction, particularly useful for the preparation of N‐alkyl‐4‐quinolone‐3‐carboxylic acids, is described. Decarboxylation of these acids leads to N‐alkyl‐4‐quinolones or, in the case of N‐ethyl‐benzo[h]‐4‐quinolone‐3‐carboxylic acid, to 4‐ethoxy‐benzo