Pyranoquinolines. Part I. Syntheses and ultraviolet absorption characteristics of 6-chloro-4H-pyrano[3,2-h]quinoline-4-ones

6-Chloro-2-phenyl and 2-p-anisyl-4H-pyrano[3,2-h]quinoline-4-ones, their 2,3-dihydro and 3-hydroxy derivatives, and 6-chloro-3-benzoyl-2-phenyl-4H-pyrano[3,2-h]quinoline-4-one are synthesized by the application of appropriate flavonoid syntheses to 5-chloro-7-acetyl-8-hydroxyquinoline ( 5 ). 5 was f...

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Bibliographic Details
Published inCanadian journal of chemistry Vol. 47; no. 1; pp. 105 - 112
Main Authors Patel, D. R, Choxi, C. S, Patel, S. R
Format Journal Article
LanguageEnglish
Published Ottawa, Canada NRC Research Press 01.01.1969
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Summary:6-Chloro-2-phenyl and 2-p-anisyl-4H-pyrano[3,2-h]quinoline-4-ones, their 2,3-dihydro and 3-hydroxy derivatives, and 6-chloro-3-benzoyl-2-phenyl-4H-pyrano[3,2-h]quinoline-4-one are synthesized by the application of appropriate flavonoid syntheses to 5-chloro-7-acetyl-8-hydroxyquinoline ( 5 ). 5 was formed on Friedel-Crafts acetylation of 5-chloro-8-methoxy and -8-hydroxyquinolines. Ultraviolet spectra of 5 are studied at three different pH's in aqueous ethanol and those of the pyranoquinolines are studied in ethanolic solutions and compared with those of their corresponding simple flavonoids.
ISSN:0008-4042
1480-3291
DOI:10.1139/v69-013