173544-82-6Relevant articles and documents
2-Aryl-3-hydroxyquinolones, a new class of dyes with solvent dependent dual emission due to excited state intramolecular proton transfer
Yushchenko, Dmytro A.,Shvadchak, Volodymyr V.,Klymchenko, Andrey S.,Duportail, Guy,Mely, Yves,Pivovarenko, Vasyl G.
, p. 774 - 781 (2007/10/03)
Herein, the fluorescence properties of a series of 2-aryl-3- hydroxyquinolones (3HQs) were investigated and compared with the properties of well-studied 3-hydroxyflavone. All these compounds were found to display dual fluorescence with well-separated band
Preparation of 1,2-disubstituted-3-hydroxy-4(1H)-quinolinones and the influence of substitution on the course of cyclization
Hradil, Pavel,Hlavac, Jan,Lemr, Karel
, p. 141 - 144 (2007/10/03)
Synthesis of 1,2-disubstituted-3-hydroxy-4(1H)-quinolinones by the cyclization of N-substituted phenacyl or acetonyl anthranilates is described. Two methods were employed for cyclization of anthranilates. Heating in polyphosphoric acid has a wide scope of applicability. The thermal cyclization in boiling N-methylpyrrolidone is limited by steric effect.
Synthetic Routes to 1,5-Dihydro-5-oxo-4,1-benzoxazepines and to 5-Oxooxazoloquinolines
Gandhi, Sham S.,Bell, Karen L.,Gibson, Martin S.
, p. 13301 - 13308 (2007/10/02)
The literature concerning phenacyl anthranilate, N-phenacylanthranilic acid and phenacyl N-phenacylanthranilate is clarified.Phenacyl anthranilate is dehydrated to 1,5-dihydro-5-oxo-2-phenyl-4,1-benzoxazepine by treatment with phosphoryl chloride; other examples of this reaction are described.A preparation of 4-methyl-5-oxo-2-phenyloxazoloquinoline from N-phenacylanthranilic acid and propionic anhydride is reported.