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Journal ArticleDOI

A convenient synthesis of 2- and 2,3-substituted 4H-chromen-4-ones

Ichiro Hirao, +2 more
- 01 Jan 1984 - 
- Vol. 1984, Iss: 12, pp 1076-1078
TLDR
Synthese de R-2 chromenones-4 par transposition de Claisen cyclisation a partir de RCOO-2' acetophenones; synthetse de Naphto [1,2-b] pyrannones 4 a partire d'acetyl-2 RCOO -1 naphtalenes as discussed by the authors.
Abstract: 
Synthese de R-2 chromenones-4 par transposition de Claisen puis cyclisation a partir de RCOO-2' acetophenones; synthese de R-2 methyl-3 chromenones-4 a partir de RCOO-2' propiophenones; synthese de R-3 naphto [1,2-b] pyrannones-4 a partir d'acetyl-2 RCOO-1 naphtalenes

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Journal ArticleDOI

Chromone: A Valid Scaffold in Medicinal Chemistry

Alexandra Gaspar, +7 more
- 21 Feb 2014 - 
TL;DR: This work was supported by the Foundation for Science and Technology (FCT), Portugal (projects PTDC/QUI-QUI/113687/2009 and PEst-C/QUI/UI0081/2013) and SFRH/BD/61262/2009.
Journal ArticleDOI

Metabolism of Dibenzofuran by Pseudomonas sp. Strain HH69 and the Mixed Culture HH27

Peter Fortnagel, +7 more
- 01 Apr 1990 - 
TL;DR: Evidence is given for a novel type of dioxygenases responsible for the attack on the biarylether structure of the dibenzofuran molecule and a meta-fission mechanism for cleavage of the dihydroxylated aromatic nucleus of 2,2',3-trihydroxybiphenyl is suggested as the next enzymatic step in the degradative pathway.
Journal ArticleDOI

Microwave-assisted synthesis of functionalized flavones and chromones

George W. Kabalka, +1 more
- 12 Sep 2005 - 
TL;DR: A facile microwave synthesis of functionalized flavones and chromones via the cyclization of 1-(2-hydroxyaryl)-3-aryl-1,3-propanedione is described in this article.
Journal ArticleDOI

K2CO3-catalyzed synthesis of chromones and 4-quinolones through the cleavage of aromatic C-O bonds.

Jie Zhao, +2 more
- 01 Jun 2012 - 
TL;DR: K(2)CO(3)-catalyzed intramolecular cyclization of 1-alkoxyphenyl)-3-akylpropane-1,3-dione and 3-alkylimino derivatives via the selective cleavage of aromatic C-O bonds is reported and the corresponding chromone and 4-quinolone derivatives were obtained in reasonable yields.
Journal ArticleDOI

Ionic liquid mediated Cu-catalyzed cascade oxa-Michael-oxidation: efficient synthesis of flavones under mild reaction conditions

Zhiyun Du, +4 more
- 28 Sep 2011 - 
TL;DR: A highly efficient synthetic method of CuI-catalyzed cascade oxa-Michael-oxidation, using chalcones as substrates, mediated by the ionic liquid at a low temperature has demonstrated high synthetic utility and can afford flavones in good to high yields.