Synthesis of Flavones and [gamma]-Benzopyranones Using Mild Sonogashira Coupling and 18-Crown-6 Ether Mediated 6-endo Cyclization

An efficient method for the synthesis of flavones and [gamma]-benzopyranones has been developed utilizing a mild Sonogashira coupling and 18-crown-6 ether mediated 6-endo cyclization of o-alkynoylphenyl acetates. By using this strategy, flavones and [gamma]-benzopyranones bearing electron-donating g...

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Veröffentlicht in:European journal of organic chemistry 2012-08, Vol.2012 (24), p.4533
Hauptverfasser: Chuang, Da-Wei, El-Shazly, Mohamed, Balaji D, Barve, Chung, Yu-Ming, Chang, Fang-Rong, Wu, Yang-Chang
Format: Artikel
Sprache:eng
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Zusammenfassung:An efficient method for the synthesis of flavones and [gamma]-benzopyranones has been developed utilizing a mild Sonogashira coupling and 18-crown-6 ether mediated 6-endo cyclization of o-alkynoylphenyl acetates. By using this strategy, flavones and [gamma]-benzopyranones bearing electron-donating groups, halogens, and simple alkyl substituents were synthesized in satisfactory yields. [PUBLICATION ABSTRACT]
ISSN:1434-193X
1099-0690
DOI:10.1002/ejoc.201200529