期刊
NEW JOURNAL OF CHEMISTRY
卷 42, 期 6, 页码 4251-4260出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7nj05185a
关键词
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资金
- University of Aveiro
- FCT/MEC - FEDER [FCTUID/QUI/00062/2013]
- FCT [SFRH/BD/86277/2012]
A series of novel (E)-2-(2-propargyloxystyryl)chromones and (E,E)-2-[4-(2-propargyloxyphenyl)buta-1,3-dien-1-yl]chromones were designed and synthesized via aldol condensation of 2-methylchromones with 2-propargyloxy(benzaldehyde and cinnamaldehyde), respectively. Both chromone derivatives were used as substrates in microwave-assisted intramolecular Diels-Alder reactions, affording chromeno[3,4-b]xanthones and 2-(benzo[c]chromenyl)chromones. This is the first report involving chromone derivatives in intramolecular Diels-Alder reactions for the synthesis of new oxygen heterocycles, namely xanthone- and flavone-type compounds.
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