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Issue 3, 2014
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Sustainable and selective synthesis of 3,4-dihydroquinolizin-2-one and quinolizin-2-one derivatives via the reactions of penta-3,4-dien-2-ones

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Abstract

In this paper, a novel and green methodology for the synthesis of 3,4-dihydroquinolizin-2-one derivatives via the tandem reactions of penta-3,4-dien-2-ones with pyridine, quinoline, or isoquinoline at rt in aqueous ethanol was developed. Notably, the reactions involved a convenient work-up of simple precipitation and filtration, and the solvent could be easily recycled. In addition, when the reactions were carried out at higher temperature over a prolonged reaction period, the in situ formed 3,4-dihydroquinolizin-2-ones could be dehydrogenated by molecular oxygen from air to afford quinolizin-2-ones with good efficiency.

Graphical abstract: Sustainable and selective synthesis of 3,4-dihydroquinolizin-2-one and quinolizin-2-one derivatives via the reactions of penta-3,4-dien-2-ones

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Article information


Submitted
09 Oct 2013
Accepted
27 Nov 2013
First published
27 Nov 2013

Green Chem., 2014,16, 1393-1398
Article type
Paper

Sustainable and selective synthesis of 3,4-dihydroquinolizin-2-one and quinolizin-2-one derivatives via the reactions of penta-3,4-dien-2-ones

X. Fan, Y. He, X. Zhang and J. Wang, Green Chem., 2014, 16, 1393
DOI: 10.1039/C3GC42093K

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