Journal
RSC ADVANCES
Volume 6, Issue 85, Pages 82321-82329Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ra18661k
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Funding
- National Research Foundation of Korea (NRF) grant - Korea government (MSIP) [NRF-2014R1A2A1A11052391]
- Nano Material Technology Development Program [2012M3A7B4049675]
- Ministry of Education [2014R1A6A1031189]
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An efficient green synthesis of a wide range of N-nonsubstituted 2-pyridones via thermal multicomponent reactions of 4-oxo-4H-chromene-3-carbaldehydes with malonates and ammonium acetate under catalyst- and solvent-free conditions is described. This reaction proceeds through domino Knoevenagel condensation/Michael addition/ring opening/ring closure reactions. This protocol has several advantages, such as commercial availability, low toxicity, ease of handling, and environmental benignity. The potential application of the synthesized compounds as UV protecting materials was also evaluated.
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