Journal
JOURNAL OF THE IRANIAN CHEMICAL SOCIETY
Volume 15, Issue 4, Pages 823-829Publisher
SPRINGER
DOI: 10.1007/s13738-017-1281-z
Keywords
Multicomponent; C3-pyranopyrazole-substituted coumarin; Solvent free; Microwave synthesis
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An efficient and rapid method was developed for the synthesis of C3-pyranopyrazole-substituted coumarins from one-pot five-component reaction of beta-keto ester, hydrazine, O-hydroxy aromatic aldehydes, 6-methyl, 4-hydroxy pyranone and aromatic aldehyde in the presence of tri-ethylamine in solvent-free conditions. The microwave-assisted method reported herein offers advantageous shorter reaction times, higher yields and cleaner reaction compared with conventional heating methods.
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