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A Facile Synthesis of 4-Hydroxycoumarin and 4-Hydroxy-2-quinolone Derivatives.

โœ Scribed by Su-Jin Park; Jong-Cheol Lee; Kee-In Lee

Publisher
John Wiley and Sons
Year
2007
Weight
20 KB
Volume
38
Category
Article
ISSN
0931-7597

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Et 2 AlCl-Promoted Coupling Reactions of 4-Hydroxy-2-pyrone or 4-Hydroxycoumarin with Aldehydes: Synthesis of Methylenebis(4hydroxy-2-pyrone) or Methylenebis(4-hydroxycoumarin) Derivatives. -Condensation of pyrone derivatives (I) with aldehydes (II) in the presence of Et 2 AlCl easily affords the me