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ChemInform Abstract: Concise and Efficient Synthesis of 4-Hydroxy-2-pyrones from Pentane-2,4-diones.

โœ Scribed by Masahiro Yoshida; Hironobu Takai; Chika Mitsuhashi; Kozo Shishido

Publisher
John Wiley and Sons
Year
2011
Weight
31 KB
Volume
42
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