<b>Solvent-free synthesis of xanthene derivatives by Preyssler type heteropolyacid</b>

Abstract

Dimedone reacted with aromatic aldehydes and 3,4-methylenedioxyphenol or β-naphthol in the presence of a catalytic amount of Preyssler type heteropolyacid, H₁₄[NaP₅W₃₀O₁₁₀], as a green and reusable catalyst under solvent-free conditions to form a variety of  new xanthene derivatives in very good  yields.

KEY WORDS: Xanthene derivatives, Solvent-free synthesis, Preyssler type heteropolyacid, 3,4-Methylene dioxyphenol, β-Naphthol, Three-component one-pot reactions

Bull. Chem. Soc. Ethiop. 2011, 25(3), 399-406.