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2017-2

Abstract In this study, various xanthene derivatives have
prepared efficiently through a simple method using choline
chloride/tin(II) chloride (ChCl·2SnCl2) deep eutectic
solvent (DES), alone, or in the presence of Fe3O4/ƛcarrageenan/
Zn(II) magnetic bionanocatalyst. In the
employed procedure, 2-naphthol derivatives have mixed
with aromatic or aliphatic aldehydes and the reactions have
been completed in the presence of DES at 90 °C in 1.5 h.
In addition, using DES/Fe3O4/ƛ-carrageenan/Zn(II), the
reaction time was reduced to 30 min. The employed DES
has been recycled four times without important loss of its
activity.

2017-2 | Professor Hossein Tavakol

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