synthesis of dihydropyran derivatives using zrcl4@arabic gum catalyst in solvent-free conditions

In this article, a heterogeneous and recyclable lewis acid, zirconium chloride immobilized on arabic gum (zrcl4@arabic gum) was used for the synthesis of dihydropyran derivatives. accordingly, dihydropyran derivatives were synthesized with multicomponent reactions, without solvent, using different aldehydes in the presence of the mentioned catalyst at 50 °c. nano- zrcl4@arabic gum was used as a recyclable catalyst in organic synthesis. the advantages of this method compared to the previous works are high reaction efficiency, short time, simple operation, and catalyst recycling without significantly reducing the catalytic ability.