Efficient Knoevenagel Condensation Reactions Catalyzed by Activated Gel Zirconium(IV) Oxide

<table>The Knoevenagel condensation between substituted benzaldehydes <b> (1a–j)</b> and dimedone <b>(2)</b> in presence of ZrOCl<sub>2</sub><svg height="5.0124998" id="M29" style="vertical-align:-0.0pt" version="1.1" viewbox="0 0 4.5999999 5.0124998" width="4.5999999" xmlns="http://www.w3.org/2000/svg">
<g transform="matrix(1.25,0,0,-1.25,0,5.0125)">
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<text transform="matrix(1,0,0,-1,-71.95,68.04)">
<tspan style="font-size: 12.50px; " x="0" y="0">⋅</tspan>
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</svg>8H<sub>2</sub>O/NaNH<sub>2</sub> as catalysis to yield the product <b>(3a–j)</b>. </table>

Journal of Chemistry

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Scheme 1

Scheme 1: Efficient Knoevenagel Condensation Reactions Catalyzed by Activated Gel Zirconium(IV) Oxide 