Fe3+-montmorillonite as a cost-effective and recyclable solid acidic catalyst for the synthesis of xanthenediones

Fe3+-montmorillonite was first used as a solid acidic catalyst for the synthesis of xanthenedione derivatives through condensation reactions between aromatic aldehydes and dimedone. This process provides several advantages such as good yields of products, simple operation, convenient separation, and inexpensive and recyclable catalyst.