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γ-Al2O3-Supported 12-Tungstosilicic Acid as an Efficient Heterogeneous Catalyst for the Synthesis of α-Aminonitrile

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Introduction of titania sulfonic acid (TiO₂-SO₃H) as a new, efficient, and reusable heterogenous solid acid catalyst for the synthesis of biscoumarins

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Bioglycerol-Based Sulfonic Acid-Functionalized Carbon Catalyst as an Efficient and Reusable Catalyst for One-Pot Synthesis of 3- Substituted-2H-1,4-Benzothiazines

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