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In this study, a sulfonic acid-functionalized β-ketoenamine linked porous organic polymer (POP-SO₃H) was strategically designed and synthesized through a solvothermal Schiff-base condensation reaction between 2,4,6-trihydroxybenzene-1,3,5-tricarbaldehyde and 2,4-diaminobenzenesulfonic acid. The incorporation of sulfonic acid groups and β-ketoenamine linkages imparts high acidity, chemical robustness, and thermal stability to the polymer network. The synthesized POP-SO₃H was thoroughly characterized by Powder X-ray Diffraction (PXRD), Fourier Transform Infrared Spectroscopy (FTIR), Thermogravimetric Analysis (TGA), Scanning Electron Microscopy (SEM), and X-ray Photoelectron Spectroscopy (XPS), confirming its crystalline integrity, functional group incorporation, morphological features, and elemental composition. Owing to its high surface area, acidic functionality, and porous architecture, POP-SO₃H was explored as a heterogeneous catalyst for the Biginelli reaction under mild reaction conditions. The polymer exhibited excellent catalytic activity, affording the corresponding dihydropyrimidinone products in high yields. Furthermore, the catalyst demonstrated good recyclability and stability over multiple reaction cycles without significant loss in activity, highlighting its potential as a sustainable and reusable catalyst for multicomponent organic transformations.

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Sulfonic Acid Functionalized Porous Organic Polymer for Biginelli Reaction

  • 会议论文

  • 发表日期：

    2025年

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  • T. P. Sreelakshmi,
  • P. V. Aswathy,
  • R. Kala

摘要

In this study, a sulfonic acid-functionalized β-ketoenamine linked porous organic polymer (POP-SO₃H) was strategically designed and synthesized through a solvothermal Schiff-base condensation reaction between 2,4,6-trihydroxybenzene-1,3,5-tricarbaldehyde and 2,4-diaminobenzenesulfonic acid. The incorporation of sulfonic acid groups and β-ketoenamine linkages imparts high acidity, chemical robustness, and thermal stability to the polymer network. The synthesized POP-SO₃H was thoroughly characterized by Powder X-ray Diffraction (PXRD), Fourier Transform Infrared Spectroscopy (FTIR), Thermogravimetric Analysis (TGA), Scanning Electron Microscopy (SEM), and X-ray Photoelectron Spectroscopy (XPS), confirming its crystalline integrity, functional group incorporation, morphological features, and elemental composition. Owing to its high surface area, acidic functionality, and porous architecture, POP-SO₃H was explored as a heterogeneous catalyst for the Biginelli reaction under mild reaction conditions. The polymer exhibited excellent catalytic activity, affording the corresponding dihydropyrimidinone products in high yields. Furthermore, the catalyst demonstrated good recyclability and stability over multiple reaction cycles without significant loss in activity, highlighting its potential as a sustainable and reusable catalyst for multicomponent organic transformations.