In the present investigation, new heterogeneous catalyst pumice supported sulfonic acid (pumice@SO₃H) was prepared from natural pumice by simple agitation with chlorosulphonic acid. The catalytic performance of a pumice@SO₃H was investigated for the synthesis of 2,4,5-triaryl imidazoles and acridine-1,8-diones under microwave (MW) assisted solvent-free condition. The pumice@SO₃H was stable and exhibits a good Brønsted acidic character. The beneficial characteristic features observed with this protocol are the recyclability of catalyst, the solvent free approach, the applicability to a wide variety of substrates, good to excellent yields, and easy to use. The catalyst pumice@SO₃H with MW has been increased the green chemistry value of this method.

在本研究中，通过与氯磺酸的简单搅拌，由天然浮石制备了新型多相催化剂浮石负载的磺酸（浮石@SO ₃ H）。研究了浮石@SO ₃ H 在微波 (MW) 辅助无溶剂条件下合成 2,4,5-三芳基咪唑和吖啶-1,8-二酮的催化性能。pumice@SO ₃ H 是稳定的并且表现出良好的 Brønsted 酸性特征。使用该协议观察到的有益特性是催化剂的可回收性、无溶剂方法、适用于多种基材、良率至优异的产量以及易于使用。催化剂浮石@SO ₃H 与 MW 增加了该方法的绿色化学价值。