Abstract
Sevelamer (polyallyamine resin)-supported sulfonic acid (S-SO3H) has been prepared from the reaction of sevelamer with chlorosulfonic acid and characterized using FT-IR spectroscopy, scanning electronmicroscopy (SEM) and thermogravimetric analysis (TGA). The catalytic activity of S-SO3H was investigated in the synthesis of 1,8-dioxo-octahydroxanthene derivatives. All of the reactions were fast and gave excellent yields. The catalyst was easily recovered and reused for 5 runs without significant loss of its catalytic activity.
Highlights
Heterogeneous catalysis involving functional polymers has been very important over the past few decades [1,2,3]
Preparation of S‐SO3H The synthetic strategy used to prepare S-SO3H is shown in Scheme 1
Sevelamer was synthesized according to our previous work
Summary
Heterogeneous catalysis involving functional polymers has been very important over the past few decades [1,2,3]. The use of solid acids in organic synthesis and the industrial manufacture of materials is of increasing importance [10]. Functional polymers used as the solid support are very important for the definition of efficient synthetic procedures especially when safer reaction media, ecofriendly alternatives to organic solvents or solvent-free conditions (SolFC) are used. Typical procedure for the preparation of support s Polyallylamine hydrochloride (5.0 g) was dissolved in water (75.0 mL) to obtain a clear solution at 30 °C.
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