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A novel heterogeneous strong acid catalyst has been synthesized through the copolymerization of p-toluenesulfonic acid and paraformaldehyde with sulfuric acid as catalyst. The novel catalyst owns the strong acidity as much as 4.0 mmol/g, while Nafion and Amberlyst-15 only has the acidity of about 0.8 mmol/g. Furthermore, the catalyst possesses the advantages of the high thermal stability (200 °C)...
The novel efficient procedure has been developed for the oxathioacetalization of carbonyl compounds and 2-mercaptoethanol at room temperature under solvent-free condition. The results showed that the novel multi-SO3H functionalized ionic liquid was very efficient for the reactions with the good to excellent yields in short time. Operational simplicity, without need of any solvent, room temperature,...
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