OICC Press Iranian Journal of Catalysis 2345-4865 1 2 2024 02 03 Sulfuric acid ([3-(3-silicapropyl)-sulfanyl]propyl)ester as recyclable catalyst for the silylation of hydroxyl groups EN Farid Rohandeh Gachsaran Branch, Islamic Azad University, Gachsaran, Iran. Dariush Saberi Department of Chemistry, Faculty of Sciences, Persian Gulf University, Bushehr 75169 Iran. Khodabakhsh Niknam Department of Chemistry, Faculty of Sciences, Persian Gulf University, Bushehr 75169, Iran. Journal Article 2024 02 03 Sulfuric acid ([3-(3-silicapropyl)sulfanyl]propyl]ester (SASPSPE) is employed as a recyclable catalyst for the silylation of hydroxyl groups. A good range of primary, secondary alcohols and phenolic hydroxyl groups were effectively converted into their corresponding trimethylsilyl ethers with hexamethyldisilazane in the presence of catalytic amounts of SASPSPE at room temperature with short reaction times in good to excellent yields. This heterogeneous catalyst was recycled for nine runs without losing its catalytic activity.