Author/Authors :
Shirini، Farhad نويسنده Department of Chemistry, College of Science, University of Guilan, Rasht , , Abedini، Masoumeh نويسنده Department of Chemistry, College of Science, University of Guilan, Rasht, zip code 41335, I.R. Iran , , Shamsi-Sani، Mahnaz نويسنده Department of Chemistry, College of Science, University of Guilan, Rasht, Zip code 41335, I.R. Iran , , Seddighi، Mohadeseh نويسنده University of Guilan, Rasht 41335-19141, Iran ,
Abstract :
A mild, efficient and fast method for the trimethylsilyl (TMS), tetrahydropyranyl (THP) and methoxymethyl (MOM) protection of alcohols and phenols in the presence of sulfonated rice husk ash (RHA-SO3H) is reported. All reactions were performed at room temperature in high to excellent yields. All the products are separated and compared with authentic samples and/ or identified using different types of methods including FT-IR, 1H NMR and 13CNMR spectroscopy. Ease of the preparation and handling of the catalyst, heterogeneous reaction conditions, reusability of the catalyst, easy work-up procedure and short reaction times are the main advantages of this method, which make this procedure useful and attractive addition to the available methods.
