期刊
IRANIAN JOURNAL OF CATALYSIS
卷 5, 期 4, 页码 373-381出版社
ISLAMIC AZAD UNIV, SHAHREZA BRANCH
关键词
Sulfonated rice husk ash; Trimethylsilylation; Tetrahydropyranylation; Methoxymethylation; Protection
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, H-1 NMR and (CNMR)-C-13 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.
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