National Changhua University of Education Institutional Repository : Item 987654321/16835
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Please use this identifier to cite or link to this item: http://ir.ncue.edu.tw/ir/handle/987654321/16835

Title: The Synthesis and Hydrolysis of Dimethyl Acetals Catalyzed by Sulfated Metal Oxides. An Efficient Method for Protecting Carbonyl Groups
Authors: Lin, Chiu-Hsun;Lin, Shawn D.;Yang, Yi-Hung;Lin, Tsung-Po
Contributors: 化學系
Keywords: Sulfated;Trimethyl orthoformate;Dimethyl acetal;Carbonyl;Hydrolysis
Date: 2001-05
Issue Date: 2013-06-05T09:36:26Z
Publisher: SpringerLink
Abstract: Sulfated metal oxides including SO4 2–/ZrO2, SO4 2–/TiO2, SO4 2–/HfO2, SO4 2–/Fe2O3, SO4 2–/SnO2, and SO4 2–/Al2O3 were highly efficient catalysts for the reaction of aldehydes and ketones with trimethyl orthoformate producing dimethyl acetals under mild reaction conditions. At room temperature, dimethyl acetal yields of 83–100% were obtained for the five carbonyl compounds chosen. These mesoporous solid acids also effectively catalyzed the hydrolysis of dimethyl acetal to regenerate the original carbonyl compounds in aqueous acetone. They not only provided an effective method for synthesizing dimethyl acetals of larger molecular size but also acted as a versatile catalyst for protecting and deprotecting carbonyl groups during organic synthesis.
Relation: Catalysis Letters, 73(2-4): 121-125
Appears in Collections:[Department of Chemistry] Periodical Articles

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