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A mild, efficient and alpha-selective glycosidation by using potassium dodecatungstocobaltate trihydrate as catalyst
Ezzat Rafiee1, Shahram Tangestaninejad, Mohammad H Habibi
1Department of Chemistry, University of Isfahan, Isfahan 81746-73441, Iran. e.rafiee@sci.ui.ac.ir
Bioorganic & Medicinal Chemistry Letters
|June 5, 2004
Abstract:
Treatment of tri-O-acetyl-d-glucal 1 with several alcohols in the presence of catalytic amount of POM (K(5)CoW(12)O(40).3H(2)O) as a heterogeneous, reusable, efficient and environmentally benign catalyst under neutral conditions and ambient temperature gave the corresponding 2,3-unsaturated glycopyranosides in excellent yields, with good anomeric selectivity. This catalyst proved to be not efficient for phenols.