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Novel α- and β-stereocontrolled glycosidations using a heterogeneous solid acid, sulfated zirconia (SO 4 /ZrO 2 ), as an activator have been developed. The glycosidations of manno- and 2-deoxyglucopyranosyl α-fluorides with several alcohols using SO 4 /ZrO 2 in MeCN proceeded α-stereoselectively, while those with the same activator in the presence of MS 5A in Et ...
The environmentally benign and stereocontrolled glycosidations of mannopyranosyl sulfoxides and alcohols using a heterogeneous solid acid, Nafion-H or sulfated zirconia (SO 4 /ZrO 2 ) as a new activator for the direct syntheses of both the α- and β-mannopyranosides have been developed.
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