U. S. Priskoka

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5-Phenyl-1,3,4-oxadiazole-2-thiol is glycosylated easily and in high yields with 2-acetamido-3,4,6-tri-O-acetyl-2-deoxy-α-D-glucopyranosyl chloride in the presence of catalytic amounts of aliphatic and aromatic crown ethers under phase transfer (solid-organic solvent) conditions. The reaction rate and the ratio of the resulting N-and S-regioisomers depend(More)
Glycosylation of phenols with α-D-glucosaminyl chloride peracetate catalyzed by polyethylene glycol (PEG) was carried out in a solid-liquid phase transfer system at room temperature. The results were compared with those previously obtained for the catalysis with various crown ethers. The catalytic activity of PEG in this reaction was found to be comparable(More)
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