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Differential functionalization of the phenolic groups in Genistein by sequential silylation/acylation reactions, involving some unexpected regioselective O-silyl group replacement, is described.
Carbohydrates
Carbohydrates U 0500Stereoselective Synthesis of Alkyl α-D-Glucopyranosides. -Glycosylation of β-D-glucosyl-N-allylthiocarbamates with alcohols, including hindered tertiary alcohols, using bromine as activator proceeds under mild conditions in a highly stereoselective fashion to afford the corresponding α-glucosides (III) (5 examples) in high yields. -(KASPRZYCKA, A.; PASTUCH, G.; CYGANEK, A.; SZEJA, W.; Pol.
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