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Abstract
New synthetic methods for the preparation of 6-deoxy-1,2-O-isopropylidene-α-d-xylo-hexofuranos-5-ulse (VIa) were described.
Methyl 2,3,4-tri-O-benzoyl-6-deoxy-α-d-arabino-hex-5-enopyranoside (IIIa) was synthesized starting from methyl α-d-altroside (IIa). This enose derivative (IIIa) was hydrolyzed to methyl 6-deoxy-α-d-arabino-hex-5-enopyranoside (IIIb), and then converted with acid into 6-deoxy-d-arabino-hexofuranos-5-ulose (I), the sugar component of antibiotic hygromycin A.