| 摘要 |
Disclosed is methyl 3-azido-4-C-cyano-2,3,4,6-tetradeoxy- alpha -D-arabino-hexopyranoside and processes for its preparation from methyl 3-azido-2,3,6-trideoxy- alpha -D-arabino-hexopyranoside via the 4-bromo-4-deoxy intermediate; wherein the two inversions of configuration at C-4 result in a net retention of the alpha -D-arabino stereochemistry.
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