| 摘要 |
A process for the preparation of N-(2-hydroxyethyl)- 2-hydroxymethyl-3,4,5-trihydroxypiperidines of the formula (see formula I), which comprises reacting a compound of the formula (see formula II) with glyoxal of the formula (see formula III) in a solvent to give the addition product (see formula IV) and reducing such addition product (II) with a hydrogen donor reducing agent to produce the intermediates of the formula (see formula I) and then the end product (I).
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