| 摘要 |
This invention relates to (2R,3S,4R,5R)-2-amino-5-methylpiperidine-3,4-diol or a (2S,3S,4R,5R)-2-N-substituted-2-amino-5-methylpiperidine-3,4-diol represented by the general formula (I): <CHEM> wherein R<1> and R<2> each are a hydrogen atom, or R<1> is a hydrogen atom and R<2> is a lower alkanoyl group or a lower omega -trihaloalkanoyl group, or R<1> and R<2> together denote phthaloyl group, and a pharmaceutically acceptable salt thereof. Said compound can be prepared from a (2S,3S,4R)-5-N-protected-2,3,4-O-tri-protected-5-aminopentane-1,2,3,4- tetraol by multi-steps of reactions. |
