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):
wherein R1 and R2 each are a hydrogen atom, or R1 is a hydrogen atom and R2 is a lower alkanoyl group or a lower ω-trihaloalkanoyl group, or R1 and R2 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.
本发明涉及通式(I)代表的(2R,3S,4R,5R)-2-
氨基-5-甲基
哌啶-3,4
-二醇或(2S,3S,4R,5R)-2-N-取代的-2-
氨基-5-甲基
哌啶-3,4
-二醇:
其中 R1 和 R2 各为氢原子,或 R1 为氢原子,R2 为低级烷酰基或低级ω-三卤代烷酰基,或 R1 和 R2 共同表示
邻苯二甲酰基团,及其药学上可接受的盐。
所述化合物可由(2S,3S,4R)-5-N-保护-2,3,4-O-三保护-5-
氨基
戊烷-1,2,3,4-四醇通过多步反应制备。