2-n-substituted or unsubstituted-2-amino-5-methylpiperidine-3,4-diols and processes for the preparation thereof
申请人:Zaidan Hojin Biseibutsu Kagaku Kenkyu Kai
公开号:US06610709B1
公开(公告)日:2003-08-26
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 &ohgr;-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.
该发明涉及(2R,3S,4R,5R)-2-氨基-5-甲基哌啶-3,4-二醇或由通式(I)表示的(2S,3S,4R,5R)-2-N-取代-2-氨基-5-甲基哌啶-3,4-二醇,其中R1和R2分别为氢原子,或R1为氢原子且R2为较低的烷酰基或较低的ω-三卤代烷酰基,或R1和R2一起表示邻苯二甲酰基,并且其药学上可接受的盐。所述化合物可以通过多步反应从(2S,3S,4R)-5-N-保护-2,3,4-O-三保护-5-氨基戊烷-1,2,3,4-四醇制备而成。