LiNH2BH3-promoted reductive opening of 8-substituted phenylglycinol-derived oxazolopiperidone lactams leads to enantiopure 4-substituted-5-aminopentanols, which are used as starting building blocks in the synthesis of the Haliclona alkaloids haliclorensin C, haliclorensin, and halitulin (formal). The starting lactams are easily accessible by a cyclocondensation reaction of (R)-phenylglycinol with racemic γ-subtituted
Dipeptidyl Peptidase-IV Inhibiting Compounds, Method Of Preparing The Same, And Pharmaceutical Compositions Containing The Same As An Active Agent
申请人:Lee Chang-Seok
公开号:US20080188471A1
公开(公告)日:2008-08-07
The present invention relates to novel compounds exhibiting good inhibitory activity versus Dipeptidyl Peptidase-IV (DPP-IV), methods of preparing the same and pharmaceutical compositions containing the same as an active agent.