[EN] CHIRAL 1-(4-METHYLPHENYLMETHYL)-5-OXO-{N-[(3-T-BUTOXYCARBONYL- AMINOMETHYL)]-PIPERIDIN-1-YL}-PYRROLIDINE-2-CARBOXAMIDES AS INHIBITORS OF COLLAGEN INDUCED PLATELET ACTIVATION AND ADHESION<br/>[FR] 1-(4-MÉTHYLPHÉNYLMÉTHYL)-5-OXO-{N-[(3-T-BUTOXYCARBONYLAMINOMÉTHYL)]-
申请人:COUNCIL SCIENT IND RES
公开号:WO2012104866A1
公开(公告)日:2012-08-09
Chiral l-(4-methylphenylmethyl)-5-oxo-N-[(3-t-butoxycarbonyl-aminomethyl)]- piperidin-l-yl}-pyrrolidine-2-carboxamides as inhibitors of collagen induced platelet activation and adhesion The present invention provides chiral (2S)-l-(4-methylphenylmethyl)-5-oxo-(3S)-N-[(3-t- butoxycarbonyl aminomethyl)]-piperidin-l-yl}-pyrrolidine-2-carboxamide, and (2S)-1-(4- methylphenylmethyl)-5-oxo-(3R)-N-[(3-t-butoxycarbonyl amino methyl)]-piperidin-l-yl}- pyrrolidine-2-carboxamide of formula 6 and 7 respectively. The present invention also relates to use of these moieties as inhibitors of collagen induced platelet adhesion and aggregation mediated through collagen receptors. The present invention provides a process for preparation of chiral carboxamides of formula 6 and 7 using the process which has advantage to avoid any racemization at the a-carboxylic center, during N-alkylation. The reagent LiHMDS is used at low temperatures to furnish methyl N-(p- methylphenylmethyl)lpyroglutamate in good chiral purity.
手性l-(4-甲基苯甲基)-5-氧-N-[(3-t-丁氧羰基氨甲基)]-哌啶-1-基}-吡咯烷-2-羧酰胺作为胶原诱导的血小板活化和粘附的抑制剂。本发明提供手性(2S)-l-(4-甲基苯甲基)-5-氧-(3S)-N-[(3-t-丁氧羰基氨甲基)]-哌啶-1-基}-吡咯烷-2-羧酰胺和(2S)-1-(4-甲基苯甲基)-5-氧-(3R)-N-[(3-t-丁氧羰基氨甲基)]-哌啶-1-基}-吡咯烷-2-羧酰胺,分别为公式6和7。本发明还涉及使用这些分子作为通过胶原受体介导的胶原诱导的血小板粘附和聚集的抑制剂。本发明提供了一种制备公式6和7的手性羧酰胺的方法,该方法具有避免在N-烷基化过程中α-羧基中发生任何消旋的优点。在低温下使用试剂LiHMDS可提供良好的手性纯度的甲基N-(对甲基苯甲基)吡咯酰胺。