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    • 6. 发明公开
    • Process for obtaining enantiomers of duloxetine precursors
    • Verfahren zur Herstellung enantomerer Ausgangsverbindungen von Duloxetin
    • EP1826204A1
    • 2007-08-29
    • EP06380038.7
    • 2006-02-28
    • LABORATORIOS DEL DR. ESTEVE, S.A.
    • Torrens Jover, AntoniBuschmann, Helmut HenrichDahmen, StefanLormann, Matthias
    • C07D333/12C07D333/14C07D333/24
    • C07D333/24C07D333/12C07D333/14Y02P20/55
    • The present invention is directed to a process for the preparation of an enantiomerically enriched compound of formula II

      wherein,
      R 1 , R 2 and R 3 are each independently selected from hydrogen, halogen, substituted or unsubstituted lower alkyl or substituted or unsubstituted aryl;
      X is -C(=O)-Z or -Y, wherein -Y is selected from -CH 2 -OR 4 , -CH 2 -halogen or - CH 2 -NR 6 R 7 ;
      wherein
      Z is selected from -NR 6 R 7 or -OR 5 , wherein R 5 is selected from hydrogen, substituted or unsubstituted lower alkyl or ester activating group;
      R 4 is selected from hydrogen, hydroxyl protecting group or hydroxyl activating group;
      R 6 and R 7 are each independently selected from hydrogen, amino protecting group, amido protecting group or substituted or unsubstituted lower alkyl;

      which comprises an enantioselective addition with a thienyl zinc reagent, in the presence of a chiral ligand.
    • 本发明涉及一种制备对映体富集的式II化合物的方法,其中R 1,R 2和R 3各自独立地选自氢,卤素,取代或未取代的低级烷基或取代或未取代的芳基; X是-C(= O)-Z或-Y,其中-Y选自-CH 2 -OR 4,-CH 2 - 卤素或-CH 2 -NR 6 R 7; 其中Z选自-NR 6 R 7或-OR 5,其中R 5选自氢,取代或未取代的低级烷基或酯活化基团; R 4选自氢,羟基保护基或羟基活化基团; R 6和R 7各自独立地选自氢,氨基保护基,酰氨基保护基或取代或未取代的低级烷基; 其包括在手性配体存在下用噻吩锌试剂进行对映选择性加成。