Intermediates for and synthesis of 3-methylene cephams
    8.
    发明授权
    Intermediates for and synthesis of 3-methylene cephams 失效
    3-亚甲基cephams的中间体和合成

    公开(公告)号:US06683176B2

    公开(公告)日:2004-01-27

    申请号:US09958857

    申请日:2001-12-31

    IPC分类号: C07D50122

    摘要: The present invention relates to novel processes for the preparation of 3-methylenecephams. More specifically, the present invention relates to the intramolecular cyclization of penicillin sulfoxide derived monocyclic azetidinone derivatives with organometallic catalysts of the formula III. MEx(H2O)y  (III) wherein: M is Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Zr, Hf, Th, Nb, Ta, U, Bi, or In; E is O[SO2(C1-C6 polyfluoroalkyl)], N[SO2(C1-C6 polyfluoroalkyl)]2, or C[SO2(C1-C6 polyfluoroalkyl)]3; x is 3; y is 0, 1, 2, 3, 4, 5, 6, 7, 8, or 9.

    摘要翻译: 本发明涉及制备3-亚甲基脑炎的新方法。 更具体地说,本发明涉及由式III的有机金属催化剂衍生的青霉素亚砜衍生的单环氮杂环丁酮衍生物的分子内环化,其中M为Sc,Y,La,Ce,Pr,Nd,Sm,Eu,Gd,Tb, Dy,Ho,Er,Tm,Yb,Lu,Zr,Hf,Th,Nb,Ta,U,Bi或In; E是O [SO2(C1-C6多氟烷基)],N [SO2(C1-C6多氟烷基 )] 2或C [SO 2(C 1 -C 6多氟烷基)] 3; x为3; y为0,1,2,3,4,5,6,7,8或9。