Process for the production of 3-vinyl cephalosporins
    9.
    发明授权
    Process for the production of 3-vinyl cephalosporins 失效
    生产3-乙烯基头孢菌素的方法

    公开(公告)号:US06414140B2

    公开(公告)日:2002-07-02

    申请号:US09792800

    申请日:2001-02-23

    IPC分类号: C07D50122

    CPC分类号: C07D501/00

    摘要: A process for the production of a 3-vinylcephalosporin compound of formula I wherein R1 and R2 denote hydrogen or an organic group by a Wittig reaction reacting first a compound of formula II with a compound of formula P(R4)3 or P(OR4)3 to produce a compound of formula III and secondly reacting the compound of formula III with a weak base of formula or of formula R10—COO−W+ wherein R5 is hydrogen, alkly or aryl and R6 and R7 are each an activated group of formula —COOR8, —CN, —SO2R8, —COR8 or —CON(R8)2; or R5 and R8 are each aryl and R7 is an activated group of formula —COOR8, —CN, —SO2R8, —COR8 or —CON(R8)2, W+ is an alkali metal cation and R10 is alkyl or aryl to produce a compound of formula IV and finally reacting a compound of formula IV with a compound of formula V to produce a compound of formula I.

    摘要翻译: 制备式I的3-乙酰头孢菌素化合物的方法,其中R1和R2通过维蒂希反应表示氢或有机基团,首先将式II化合物与式P(R4)3或P(OR4)3的化合物反应至 制备式III化合物,其次使式III化合物与式R 10 -COO-W +的弱碱反应,其中R 5是氢,烷基或芳基,R 6和R 7各自是式-COOR 8,-CN的活化基团 ,-SO 2 R 8,-COR 8或-CON(R 8)2; 或R 5和R 8各自为芳基,R 7为式-COOR 8,-CN,-SO 2 R 8,-COR 8或-CON(R 8)2的活化基团,W +为碱金属阳离子,R 10为烷基或芳基, 然后最终使式Ⅳ化合物与式Ⅴ化合物反应,生成式Ⅰ化合物。

    Cephalosporin synthesis
    10.
    发明授权
    Cephalosporin synthesis 失效
    头孢菌素合成

    公开(公告)号:US6063917A

    公开(公告)日:2000-05-16

    申请号:US164055

    申请日:1998-09-30

    摘要: A process for the production of a compound of formula ##STR1## wherein R.sup.a denotes hydrogen or silyl;R.sup.b denotes a group of formula --OR.sup.e, whereinR.sup.e denotes hydrogen or alkyl; andR.sup.c and R.sup.d together denote a bond;in free form or in salt form,which process comprises the step of spitting, in the presence of ozone, the double bond in position 3 of the ring structure of a compound of formula III ##STR2## wherein R.sub.2 and R.sub.3 are the same or different and independently of each other denote hydrogen or an organic group, and X.sup.- denotes the anion of an inorganic or organic acid and optionally silylating the amine group in position 7 of the ring system.

    摘要翻译: 制备下式化合物的方法其中R a表示氢或甲硅烷基; Rb表示式-OR的基团,其中Re表示氢或烷基; Rc和Rd一起表示键; 游离形式或盐形式,该方法包括在臭氧存在下吐出式III化合物的环结构位置3上的双键的步骤,其中R2和R3相同或不同并且独立地 彼此表示氢或有机基团,X表示无机或有机酸的阴离子,并且任选地使环系的位置7中的胺基甲硅烷基化。