一种镍基催化合成3-去氨甲酰基头孢呋辛酸的方法

    公开(公告)号:WO2021232694A1

    公开(公告)日:2021-11-25

    申请号:PCT/CN2020/126911

    申请日:2020-11-06

    Abstract: 一种镍基催化合成3-去氨甲酰基头孢呋辛酸的方法,包括以下步骤:将2-呋喃基-2-甲氧亚氨基乙酸和镍基催化剂置于反应装置中,再加入溶剂,搅拌均匀得到第一混合物;将3-氨基头孢烷酸溶解在氢氧化钠溶液中得到第二混合物;将所述第二混合物加入所述第一混合物中,进行第一反应,得到以下式3的化合物;向式3的化合物中加入碱液,进行第二反应,得到3-去氨甲酰基头孢呋辛酸,该方法可以大幅缩短目标化合物的合成步骤,且避免了三氯氧磷或五氯化磷等酰胺化试剂的使用,降低目标产物中反式异构杂质的含量,具有工艺操作简单,安全性可靠的特点。

    PROCESS FOR THE PREPARATION OF CEPHEM COMPOUNDS
    4.
    发明申请
    PROCESS FOR THE PREPARATION OF CEPHEM COMPOUNDS 审中-公开
    制备化合物的方法

    公开(公告)号:WO01098309A1

    公开(公告)日:2001-12-27

    申请号:PCT/JP2001/005163

    申请日:2001-06-15

    CPC classification number: C07D277/587 C07D501/00

    Abstract: A novel industrial process for preparing 7-[2-(2- amino- thiazol-4-yl)-2-lower-alkoxycarbonylmethoxyiminoacetamido] 3-cephem compounds of the general formula (I) or salts thereof (wherein R is an organic group; R is carboxyl or protected carboxyl; and R is lower alkyl), characterized by reacting a 7-amino-3-cephem compound of the general formula (II), a reactive derivative thereof obtained by modifying the amino group, or a salt thereof with a compound of the general formula (III) or a salt thereof (wherein X is halogeno).

    Abstract translation: 一种用于制备通式(I)的7- [2-(2-氨基 - 噻唑-4-基)-2-低级 - 烷氧基羰基甲氧基亚氨基乙酰氨基] 3-头孢烯化合物或其盐(其中R 1为 有机基团; R 2是羧基或保护的羧基; R 3是低级烷基),其特征在于使通式(II)的7-氨基-3-头孢烯化合物,其通过 用通式(III)的化合物或其盐(其中X为卤素)改性氨基或其盐。

    BETA-LACTAM PRODUCTION
    6.
    发明申请
    BETA-LACTAM PRODUCTION 审中-公开
    BETA-LACTAM生产

    公开(公告)号:WO00063214A1

    公开(公告)日:2000-10-26

    申请号:PCT/EP2000/003428

    申请日:2000-04-14

    CPC classification number: C07D501/00 C07F7/10 C07F7/1856 C07F7/1896

    Abstract: The present invention provides processes for the production of a compound of formula (IAbstract) wherein X, R1 and R2 are substituents conventional in cephalosporin chemistry; especially a compound of formula (IAbstract) is ceftriaxone, cefotaxime; e.g. in the form of a salt.

    Abstract translation: 本发明提供制备式(IAbstract)化合物的方法,其中X,R 1和R 2是头孢菌素化学中常规的取代基; 特别是式(IAbstract)的化合物是头孢曲松,头孢噻肟; 例如 以盐的形式。

    PROCESS FOR THE PREPARATION OF CEPHEM DERIVATIVES
    7.
    发明申请
    PROCESS FOR THE PREPARATION OF CEPHEM DERIVATIVES 审中-公开
    制备CEPHEM衍生物的方法

    公开(公告)号:WO1993010123A1

    公开(公告)日:1993-05-27

    申请号:PCT/KR1992000041

    申请日:1992-09-04

    CPC classification number: C07D501/00

    Abstract: A process for preparing β-lactam derivatives of formula (I), wherein R1 represents hydrogen or a metal salt; and R2 represents hydrogen, acetoxy methyl, (2,5-dihydro-2-methyl-6-hydroxy-5-oxo-as-triazin-3-yl)thiomethyl or (1-methyl-1H-tetrazol-5-yl)thiomethyl is disclosed. This process comprises the steps of (a) reacting triphenylphosphine and hexachloroethane or carbon tetrachloride with 2-(2-aminothiazol-4-yl)-2-syn-methoxyimino acetic acid in an organic solvent to give the corresponding acyloxyphosphonium chloride derivative of formula (II), and (b) acylating a previously silylated derivative of 7-ACA with this acyloxyphosphonium chloride derivative without its isolation.

    PROCESS FOR THE PREPARATION OF CEPHALOSPORIN ANTIBIOTIC
    10.
    发明申请
    PROCESS FOR THE PREPARATION OF CEPHALOSPORIN ANTIBIOTIC 审中-公开
    制备西酞普兰抗生素的方法

    公开(公告)号:WO2005019227A1

    公开(公告)日:2005-03-03

    申请号:PCT/IB2004/001287

    申请日:2004-04-13

    CPC classification number: C07D501/00

    Abstract: A process for the preparation of cephalosporin antibiotic of the formula (I) wherein R 1 represents hydrogen, trityl, etc,; R 3 is carboxylate ion or COOR d , where R d represents hydrogen, ester or a counter ion which forms a salt; R 4 represents H, OCH 3 , OCOCH 3 , =CH 2 , OCONH 2 , etc, which comprises: (i) condensing the activated derivative of the formula (III) where X represents halogen atom, with 7-amino cephalosporin derivative of the formula (XV) wherein R represents hydrogen, lower alkyl, etc, in the presence of a solvent at a temperature in the range of -50 °C to +50 °C to produce a compound of formula (XVI) ii) maintaining the pH in the range 5.0-10.0 using an inorganic base, iii) cyclizing the compound of formula (XVI) with thiourea to produce compound of formula (I).

    Abstract translation: 制备式(I)的头孢菌素抗生素的方法,其中R1代表氢,三苯甲基等; R3是羧酸根离子或COORd,其中Rd表示氢,酯或形成盐的抗衡离子; R 4表示H,OCH 3,OCOCH 3,= CH 2,OCONH 2等,其包括:(i)将其中X表示卤素原子的式(III)的活化衍生物与式(XV)的7-氨基头孢菌素衍生物缩合,其中 R表示氢,低级烷基等,在溶剂存在下,在-50℃至+ 50℃的温度范围内,生成式(ⅩⅥ)化合物,ii)将pH保持在5.0- 10.0,使用无机碱,iii)使式(XVI)化合物与硫脲环化以制备式(I)化合物。

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