Beta-lactams and their production
    1.
    发明授权
    Beta-lactams and their production 失效
    β-内酰胺及其生产

    公开(公告)号:US5424422A

    公开(公告)日:1995-06-13

    申请号:US197712

    申请日:1994-02-17

    摘要: A beta-lactam compound of the formula: ##STR1## wherein R.sub.1 and R.sub.2 are, the same or different, each a hydrogen atom or a lower alkyl group, R.sub.3.sup.o is a lower alkyl group having a beta-configuration, R.sub.4 is a carboxyl-protecting group, X is a hydrogen atom or a protected hydroxyl group and COZ is a protected thiolcarboxyl group, which is useful as a valuable intermediate in the stereospecific production of 1-alkylcarbapenem compounds.

    摘要翻译: 下式的β-内酰胺化合物:其中R 1和R 2各自为氢原子或低级烷基,R 30为具有β-构型的低级烷基,R 4为 羧基保护基,X是氢原子或保护的羟基,COZ是被保护的硫醇羧基,其可用作1-烷基碳青霉烯化合物的立体特异性生产中的有价值的中间体。

    Beta-lactams and their production
    2.
    发明授权
    Beta-lactams and their production 失效
    β-内酰胺及其生产

    公开(公告)号:US5310897A

    公开(公告)日:1994-05-10

    申请号:US974302

    申请日:1992-11-10

    摘要: A beta-lactam compound of the formula: ##STR1## wherein R.sub.1 and R.sub.2 are, the same or different, each a hydrogen atom or a lower alkyl group, R.sub.3.sup.0 is a hydroen atom or a lower alkyl group having a beta-configuration, R.sub.4 is a carboxyl-protecting group, X is a hydrogen atom or a protected hydroxyl group and COZ is a protected thiolcarboxyl group, which is useful as a valuable intermediate in the stereospecific production of 1-alkylcarbapenem compounds.

    摘要翻译: 下式的β-内酰胺化合物:其中R 1和R 2各自为氢原子或低级烷基,R 30为氢原子或具有β-位的低级烷基, 构型,R4是羧基保护基,X是氢原子或被保护的羟基,COZ是被保护的硫醇羧基,其可用作1-烷基碳青霉烯化合物的立体特异性生产中的有价值的中间体。

    4-Carboxy azetidinone compounds and production thereof from diketene and
a Schiff base
    3.
    发明授权
    4-Carboxy azetidinone compounds and production thereof from diketene and a Schiff base 失效
    4-羧基氮杂环丁酮化合物及其由双烯酮和席夫碱生产

    公开(公告)号:US4556514A

    公开(公告)日:1985-12-03

    申请号:US541648

    申请日:1983-10-13

    IPC分类号: C07D205/08

    CPC分类号: C07D205/08 Y02P20/55

    摘要: .beta.-Lactam compounds which are useful as intermediates for the production of carbapenem or penem derivatives and a process for producing the same. The process comprises reacting a Schiff base with diketene in the presence of an imidazole, reducing the acetyl group of the resulting N-protected-3-acetyl-2-azetidinone-4-carboxylic acid ester, and removing the protecting group for a carboxyl group from the resulting 3-(1-hydroxyethyl)-2-azetidinone-4-carboxylic acid derivative.

    摘要翻译: 可用作生产碳青霉烯类或半胱氨酸衍生物的中间体的β-内酰胺化合物及其制备方法。 该方法包括在咪唑存在下使席夫碱与双烯酮反应,还原所得N-保护-3-乙酰基-2-氮杂环丁酮-4-羧酸酯的乙酰基,并除去羧基的保护基 由所得的3-(1-羟基乙基)-2-氮杂环丁酮-4-羧酸衍生物制得。