Process for 3-halo-1-carba(dethia)-3-cephem antibiotics
    23.
    发明授权
    Process for 3-halo-1-carba(dethia)-3-cephem antibiotics 失效
    3-卤代-1-咔唑(dethia)-3-头孢烯抗生素的方法

    公开(公告)号:US4778884A

    公开(公告)日:1988-10-18

    申请号:US18668

    申请日:1987-02-25

    IPC分类号: C07D463/00 C07D471/04

    CPC分类号: C07D463/06

    摘要: 7.beta.-Acylamino-3-trifluoromethylsulfonyloxy-1-carba-3-cephem-4-carboxylic acid antibiotic compounds, esters and salts thereof, and the corresponding 7-amino and protected 7-amino 1-carbacephalosporins are provided. The 3-trifluoromethylsulfonyloxy-substituted 1-carbacephalosporins also are useful in a process for preparing 3-halo-1-carbacephalosporins which comprises reacting a 3-triflate ester with a lithium halide in an aprotic polar solvent.

    摘要翻译: 提供了7β-乙酰氨基-3-三氟甲基磺酰氧基-1-咔唑-3-头孢烯-4-羧酸抗生素化合物,其酯和盐,以及相应的7-氨基和被保护的7-氨基-1-碳头孢菌素。 3-三氟甲基磺酰氧基取代的α-碳霉素也可用于制备3-卤代-1-碳霉素的方法,其包括在非质子极性溶剂中使3-三氟甲磺酸酯与卤化锂反应。

    Intermediates for beta-lactam antibiotics
    26.
    发明授权
    Intermediates for beta-lactam antibiotics 失效
    β-内酰胺抗生素中间体

    公开(公告)号:US4870169A

    公开(公告)日:1989-09-26

    申请号:US184857

    申请日:1988-04-22

    摘要: 1-Benzyl(or substituted benzyl)-3.beta.-[4(S)-aryloxazolidin-2-one-3-yl]-4.beta.-(2-arylvinyl)azetidin-2-ones are provided via cycloaddition of a 4(S)-aryloxazolidin-2-one-3-ylacetyl halide and an imine formed with a benzylamine and a 3-arylacrolein, e.g. cinnamaldehyde. The azetidinones are useful chiral intermediates in an asymmetric synthesis of 1-carba(1-dethia)-3-hydroxy-3-cephem-4-carboxylic acids and esters and to monocyclic .beta.-lactam antibiotics.

    摘要翻译: 1-苄基(或取代的苄基)-3β-[4(S) - 芳基恶唑烷-2-酮-3-基]-4β-(2-芳基乙烯基)氮杂环丁烷-2-酮通过环(4) S) - 芳基恶唑烷-2-酮-3-基乙酰卤和由苄胺和3-芳基丙烯醛形成的亚胺,例如 肉桂醛。 氮杂环丁酮是1-咔唑(1-脱氢)-3-羟基-3-头孢烯-4-羧酸和酯与单环β-内酰胺抗生素不对称合成中有用的手性中间体。