Preparation of betamethyl carbapenem intermediates
    6.
    发明授权
    Preparation of betamethyl carbapenem intermediates 失效
    二甲基碳青霉烯中间体的制备

    公开(公告)号:US06242596B1

    公开(公告)日:2001-06-05

    申请号:US08241958

    申请日:1994-05-12

    IPC分类号: C07D20508

    摘要: A process for making a beta methyl carbapenem intermediate is disclosed. A compound of formula I: is contacted in a non-reactive solvent with methyl Meldrum's acid and a base to produce a compound of formula III: Compound III is treated in an aprotic solvent with a scavenging base, an alkali metal halide and a tri-organo silyl protecting compound for nitrogen to produce a compound of formula IV: Compound IV may be reacted with a nucleophile Nu—X in a non-reactive solvent and base, and the mixture acidified to produce a compound of formula V. Compound V may be reacted with mild acid to produce a compound of formula VI.

    摘要翻译: 公开了一种制备β-甲基碳青霉烯中间体的方法。 将式I化合物在非反应性溶剂中与甲基Meldrum酸和碱接触以产生式III化合物:化合物III在非质子溶剂中用清除碱,碱金属卤化物和三 - 用于氮的有机甲硅烷基保护化合物以产生式IV的化合物:化合物IV可以在非反应性溶剂和碱中与亲核试剂Nu-X反应,并将该混合物酸化以产生式V化合物。化合物V可以是 与轻度酸反应生成式Ⅵ化合物。