Process for the preparation of
7-amino-3-((Z)-1-propen-1yl)-3-cephem-4-carboxylic acid
    27.
    发明授权
    Process for the preparation of 7-amino-3-((Z)-1-propen-1yl)-3-cephem-4-carboxylic acid 失效
    制备7-氨基-3-((Z)-1-丙烯-1-基)-3-辛基-4-羧酸的方法

    公开(公告)号:US5132419A

    公开(公告)日:1992-07-21

    申请号:US589304

    申请日:1990-09-27

    CPC classification number: C07D205/095 C07D501/00

    Abstract: (7-APCA) having the formula (I) ##STR1## which is an important synthesis intermediate in the preparation of cephalosporin-like antibiotics, is prepared by treating a compound of the formula (II) ##STR2## in which R.sub.1 and R.sub.2 represent alkyl, aryl and aralkyl radicals, with a strong protonic acid or with a Lewis acid. Compound (II) is prepared by adding triphenylphosphine and alkali metal iodide to a compound of the formula (VI) ##STR3## then reacting with acetaldehyde in base. Compound (VI) is prepared by treating a compound of the formula (VII) ##STR4## with a base in a polar solvent at -70.degree. C. to 0.degree. C. Compound (VII) is prepared by treating a compound of the formula (VIII) ##STR5## with a chlorinating agent in an organic solvent.

    Abstract translation: 通过将式(II)化合物(II)化合物制备,其具有式(I)的化合物(I)作为制备头孢菌素样抗生素的重要的合成中间体, 其中R 1和R 2表示烷基,芳基和芳烷基,具有强质子酸或路易斯酸。 通过将三苯基膦和碱金属碘化物加入到式(VI)化合物(VI)中,然后与乙醛在碱中反应来制备化合物(II)。 通过在极性溶剂中在-70℃至0℃下用碱处理式(VII)的化合物(VII)制备化合物(VI)。化合物(VII)通过将化合物 (VIII)的化合物(VIII)与有机溶剂中的氯化剂反应。

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