Electrolytic reduction of dihydrobenzopyranoxanthenones
    24.
    发明授权
    Electrolytic reduction of dihydrobenzopyranoxanthenones 失效
    二氢苯并呋喃酮的电解还原

    公开(公告)号:US4082627A

    公开(公告)日:1978-04-04

    申请号:US800674

    申请日:1977-05-26

    IPC分类号: C07D493/04 C25B3/04

    CPC分类号: C07D493/04 C25B3/04

    摘要: Dihydrobenzopyranoxanthenones of the formula ##STR1## are electrolytically reduced to their corresponding hexahydrobenzopyranoxanthenones at a mercury cathode in the presence of a proton source and in the presence of an electrolyte selected from the group consisting of alkali metal salts, quaternary ammonium salts having a total of about 10 to about 28 carbon atoms in the cation moiety, and tertiary amine salts having a total of about 7 to about 21 carbon atoms in the cation moiety.

    Electrolytic process for 7-methoxy-3-exomethylenecepham compounds
    25.
    发明授权
    Electrolytic process for 7-methoxy-3-exomethylenecepham compounds 失效
    7-甲氧基-3-甲磺酰化合物的电解过程

    公开(公告)号:US4042472A

    公开(公告)日:1977-08-16

    申请号:US676183

    申请日:1976-04-12

    申请人: David A. Hall

    发明人: David A. Hall

    IPC分类号: C25B3/04 C25B3/00

    CPC分类号: C25B3/04

    摘要: 7-Acylamino-7-methoxycephalosporins substituted in the 3-position with an acetoxymethyl, halomethyl or 3-thio-substituted-methyl substituent are reduced electrolytically to provide the corresponding 3-exomethylenecepham compound. For example, 7-(2-thienylacetamido)-7-methoxy-3-acetoxymethyl-3-cephem-4-carboxylic acid is electrolytically reduced to provide 7-(2-thienylacetamido)-7-methoxy-3-exomethylenecepham-4-carboxylic acid and a lesser amount of the corresponding 3-methylcephalosporin compound.

    摘要翻译: 在3-位被乙酰氧基甲基,卤代甲基或3-硫代取代的甲基取代基取代的7-酰基氨基-7-甲氧基头孢菌素被电解还原,得到相应的3-甲磺酰头孢烯化合物。 例如,7-(2-噻吩基乙酰胺基)-7-甲氧基-3-乙酰氧基甲基-3-头孢烯-4-羧酸被电解还原,得到7-(2-噻吩基乙酰氨基)-7-甲氧基-3-甲磺酰头孢-4-酮 羧酸和较少量的相应的3-甲基头孢菌素化合物。