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    • 6. 发明授权
    • Process for preparing cephalosporin derivatives
    • 制备头孢菌素衍生物的方法
    • US4564676A
    • 1986-01-14
    • US477836
    • 1983-03-23
    • Junichi NakazawaTeruo HashimotoMasanao KanekoTakeo Miyaoka
    • Junichi NakazawaTeruo HashimotoMasanao KanekoTakeo Miyaoka
    • A61K20060101A61K31/545C07D501/04C07D501/18C07D501/36C07D501/38C07D501/48
    • C07D501/04
    • A 7-acylamino (or 7-amino)-3-(substituted thiomethyl)cephalosporin derivative or a carboxyl derivative thereof is prepared by heating the corresponding 7-acylamino (or 7-amino)-3-carbamoyloxymethylcephalosporanic acid or a carboxyl derivative thereof with a thiol corresponding to the group which it is desired to introduce at the 3-position under conditions in which the water present is minimized, specifically, either no water is present or the amount of water is limited to less than 5 times the weight of the 7-acylamino (or 7-amino)-3-carbamoyloxymethylcephalosporanic acid or carboxyl derivative thereof. The compounds thus prepared are useful as pharmaceuticals or as intermediates in the production of pharmaceuticals. One of the compounds thus prepared, namely 7.alpha.-methoxy-3-(1-methyl-1H-tetrazol-5-yl)thiomethyl-7.beta.-(O-5-p-nitrobenzoylamino-5-carboxyvaleramido-3-cephem-4-carboxylic acid, is a new compound and it and its salts and esters also form part of the present invention.
    • 通过将相应的7-酰基氨基(或7-氨基)-3-氨基甲酰氧基甲基头孢烷酸或其羧基衍生物加热而制备7-酰基氨基(或7-氨基)-3-(取代的硫代甲基)头孢菌素衍生物或其羧基衍生物 对应于在存在水存在的条件下期望在3-位引入的基团的硫醇,具体地说,不存在水或水的量被限制在小于5重量% 7-酰基氨基(或7-氨基)-3-氨基甲酰氧基甲基头孢烷酸或其羧基衍生物。 由此制备的化合物可用作药物或作为药物生产中的中间体。 如此制备的一种化合物,即7α-甲氧基-3-(1-甲基-1H-四唑-5-基)硫甲基-7β-(O-5-对硝基苯甲酰氨基-5-羧基戊酰氨基-3-头孢烯-4-基) 4-羧酸,是一种新的化合物,它及其盐和酯也构成本发明的一部分。