Process for the preparation of an oxytetracycline-calcium silicate
complex salt from fermentation broth
    1.
    发明授权
    Process for the preparation of an oxytetracycline-calcium silicate complex salt from fermentation broth 失效
    从发酵液制备土霉素 - 硅酸钙复合盐的方法

    公开(公告)号:US4584135A

    公开(公告)日:1986-04-22

    申请号:US537293

    申请日:1983-09-29

    IPC分类号: C12P29/00 C07C103/26

    CPC分类号: C12P29/00

    摘要: The invention relates to a process for the preparation of an oxytetracycline-calcium silicate complex salt from fermentation broth.By the process according to the invention the valuable antibiotic oxytetracycline may be separated from the fermentation broth in an easy manner. The complex obtained according to (a) contains up to 50% of antibiotic and is suitable for the processing in the pharmaceutical industry while the product according to (b) contains 10 to 20% of antibiotic and may be used as fodder additive directly.

    摘要翻译: 本发明涉及从发酵液制备土霉素 - 硅酸钙复合盐的方法。 通过根据本发明的方法,可以容易地将有价值的抗生素土霉素与发酵液分离。 根据(a)获得的复合物含有高达50%的抗生素,适用于制药工业的加工,而根据(b)的产品含有10-20%的抗生素,可直接用作饲料添加剂。

    Process for the preparation of easy-flowing (flowable) oxytetracyclin
hydrochloride
    2.
    发明授权
    Process for the preparation of easy-flowing (flowable) oxytetracyclin hydrochloride 失效
    制备易流动(可流动)盐酸土霉素的方法

    公开(公告)号:US4579686A

    公开(公告)日:1986-04-01

    申请号:US606348

    申请日:1984-05-02

    CPC分类号: C07C233/00

    摘要: The invention relates to a new process for the preparation of easy-flowing (flowable) oxytetracyclin hydrochloride. According to the process of the invention, the crude, dry or filter-wet oxytetracyclin hydrochloride consisting of needle-shaped crystals is boiled with an organic solvent forming an azeotropic mixture with water, optionally a part of the solvent is distilled off in a form of an azeotropic mixture, then the mixture is cooled and the precipitated oxytetracyclin hydrochloride consisting of spherical crystals is separated and dried.Oxytetracyclin hydrochloride exists in two various crystal forms, the one of which is needle-shaped, while the other one consists of orthorhombic sheets. The crystals of this latter form are capable of forming spherical particles by coalescence. The crystal form consisting of spherical particles is much more useful for the pharmaceutical industry.By means of the new process easy-flowing (flowable) oxytetracyclin hydrochloride can be prepared in a favorable yield and with a high purity from the crude hydrochloride product consisting of needle-shaped crystals.

    摘要翻译: 本发明涉及一种制备易流动(可流动的)盐酸四环素的新方法。 根据本发明的方法,将由针状结晶组成的粗制,干燥或过滤湿润的土霉素盐酸盐与有机溶剂一起沸腾,与水形成共沸混合物,任选地,一部分溶剂以 共沸混合物,然后将混合物冷却,分离并干燥沉淀的由球形晶体组成的盐酸四环素盐酸盐。 盐酸四环素以两种不同的晶体形式存在,其中一种是针状,另一种由斜方片组成。 后一种形式的晶体能够通过聚结形成球形颗粒。 由球形颗粒组成的晶体形式对于制药工业来说更为有用。 通过新方法,易于流动(可流动)的盐酸土霉素可以从由针状晶体组成的粗盐酸盐产物以有利的产率和高纯度制备。

    Flavilium compounds and method of using
    7.
    发明授权
    Flavilium compounds and method of using 失效
    黄矾化合物及其使用方法

    公开(公告)号:US5753695A

    公开(公告)日:1998-05-19

    申请号:US252941

    申请日:1994-05-19

    CPC分类号: C07D311/60 Y10S514/885

    摘要: The invention relates to a compound of formula (I) ##STR1## wherein X is a pharmacologically acceptable anion, R.sub.1 and R.sub.2 are independently of each other hydrogen, or an --OY group in which Y is hydrogen, an .alpha.-aminoacyl, or a C.sub.1-5 aminoalkyl residue, R.sub.3, R.sub.4 and R.sub.7 are independently of each other hydrogen, or a C.sub.1-5 alkyl residue R.sub.5 is hydrogen, and .alpha.-aminoacyl, or a C.sub.1-5 alkyl residue, and R.sub.6 is hydrogen, OH.sup.-, or a C.sub.1-5 alkyl residue, and pharmaceutically acceptable salts and esters thereof; and to condensation processes for preparing them.

    摘要翻译: 本发明涉及式(I)化合物其中X为药理学上可接受的阴离子,R1和R2彼此独立地为氢,或Y为氢的-OY基团,α-氨基酰基 或C1-5氨基烷基残基,R3,R4和R7彼此独立地为氢,或C1-5烷基残基R5为氢,α-氨基酰基或C1-5烷基残基,R6为氢, OH-或C 1-5烷基残基,及其药学上可接受的盐和酯; 以及制备它们的冷凝过程。