PROCESSES FOR THE PRODUCTION OF POLYMORPHIC FORMS OF RIFAXIMIN
    61.
    发明申请
    PROCESSES FOR THE PRODUCTION OF POLYMORPHIC FORMS OF RIFAXIMIN 有权
    生产RIFAXIMIN多形态的方法

    公开(公告)号:US20080262232A1

    公开(公告)日:2008-10-23

    申请号:US12119612

    申请日:2008-05-13

    IPC分类号: C07D491/22

    CPC分类号: C07D498/22

    摘要: Crystalline polymorphous forms of rifaximin (INN) antibiotic named rifaximin α and rifaximin β, and a poorly crystalline form named rifaximin γ, useful in the production of medicinal preparations containing rifaximin for oral and topical use and obtained by means of a crystallization carried out by hot-dissolving the raw rifaximin in ethyl alcohol and by causing the crystallization of the product by addition of water at a determinate temperature and for a determinate period of time, followed by a drying carried out under controlled conditions until reaching a settled water content in the end product, are the object of the invention.

    摘要翻译: 结晶多形态的利福昔明(INN)抗生素名为利福昔明α和利福昔明β,以及名为利福昔明γ的结晶不良形式,可用于生产含有利福昔明用于口服和局部使用的药物制剂,并通过热结晶进行 将原来的利福昔明溶解在乙醇中,并通过在确定的温度下加入水并在一定的时间内引起产物结晶,然后在受控条件下进行干燥,直到达到最终的沉降含水量 产品是本发明的目的。

    Optical resolution of racemic mixtures of alpha-naphthylpropionic acids
and derivatives of said acids
    65.
    发明授权
    Optical resolution of racemic mixtures of alpha-naphthylpropionic acids and derivatives of said acids 失效
    α-萘基丙酸和所述酸的衍生物的外消旋混合物的光学拆分

    公开(公告)号:US4724102A

    公开(公告)日:1988-02-09

    申请号:US844834

    申请日:1986-03-27

    CPC分类号: C07C51/06 C07C51/487

    摘要: A new process for the optical resolution of racemic mixtures of .alpha.-naphthylpropionic acids of formula ##STR1## wherein R.sub.1 is (C.sub.1-6) alkyl and R.sub.2 represents hydrogen or a halogen atom comprises reacting a racemic mixture of a compound of formula II ##STR2## wherein R.sub.1 and R.sub.2 have the above seen meanings and R.sub.3 is a reactive group, with an optically active aminoacid of formula ##STR3## wherein R.sub.4 represents a (C.sub.1-8) alkyl, phenyl, substituted phenyl, benzyl, substituted benzyl or carboxy, and m is an integer from 0 to 4, to give a pair of diastereoisomeric amides of formula ##STR4## wherein R.sub.1, R.sub.2, R.sub.4 and m have the above seen meanings, and M is a hydrogen atom or a cation of an alkali metal or a cation of an organic base. Compounds IV are resolved into the single diastereoisomeric amides d,d or 1,d, or d,1 or 1,1. Acid hydrolysis gives the optically active compound I.

    摘要翻译: 用于光学拆分式(Ia)的α-萘基丙酸的外消旋混合物的新方法,其中R 1为(C 1-6)烷基且R 2表示氢或卤素原子包括使式II化合物的外消旋混合物 其中R 1和R 2具有上述的意义且R 3是反应性基团,其中式III的光学活性氨基酸其中R 4表示(C 1-8)烷基,苯基,取代的苯基,苄基,取代的苄基 或羧基,m为0至4的整数,得到一对式IV的非对映异构体酰胺,其中R 1,R 2,R 4和m具有上述含义,M为氢原子或 碱金属或有机碱的阳离子。 化合物IV被分解成单一非对映异构体酰胺d,d或1,d或d,1或1,1。 酸水解产生光学活性化合物I.

    Process for the synthesis of pyrido-imidazo rifamycins
    66.
    发明授权
    Process for the synthesis of pyrido-imidazo rifamycins 失效
    合成吡啶并咪唑并吡唑霉素的方法

    公开(公告)号:US4557866A

    公开(公告)日:1985-12-10

    申请号:US727521

    申请日:1985-04-26

    CPC分类号: C07D498/22

    摘要: A new process for the synthesis of pyrido-imidazo-rifamycins of formula ##STR1## wherein R is hydrogen or acetyl, R.sub.1 and R.sub.2 independently represent hydrogen, (C.sub.1-4)-alkyl, benzyloxy, mono- or di-(C.sub.1-3)-alkylamino-(C.sub.1-4)-alkyl, (C.sub.1-3)-alkoxy-(C.sub.1-4)-alkyl, hydroxymethyl, hydroxy-(C.sub.2-4)-alkyl, cyano, halogen, nitro, mercapto, (C.sub.1-4)-alkylthio, phenylthio, carbamoyl, mono- or di-(C.sub.1-4)-alkyl-carbamoyl, or R.sub.1 and R.sub.2 taken together with two consecutive carbon atoms of the pyridine nucleus form a benzene ring optionally substituted by one or two methyl or ethyl groups.The process comprises reacting the rifamycin O of formula ##STR2## with a 2-aminopyridine of formula ##STR3## wherein R.sub.1 and R.sub.2 have the same meanings as before.

    摘要翻译: 用于合成式(I)的吡啶并咪唑并咪唑啉的新方法,其中R为氢或乙酰基,R 1和R 2独立地表示氢,(C 1-4) - 烷基,苄氧基,单 - 或二 - (C1- 3) - 烷基氨基 - (C 1-4) - 烷基,(C 1-3) - 烷氧基 - (C 1-4) - 烷基,羟甲基,羟基 - (C 2-4) - 烷基,氰基,卤素,硝基,巯基,( C1-4) - 烷硫基,苯硫基,氨基甲酰基,单 - 或二 - (C1-4) - 烷基 - 氨基甲酰基,或R1和R2与吡啶核的两个连续碳原子一起形成任选被一个或多个 两个甲基或乙基。 该方法包括使式II的利福霉素O与式III的2-氨基吡啶反应,其中R1和R2具有与之前相同的含义。

    Process for the optical resolution of mixtures of D- and
L-2-(6-methoxy-2-naphthyl)-propionic acids
    67.
    发明授权
    Process for the optical resolution of mixtures of D- and L-2-(6-methoxy-2-naphthyl)-propionic acids 失效
    D-和L- -2-(6-甲氧基-2-萘基) - 丙酸的混合物的光学拆分方法

    公开(公告)号:US4399284A

    公开(公告)日:1983-08-16

    申请号:US282440

    申请日:1981-07-13

    CPC分类号: C07D453/04 C07C51/487

    摘要: A new process for the optical resolution of mixtures of d- and 1-2-(6-methoxy-2-naphthyl)-propionic acids, which comprises preparing a solution of a mixture of d-and 1-2-(6-methoxy-2-naphthyl)-propionic acids and an optically active organic base in a predetermined organic solvent, slowly cooling the obtained solution and seeding with crystals of a salt of d-2-(6-methoxy-2-naphthyl)-propionic acid with the optically active organic base containing a certain amount by weight of the organic solvent, and treating the obtained product with mineral acids in suitable organic solvents to obtain the free d-2-(6-methoxy-2-naphthyl)-propionic acid.

    摘要翻译: 用于光学拆分d-和1-2-(6-甲氧基-2-萘基) - 丙酸的混合物的新方法,其包括制备d-和1-2-(6-甲氧基 -2-萘基) - 丙酸和光学活性有机碱在预定的有机溶剂中,缓慢冷却所得溶液并用d-2-(6-甲氧基-2-萘基) - 丙酸盐的晶体接种, 含有一定量的有机溶剂的光学活性有机碱,并用无机酸在合适的有机溶剂中处理得到的产物,得到游离的d-2-(6-甲氧基-2-萘基) - 丙酸。