Process for the preparation of 17-phenyl-18,19,20-thinor-pgf 2a and its derivatives
    5.
    发明授权
    Process for the preparation of 17-phenyl-18,19,20-thinor-pgf 2a and its derivatives 有权
    制备17-苯基-18,19,20-薄-orf-2a及其衍生物的方法

    公开(公告)号:US07157590B2

    公开(公告)日:2007-01-02

    申请号:US10478849

    申请日:2002-05-03

    IPC分类号: C07C51/36

    CPC分类号: C07C405/00

    摘要: The present invention provides a new and effective process for the synthesis of 17-phenyl-18,19,20-trinor-PGF2α and its derivatives, including the anti-glaucoma drugs Bimatoprost and Latanoprost. The benefit of the present invention rises inter alia from the fact that a major intermediate involved in the synthesis of the above compounds may be isolated from a mixture containing also an undesired isomer, by crystallization. In addition, the undesired isomer may be oxidized to give the starting compound, which is then recycled.

    摘要翻译: 本发明提供了一种新的和有效的合成17-苯基-18,19,20-三磷酸-PGF2α及其衍生物的方法,包括抗青光眼药物比马前列素和拉坦前列素。 本发明的优点尤其在于通过结晶从参与合成上述化合物的主要中间体也可以从含有不想要的异构体的混合物中分离出来。 此外,不需要的异构体可被氧化,得到起始化合物,然后再循环。

    Process for the preparation of threo-methylphenidate hydrochloride
    7.
    发明授权
    Process for the preparation of threo-methylphenidate hydrochloride 失效
    制备苏哌甲酸盐酸盐的方法

    公开(公告)号:US07002016B2

    公开(公告)日:2006-02-21

    申请号:US10793600

    申请日:2004-03-04

    IPC分类号: C07D221/02

    CPC分类号: C07D211/34 A61K31/445

    摘要: The present invention provides a process for the preparation of threo-methylphenidate hydrochloride. According to a preferred embodiment, the process comprises the following steps: (a) contacting 1-(phenylglyoxylyl)piperidine arenesulfonylhydrazone of the formula wherein Ar denotes an aryl group, where the aryl group may be substituted by a C1–C6 alkyl, halo or nitro group; with an inorganic base in the presence of a water immiscible organic solvent and a phase transfer catalyst to obtain (R*,R*)-enriched 7-phenyl-1-azabicyclo [4.2.0]octan-8-one of the formula: (b) reacting the (R*,R*)-enriched 7-phenyl-1-azabicyclo[4.2.0]octan-8-one prepared in step (a) with a solution of hydrogen chloride in methanol to obtain threo-enriched methylphenidate hydrochloride; (c) crystallizing the threo-enriched methylphenidate hydrochloride prepared in step (b) to give the desired threo-methylphenidate hydrochloride. Preferably, the threo-methylphenidate hydrochloride produced by the process of the present invention contains no more than 1% of the erythro-isomer.

    摘要翻译: 本发明提供了制备苏哌甲酸盐酸盐的方法。 根据优选实施例,该方法包括以下步骤