Process for the direct and regioselective functionalization in position
2 of phenothiazine
    2.
    发明授权
    Process for the direct and regioselective functionalization in position 2 of phenothiazine 失效
    吩噻嗪2位直接和区域选择性官能化方法

    公开(公告)号:US5362871A

    公开(公告)日:1994-11-08

    申请号:US833800

    申请日:1992-02-12

    CPC分类号: C07D279/30 C07D279/20

    摘要: A process for the direct and regioselective functionalization of phenothiazine which allows one to introduce an SH group in position 2, said process comprising the sulfination or sulfonation of the phenothiazine N-protected with an alkoxycarbonyl, an alkylsulfonyl or an arylsulfonyl group, the reduction of the produce obtained to give the N-protected 2-mercapto-phenothiazine, and the deprotection of the nitrogen atom. The thus-obtained 2-mercapto-phenothiazine is an important intermediate for the preparation of pharmacological active compounds.

    摘要翻译: 用于直接和区域选择性官能化吩噻嗪的方法,其允许在位置2引入SH基团,所述方法包括被烷氧基羰基,烷基磺酰基或芳基磺酰基N-保护的吩噻嗪的硫酸化或磺化, 得到N-保护的2-巯基吩噻嗪得到的产物和氮原子的去保护。 由此获得的2-巯基吩噻嗪是制备药理活性化合物的重要中间体。

    Process for preparing an intermediate
    8.
    发明授权
    Process for preparing an intermediate 失效
    制备中间体的方法

    公开(公告)号:US5023365A

    公开(公告)日:1991-06-11

    申请号:US453791

    申请日:1989-12-20

    IPC分类号: C07C67/52

    CPC分类号: C07C67/52

    摘要: A process is described for preparing an intermediate in the synthesis of naproxen.The intermediate, namely the methyl ester of S(+)-2-(5-bromo-6-methoxy-2-naphthyl)-propionic acid or of its 5-chloro analogue, is prepared by preferential crystallization from mixtures with its enantiomer.

    摘要翻译: 描述了在萘普生合成中制备中间体的方法。 中间体即S(+) - 2-(5-溴-6-甲氧基-2-萘基) - 丙酸或其5-氯类似物的甲基酯通过与​​其对映异构体的混合物进行优先结晶来制备。