Process for the removal of m-chlorotoluene from chlorotoluene mixtures
    12.
    发明授权
    Process for the removal of m-chlorotoluene from chlorotoluene mixtures 失效
    从氯甲苯混合物中除去间氯甲苯的方法

    公开(公告)号:US4827058A

    公开(公告)日:1989-05-02

    申请号:US166590

    申请日:1988-03-10

    CPC分类号: C07C17/395

    摘要: m-Chlorotoluene is removed from chlorotoluene mixtures with a content of up to 10% by weight of m-chlorotoluene, with reference to the total amount of chlorotoluene in the mixture, by chlorinating a substantially toluene-free chlorotoluene mixture in the presence of a Friedel-Crafts catalyst and if appropriate a co-catalyst at from 0.degree. C. up to the boiling point of the mixture, until the content of m-chlorotoluene has decreased to a value of

    摘要翻译: 通过在Friedel的存在下氯化基本上不含甲苯的氯甲苯混合物,从氯甲苯混合物中除去氯甲苯混合物的含量高达10重量%的间氯甲苯,参考混合物中氯甲苯的总量 在0℃至混合物的沸点的情况下,将催化剂和合适的助催化剂反应,直到氯甲苯的含量在氯甲苯混合物中降至1.0重量%以下。

    Process for the preparation of 2-chloro-4-methylphenol
    13.
    发明授权
    Process for the preparation of 2-chloro-4-methylphenol 失效
    2-氯-4-甲基苯酚的制备方法

    公开(公告)号:US5847236A

    公开(公告)日:1998-12-08

    申请号:US710990

    申请日:1996-09-25

    IPC分类号: B01J31/02 C07C37/62 C07C39/28

    摘要: 2-Chloro-4-methylphenol is prepared by reacting 4-methylphenol with a chlorinating agent in the presence of a catalyst system of one or more Lewis acids in a total amount of 0.1-10% by weight and one or more diaryl sulphides in a total amount of 0.1-10% by weight, all based on the amount of 4-methylphenol. The reaction temperature is 0.degree.-100.degree. C. The chlorinating agent is used in an amount of 0.5-1.5 mol per mole of 4-methylphenol. The reaction can be carried out until virtually complete consumption of the 4-methylphenol, high isomeric selectivity and high stage selectivity being observed.

    摘要翻译: 2-氯-4-甲基苯酚是通过使4-甲基苯酚与氯化剂在总量为0.1-10重量%的一种或多种路易斯酸的催化剂体系存在下反应来制备的,一种或多种二芳基硫化物在 总量为0.1-10重量%,均基于4-甲基苯酚的量。 反应温度为0℃-100℃。氯化剂的用量为每摩尔4-甲基苯酚0.5-1.5摩尔。 反应可以进行直到几乎完全消耗4-甲基苯酚,高异构选择性和高阶段选择性被观察到。

    Process for the preparation of benzothiazepinone derivatives
    14.
    发明授权
    Process for the preparation of benzothiazepinone derivatives 失效
    苯并噻吖啶酮衍生物的制备方法

    公开(公告)号:US4948886A

    公开(公告)日:1990-08-14

    申请号:US293265

    申请日:1989-01-04

    CPC分类号: C07C17/12 C07D281/10

    摘要: Benzothiazepinone derivatives can be prepared by alkaline hydrolysis of benzothiazoles to give o-amino-thiophenols, isolation thereof by acidification and further reaction with acrylic acids. In this connection, the acidification is carried out using a mineral acid, after which the o-amino-thiophenol is extracted using a water-insoluble solvent and is reacted in this extract with an acrylic acid.

    摘要翻译: 可以通过苯并噻唑碱性水解制备苯并噻吖啶酮衍生物,得到邻氨基苯硫酚,通过酸化进行分离,并进一步与丙烯酸反应。 就此而言,使用无机酸进行酸化,然后使用水不溶性溶剂萃取邻氨基苯硫酚,并在该萃取液中与丙烯酸反应。

    Process for preparing 2-cyanoindan-1-ones
    17.
    发明授权
    Process for preparing 2-cyanoindan-1-ones 失效
    2-氰基茚满-1-酮的制备方法

    公开(公告)号:US06355827B1

    公开(公告)日:2002-03-12

    申请号:US09485957

    申请日:2000-02-18

    IPC分类号: C07C25314

    摘要: In a particularly advantageous process for producing 2-cyanoindan-1-ones from 2-halogenated indan-1-ones by reaction with a cyanide salt, the cyanide salt is dissolved in a dipolar aprotic solvent or in a water-miscible ether and 2-halogenated indan-1-one is metered into this solution.

    摘要翻译: 在通过与氰化物盐反应从2-卤代茚满-1-酮生成2-氰基茚满-1-酮的特别有利的方法中,将氰化物盐溶于偶极非质子溶剂或水混溶性醚中, 将卤代茚满-1-酮计量加入该溶液中。