1-nitro-2-naphthol derivative and method for producing 1-amino-2-naphthol derivative
    114.
    发明专利
    1-nitro-2-naphthol derivative and method for producing 1-amino-2-naphthol derivative 审中-公开
    1-硝基-2-萘衍生物及其制备1-氨基-2-萘基衍生物的方法

    公开(公告)号:JP2007302602A

    公开(公告)日:2007-11-22

    申请号:JP2006132434

    申请日:2006-05-11

    Abstract: PROBLEM TO BE SOLVED: To provide a method for producing a 1-nitro-2-naphthol derivative by which the 1-position of 2-hydroxynaphthalene-3,6-dicarboxylic acid or a derivative thereof is effectively and selectively nitrated.
    SOLUTION: The method for producing the 1-nitro-2-naphthol derivative represented by general formula [II] (wherein, Y
    1 and Y
    2 represent each an ester group or the like; and X represent a halogen) comprises the following. A 2-naphthol derivative represented by general formula [I] is reacted with a nitrating agent using an aliphatic carboxylic acid as a solvent.
    COPYRIGHT: (C)2008,JPO&INPIT

    Abstract translation: 待解决的问题:提供一种2-硝基-2-萘酚衍生物的制备方法,其中2-羟基萘-3,6-二羧酸或其衍生物的1位被有效且选择性地硝化。 解决方案:由通式[II](其中Y 1 和Y 2 表示的1-硝基-2-萘酚衍生物的制备方法各自表示 酯基等; X表示卤素)包括以下。 使用通式[I]表示的2-萘酚衍生物与使用脂族羧酸作为溶剂的硝化剂反应。 版权所有(C)2008,JPO&INPIT

    METHOD FOR PRODUCING SUBSTITUTED HALOGENATED BENZENE COMPOUNDS

    公开(公告)号:JP2002234864A

    公开(公告)日:2002-08-23

    申请号:JP2001362369

    申请日:2001-11-28

    Abstract: PROBLEM TO BE SOLVED: To provide a method for reasonably producing a substituted halogenated benzene compound, especially a 2,6-dialkyl(or aryl)-4-substituted halogenated benzene compound, useful as an intermediate for medicines or agrochemicals. SOLUTION: This method for producing the substituted halogenated benzene compound comprises reacting a substituted (thio)phenol compound or (thio) phenolate compound represented by general formula (I) with a halogenating agent represented by general formula (II).

    PRODUCTION OF 2,4-DICHLORO-3-ETHYL-6-NITROPHENOL

    公开(公告)号:JPH04164049A

    公开(公告)日:1992-06-09

    申请号:JP29325390

    申请日:1990-10-29

    Abstract: PURPOSE:To safely produce the subject compound from an aqueous solution of 3,5-dichloro-4-ethyl-2-hydroxybenzenesulfonic acid and an aqueous solution of nitric acid in high purity and yield by reusing a filtrate or water layer obtained by separating the objective compound after nitration reaction. CONSTITUTION:The subject compound useful as an intermediate for a cyan coupler for color photography, etc., is produced by sulfonating preferably 4- chloro-3-ethylphenol, chlorinating the resultant 5-chloro-4-ethyl-2-hydroxybenzenesulfonic acid and nitrating an aqueous solution of the obtained 3,5- dichloro-4-ethyl-2-benzenesulfonic acid with an aqueous solution of nitric acid having an acid concentration of preferably 2-70wt.%. In the above process, the filtrate or water layer obtained by filtering or separating the objective compound produced by the nitration reaction is reused as a part or total of the nitration reaction medium. The induction period can be shortened, the safety and yield can be remarkably improved and the objective compound can be produced on an industrial scale at a low cost by this process.

Patent Agency Ranking