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    • 2. 发明授权
    • Process for producing substituted alkylamines or salts thereof
    • 制备取代烷基胺或其盐的方法
    • US06197969B1
    • 2001-03-06
    • US09509783
    • 2000-04-03
    • Kazuto UmezuShuji TaniguchiMahito OgawaHidetaka Hiyoshi
    • Kazuto UmezuShuji TaniguchiMahito OgawaHidetaka Hiyoshi
    • C07D27764
    • C07D277/64
    • The present invention provides a process for producing a substituted alkylamine represented by formula (3): or a salt thereof, which process comprises reacting a 2-aminothiophenol derivative metal salt represented by formula (1): with an amino acid-N-carboxy anhydride represented by formula (2): and then subjecting the reaction product to cyclization under an acidic condition. A substituted alkylamine typified by 1-(2-benzothioazolyl)akylamine, or a salt thereof can be produced from a 2-aminothiophenol derivative industrially at a high handleability and a high yield, and even when the intended substituted alkylamine is an optically active compound, the intended product can be produced without reducing the optical purity of the optically active raw material.
    • 本发明提供一种制备由式(3)表示的取代烷基胺或其盐,该方法包括使由式(1)表示的2-氨基苯硫酚衍生金属盐与氨基酸-N-羧酸酐反应 由式(2)表示:然后使反应产物在酸性条件下环化。 以1-(2-苯并噻唑基)烷基胺或其盐为代表的取代烷基胺可以在工业上以高处理性和高产率由2-氨基苯硫酚衍生物制备,即使目标取代的烷基胺是光学活性化合物, 可以在不降低光学活性原料的光学纯度的情况下制造目标产品。
    • 3. 发明授权
    • 4-fluorosalicyclic acid derivative and process for production thereof
    • 4-氟水杨酸衍生物及其制备方法
    • US6166246A
    • 2000-12-26
    • US91249
    • 1998-06-12
    • Kazuto Umezu
    • Kazuto Umezu
    • C07C51/367C07C65/05C07C65/10
    • C07C65/05C07C51/367
    • The present invention provides a 4-fluorosalicylic acid derivative represented by the following general formula (1): ##STR1## (wherein X.sup.1, X.sup.2 and X.sup.3 are each independently a hydrogen atom or a halogen atom with a proviso that there is no case in which all of X.sup.1, X.sup.2 and X.sup.3 are hydrogen atoms or fluorine atoms simultaneously); and a process for producing the above 4-fluoro-salicylic acid derivative.The 4-fluorosalicylic acid derivative of the present invention is a novel compound not described in any literature and is very suitable as a raw material for production of a 3-fluorophenol derivative (the 3-fluorophenol derivative is very useful as an intermediate for liquid crystal, recording material, medicine and agricultural chemical) because the 4-fluorosalicylic acid derivative can be easily converted to the 3-fluorophenol derivative.
    • PCT No.PCT / JP97 / 03761 Sec。 371日期:1998年6月12日 102(e)1998年6月12日PCT PCT 1997年10月17日PCT公布。 公开号WO98 / 17620 PCT 日期:1998年4月30日本发明提供由以下通式(1)表示的4-氟水杨酸衍生物:其中X1,X2和X3各自独立地为氢原子或卤素原子,条件是不存在任何情况 其中X1,X2和X3全部同时为氢原子或氟原子); 以及制备上述4-氟 - 水杨酸衍生物的方法。 本发明的4-氟水杨酸衍生物是任何文献中未描述的新化合物,非常适合作为3-氟苯酚衍生物的制备原料(3-氟苯酚衍生物作为液晶的中间体非常有用 ,记录材料,医药和农业化学品),因为4-氟水杨酸衍生物可以容易地转化为3-氟苯酚衍生物。