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109 条记录 (耗时 0.024 秒)

    Process for producing hydroxyphenyl aliphatic acid derivatives
    11.
    发明授权
    Process for producing hydroxyphenyl aliphatic acid derivatives 失效
    羟基苯基脂肪酸衍生物的制备方法

    公开(公告)号：US4390723A

    公开(公告)日：1983-06-28

    申请号：US290305

    申请日：1981-08-05

    申请人： Masahiro Matsuno ,  Yasushi Higuchi ,  Yutaka Ohishi ,  Yoshiki Nakayama ,  Chihiro Yazawa

    发明人： Masahiro Matsuno ,  Yasushi Higuchi ,  Yutaka Ohishi ,  Yoshiki Nakayama ,  Chihiro Yazawa

    IPC分类号： B01J31/18 ,  C07C51/367 ,  C07C59/64 ,  C07C65/01

    CPC分类号： C07C59/64 ,  B01J31/1825 ,  C07C51/367 ,  B01J2531/16

    摘要： A catalyst of bis(8-quinolinolate) copper (II) complex having the formula ##STR1## which is used for producing a hydroxyphenyl aliphatic acid derivative having the formula ##STR2## wherein R.sub.1 represents hydrogen atom, a lower alkyl group, a lower alkoxy group, hydroxy group or a lower alkylcarbonyl group; R.sub.2 and R.sub.3 are the same or different and respectively represent hydrogen atom or a lower alkyl group; and m is 1 or 2; l is 0, 1 or 2; n is 0, 1 or 2; by reacting a halophenyl aliphatic acid derivative having the formula ##STR3## wherein R.sub.1, R.sub.2, R.sub.3, m, l and n are defined above and R.sub.4 represents hydrogen atom or a monovalent hydrocarbon moiety; and X represents a halogen atom, with a base.

    摘要翻译： 用于制备具有式（I）的羟基苯基脂族酸衍生物的式（8-羟基喹啉）铜（II）络合物的催化剂，其具有式（IMA），其中R 1表示氢原子，低级烷基， 低级烷氧基，羟基或低级烷基羰基; R2和R3相同或不同，分别表示氢原子或低级烷基; m为1或2; l为0,1或2; n为0,1或2; 其中R 1，R 2，R 3，m，l和n如上所定义，R 4代表氢原子或一价烃部分，得到式（II）的卤代苯基脂族酸衍生物： 并且X表示卤素原子和碱。

    Process for preparing 4-hydroxyphenylacetic acid
    12.
    发明授权
    Process for preparing 4-hydroxyphenylacetic acid 失效
    制备4-羟基苯基乙酸的方法

    公开(公告)号：US4337355A

    公开(公告)日：1982-06-29

    申请号：US161592

    申请日：1980-06-20

    申请人： Kazuhisa Nakajima ,  Kazuaki Gohgi ,  Toshio Yamamoto

    发明人： Kazuhisa Nakajima ,  Kazuaki Gohgi ,  Toshio Yamamoto

    IPC分类号： C07C51/377 ,  C07C65/01

    CPC分类号： C07C51/377

    摘要： A process for preparing 4-hydroxyphenylacetic acid by reducing 4-hydroxymandelic acid in a reaction medium of a lower aliphatic carboxylic acid or a water-containing lower aliphatic carboxylic acid. When the crystalline 4-hydroxymandelic acid is employed as the staring material, 4-hydroxyphenylacetic acid of high quality is obtained in high yields.

    摘要翻译： 通过在低级脂族羧酸或含水低级脂肪族羧酸的反应介质中还原4-羟基扁桃酸制备4-羟基苯基乙酸的方法。 当结晶的4-羟基扁桃酸用作起始材料时，以高产率获得高质量的4-羟基苯基乙酸。

    Method for synthesizing 4-(hydroxymethyl)benzoic acid by using P-xylene (PX) as raw material
    16.
    发明授权
    Method for synthesizing 4-(hydroxymethyl)benzoic acid by using P-xylene (PX) as raw material 审中-公开

    公开(公告)号：US10669223B2

    公开(公告)日：2020-06-02

    申请号：US16609203

    申请日：2018-05-05

    申请人： YUNNAN UNIVERSITY

    发明人： Jiaqiang Wang ,  Ying Li ,  Daomei Chen

    IPC分类号： C07C51/285 ,  B01J31/16 ,  C07C65/01

    摘要： A method for synthesizing 4-(Hydroxymethyl)benzoic acid using P-xylene (PX) as a raw material, including: dissolving PX in an organic solvent to undergo an oxidation reaction with an oxidizing agent under an action of an M-MOF catalyst; and after the oxidation reaction, performing a post-treatment to obtain the 4-(Hydroxymethyl)benzoic acid; wherein, the metal element M in the M-MOF catalyst is Fe, Cu, Cr, Mn, Cu/Fe, Cu/Cr, Cu/Mn, Fe/Mn, Cr/Fe or Cr/Mn. The by-product produced in the reaction process is little, the yield is high, and the separation is convenient. The acid-base neutralization is not required in the reaction process, reducing pollution. A one-step reaction is employed which has mild reaction conditions, short reaction time, low pollution and is convenient for industrialized mass production; and the obtained 4-(Hydroxymethyl)benzoic acid can be used for preparing medicines and liquid crystal materials having wide applications.