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    Production method of dibasic acid
    1.
    发明专利
    Production method of dibasic acid 有权
    二氧化碳的生产方法

    公开(公告)号：JP2007119501A

    公开(公告)日：2007-05-17

    申请号：JP2007034176

    申请日：2007-02-15

    申请人： Ube Ind Ltd ,  宇部興産株式会社

    发明人： KURODA NOBUYUKI ,  NAKAMURA TAKAHITO

    IPC分类号： C07C51/285 ,  C07B61/00 ,  C07C45/00 ,  C07C49/503 ,  C07C55/00 ,  C07C55/21

    摘要： PROBLEM TO BE SOLVED: To provide a new simple method for producing 2-hydroxycycrododecanone usable as a precursor of useful dibasic acids such as dodecanedioic acid from 1,2-dihydroxy-5,9-cycrododecadiene. SOLUTION: The method for producing dibasic acid comprises oxidizing 2-hydroxycycrododecanone with an oxidizer which 2-hydroxycycrododecanone is obtained by hydrogen reduction of 1,2-dihydroxy-5,9-cycrododecadiene (a) in the presence of a platinum group catalyst, (b) at 0.01-4 MPa hydrogen pressure and (c) at 40°C-230°C reaction temperature. COPYRIGHT: (C)2007,JPO&INPIT

    摘要翻译： 待解决的问题：提供一种用于生产可用作1,2-二羟基-5,9-环十二烷二恶烷等有用二元酸如十二烷二酸的前体的2-羟基环十二烷的新的简单方法。 解决方案：用于生产二元酸的方法包括用氧化剂氧化2-羟基环十二酮，通过在铂族存在下氢还原1,2-二羟基-5,9-十二碳二烯（a）得到2-羟基环十二烷酮 催化剂，（b）在0.01-4MPa氢气压力和（c）在40℃-230℃的反应温度。 版权所有（C）2007，JPO＆INPIT

    3.
    发明专利
    失效

    公开(公告)号：JP2000503343A

    公开(公告)日：2000-03-21

    申请号：JP52542497

    申请日：1997-01-10

    IPC分类号： C07C69/34 ,  C07C55/00 ,  C25B3/10

    摘要： Electrolytic hydrodimeric coupling of dialkyl maleates in alkanol solutions containing an alkanol-soluble alkali metal alkoxide/quaternary ammonium tetrafluoroborate mixed supporting electrolyte yields tetraalkyl 1,2,3,4-butanetetracarboxylates.

    RACEMIZATION OF OPTICALLY ACTIVE CHRYSANTHEMUM-MONOCARBOXYLIC ACIDS
    7.
    发明专利
    RACEMIZATION OF OPTICALLY ACTIVE CHRYSANTHEMUM-MONOCARBOXYLIC ACIDS 失效

    公开(公告)号：JPS63238037A

    公开(公告)日：1988-10-04

    申请号：JP7335587

    申请日：1987-03-26

    申请人： SUMITOMO CHEMICAL CO

    发明人： SUZUKAMO TAKEO ,  SAKITO YOJI ,  FUKAO MASAMI

    IPC分类号： C07C69/747 ,  B01J31/00 ,  B01J31/02 ,  C07B55/00 ,  C07B61/00 ,  C07C51/00 ,  C07C51/353 ,  C07C55/00 ,  C07C61/37 ,  C07C67/00

    摘要： PURPOSE:To obtain the titled compounds useful as a raw material for pyrethroid based insecticides, by carrying out recemization of optically active chrysanthemum-monocarboxylic acids in the coexistence of a specific racemizing agent with a peroxide, etc. CONSTITUTION:Optically active chrysanthemum-monocarboxylic acids expressed by the formula (R is H, 1-20C alkyl, cycloalkyl or aralkyl; * indicates asymme tric carbon), such as levo-rotatory chrysanthemum-monocarboxylic acid, are reacted and racemized with at least one compound selected from carboxylic acid bromides, such as acetyl bromide, silicon bromides, such as trimethylsilyl bromide, thionyl bromide and N-brominated compounds, such as N- bromosuccinimide, in the presence of a peroxide, such as tert-butyl hydroperoxide, or azo compound, such as azoisobutyronitrile, in an inert solvent, preferably toluene, etc., at -20-+100 deg.C for several min - 10hr to afford the aimed racemized optically active chrysanthemum-monocarboxylic acids.