Dioxydiphthalic anhydride
    4.
    发明公开
    Dioxydiphthalic anhydride 失效
    二氧二邻苯二甲酸酐

    公开(公告)号:EP0398206A1

    公开(公告)日:1990-11-22

    申请号:EP90109010.0

    申请日:1990-05-14

    IPC分类号: C07D307/89 C07D493/14

    CPC分类号: C07D491/14 C07C65/24

    摘要: Dioxydiphthalic anhydride is prepared by the reaction of dihalophthalic anhydride with an alkali metal compound, such as potassium carbonate. The compound is particularly useful as a monomer in the preparation of polyimides.

    摘要翻译: 二氧二邻苯二甲酸酐通过二卤代邻苯二甲酸酐与碱金属化合物如碳酸钾的反应来制备。 该化合物作为制备聚酰亚胺的单体是特别有用的。

    A novel method for ether formation
    5.
    发明公开
    A novel method for ether formation 失效
    Verfahren zur Herstellung vonÄthern。

    公开(公告)号:EP0509241A2

    公开(公告)日:1992-10-21

    申请号:EP92104288.3

    申请日:1992-03-12

    摘要: A process for the preparation of 1,1'-oxy-bis(3-trifluoromethyl-4-nitrobenzene) which comprises reacting a compound of the formula

    where X is F, Cl, Br or I; with an inorganic base selected from the group consisting of alkali metal hydroxides, alkali metal carbonates, and alkali metal bicarbonates, in the presence of a catalytic quantity of a benzoate catalyst. In addition, benzoate esters of 4-nitro-3-(trifluoromethyl)phenol may be isolated.

    摘要翻译: 一种制备1,1'-氧 - 双(3​​-三氟甲基-4-硝基苯)的方法,包括使式(CHEM)化合物,其中X是F,Cl,Br或I; 与选自碱金属氢氧化物,碱金属碳酸盐和碱金属碳酸氢盐的无机碱在催化量的苯甲酸酯催化剂存在下反应。 此外,可以分离4-硝基-3-(三氟甲基)苯酚的苯甲酸酯。

    Preparation of diphenyl ether
    6.
    发明公开
    Preparation of diphenyl ether 失效
    Verfahren zur Herstellung von Diphenylether。

    公开(公告)号:EP0495425A2

    公开(公告)日:1992-07-22

    申请号:EP92100429.7

    申请日:1992-01-13

    摘要: A process for the production of diaryl ethers which comprises heating a compound of the formula

    wherein X and Y may be selected from the group consisting of H, CN, CO₂H, CO₂R, CHO, COR, NO₂, NR3+ CF₃, provided that both X and Y may not simultaneously be H, in a solvent, in the presence of an inorganic base selected from the group consisting of the alkali metal carbonates and bicarbonates, and in the presence of a catalyst selected from the group consisting of benzoic acid, substituted benzoic acids, C2 - C14 aliphatic carboxylic acids, and alkali metal salts of said acids. A novel dinitrodiphenyl ether, a novel diaminodiphenyl ether, and polyimide resins are also disclosed.

    摘要翻译: 一种制备二芳基醚的方法,其包括加热式CHEM的化合物,其中X和Y可以选自H,CN,CO 2 H,CO 2 R,CHO,COR,NO 2,NR 3 + CF 3,条件是 在选自碱金属碳酸盐和碳酸氢盐的无机碱的存在下,在溶剂中,X和Y可以不同时为H,并且在选自苯甲酸, 取代的苯甲酸,C 2 -C 14脂族羧酸和所述酸的碱金属盐。 还公开了一种新型二硝基二苯醚,新型二氨基二苯醚和聚酰亚胺树脂。

    Process for the preparation of oxydiphthalic anhydride and acyloxyphthalic anhydrides
    7.
    发明公开
    Process for the preparation of oxydiphthalic anhydride and acyloxyphthalic anhydrides 失效
    Verfahren zur Herstellung vonOxydiphthalsäureanhydridenundAzyloxyphthalsäureanhydriden。

    公开(公告)号:EP0460687A2

    公开(公告)日:1991-12-11

    申请号:EP91109331.8

    申请日:1991-06-07

    CPC分类号: C07C65/24 C07C51/567

    摘要: A method for the preparation of acyloxyphthalic anhydride or oxydiphthalic anhydride which comprises the reaction of a halophthalic anhydride with an alkali metal salt and at least a catalytically effective amount of an acid or acid derivative selected from the group consisting of benzoic acids, substituted benzoic acids, benzoic acid salts or substituted benzoic acid salts, and hydrolyzable benzoyl esters, and hydrolyzable substituted benzoyl esters, alkyl carboxylic acids, hydrolyzable esters of alkyl carboxylic acids, and salts of alkyl carboxylic acids. The process may be conducted without solvent, in a polar solvent or in a non-polar solvent using a phase transfer catalyst.

    摘要翻译: 一种制备酰氧基邻苯二甲酸酐或氧联二邻苯二甲酸酐的方法,其包括卤代邻苯二甲酸酐与碱金属盐和至少一种催化有效量的酸或酸衍生物的反应,所述酸或酸衍生物选自苯甲酸,取代的苯甲酸, 苯甲酸盐或取代的苯甲酸盐,和可水解的苯甲酰酯,以及可水解的取代的苯甲酰基酯,烷基羧酸,烷基羧酸的可水解的酯和烷基羧酸的盐。 该方法可以在无溶剂的情况下,在极性溶剂中或使用相转移催化剂的非极性溶剂中进行。

    Process for selective hydrodefluorination
    8.
    发明公开
    Process for selective hydrodefluorination 失效
    选择性氢化方法

    公开(公告)号:EP0563986A3

    公开(公告)日:1994-11-23

    申请号:EP93105499.3

    申请日:1993-04-02

    摘要: A process for the selective hydrodefluorination of a tetrafluorophthalimide compound of the formula
    where X is 1 and R is a monovalent organo group; or X is 2 and R is a divalent organo group; comprises reacting (I) the tetrafluorophthalimide with zinc in an aqueous alkali metal hydroxide medium. The product may be hydrolyzed to form 3,4,6-trifluorophthalic acid.

    摘要翻译: 选择性加氢氟化式(CHEM)的四氟邻苯二甲酰亚胺化合物的方法,其中X是1,R是一价有机基团; 或X为2,R为二价有机基团; 包括使(I)四氟邻苯二甲酰亚胺与锌在碱金属氢氧化物介质中反应。 产物可以水解形成3,4,6-三氟邻苯二甲酸。

    Method of making 1,1'-sulfonyl-bis(3-nitro-5-trifluoromethyl)benzene
    10.
    发明公开
    Method of making 1,1'-sulfonyl-bis(3-nitro-5-trifluoromethyl)benzene 失效
    Verfahren zur Herstellung von 1,1'-磺酰基 - 双(3​​-硝基-5-三氟甲基) - 苯。

    公开(公告)号:EP0413193A1

    公开(公告)日:1991-02-20

    申请号:EP90114685.2

    申请日:1990-07-31

    摘要: Disclosed is a method of making 1,1′-sulfonyl-bis(3-nitro-5-­trifluoromethyl) benzene by reacting dibenzotrifluoride sulfide with at least four equivalents of fuming nitric acid and at least four equivalents of fuming sulfuric acid at a temperature below 20°C, until the sulfide link is oxidized to a sulfone link, then raising the temperature to above 20°C until the reaction is complete. Also disclosed is the preparation of 3,3′-sulfonyl-bis(5-trifluoromethyl) benzamine by reducing the benzene compound.

    摘要翻译: 公开了通过使二苯三氟化硫与至少四当量的发烟硝酸和至少四当量的发烟硫酸在低于下述温度下进行反应来制备1,1,1-磺酰基 - 双(3​​-硝基-5-三氟甲基)苯的方法: 20℃,直到硫化物连接被氧化成砜链,然后将温度升至20℃以上直到反应完成。 还公开了通过还原苯化合物制备3,3'-磺酰基 - 双(5-三氟甲基)苯甲胺。