Process for producing 4-Nitrosodiphenylamines or their salts
    13.
    发明授权
    Process for producing 4-Nitrosodiphenylamines or their salts 失效
    制备4-亚硝基二苯胺或其盐的方法

    公开(公告)号:US5648543A

    公开(公告)日:1997-07-15

    申请号:US466239

    申请日:1995-06-06

    IPC分类号: C07C209/68 C07C207/00

    CPC分类号: C07C209/68

    摘要: Disclosed is a process for producing a 4-nitrosodiphenylamine of the formula (2) ##STR1## wherein R.sub.1 and R.sub.2 independently represent hydrogen atom, methyl group, ethyl group, cyclohexyl group, methoxy group, ethoxy group or chlorine or bromine atom, or a salt thereof, comprising treating a diphenylamine represented by the formula (1) ##STR2## wherein R.sub.1 and R.sub.2 are as defined above with (i) a mixture of nitrogen oxides, (ii) a hydrogen halide and (iii) an aliphatic alcohol, wherein the atomic ratio of oxygen to nitrogen of the mixture of nitrogen oxides is more than 1.0 and less than 2.0. This process produces 4-nitrosodiphenylamine of the formula (2) or a salt thereof conveniently and effectively, and is industrially advantageous.

    摘要翻译: 公开了一种制备式(2)的4-亚硝基二苯胺的方法,其中R1和R2独立地表示氢原子,甲基,乙基,环己基,甲氧基,乙氧基或氯或溴原子 或其盐,其包括处理由式(1)表示的二苯胺其中R 1和R 2如上定义,其中(i)氮氧化物的混合物,(ⅱ)卤化氢和(ⅲ) )脂族醇,其中氮氧化物混合物中氧与氮的原子比大于1.0且小于2.0。 该方法方便有效地产生式(2)的4-亚硝基二苯胺或其盐,在工业上是有利的。

    Nitrosation process
    14.
    发明授权
    Nitrosation process 失效
    亚硝化过程

    公开(公告)号:US4242277A

    公开(公告)日:1980-12-30

    申请号:US43905

    申请日:1979-05-30

    CPC分类号: C07C209/76

    摘要: In the process of subjecting a compound selected from phenols, N,N-dialkylanilines and mixtures thereof to nitrosation reaction conditions using a nitrite in an aqueous system to prepare nitrosated products selected from benzoquinone oximes and p-nitroso-N,N-dialkylanilines, the nitrosation reaction is advantageously carried out in the presence of an acid stronger than nitrous acid an organic acid of pKa 2 to pKa 5 or a salt thereof and water, the quantities of the organic acid and water being up to 5 times by mole and up to 10 times by weight the quantity of the compound to be nitrosated, respectively.

    摘要翻译: 在选自苯酚,N,N-二烷基苯胺及其混合物的化合物的亚硝化反应条件下,使用亚硝酸盐在水性体系中制备选自苯醌肟和对亚硝基-N,N-二烷基苯胺的亚硝化产物的方法中, 亚硝化反应有利地在比亚硝酸,pKa 2至pKa 5的有机酸或其盐和水强的酸的存在下进行,有机酸和水的量高达5倍摩尔,直到 分别为亚硝化化合物的量的10倍。

    Methods for producing aminonitrobenzoic acids
    19.
    发明授权
    Methods for producing aminonitrobenzoic acids 有权
    制备氨基硝基苯甲酸的方法

    公开(公告)号:US08835677B2

    公开(公告)日:2014-09-16

    申请号:US12579144

    申请日:2009-10-14

    CPC分类号: C07C227/04 C07C229/56

    摘要: Methods of producing aminonitrobenzoic acids are disclosed. A dinitrobenzoic acid may be reduced to an aminonitrobenzoic acid. In some specific embodiments, 2,6-initrobenzoic acid may be converted to 2-amino-6-nitrobenzoic acid. An end product may be used as an intermediate in the manufacture of various compounds including agricultural chemicals and pharmaceuticals.

    摘要翻译: 公开了制备氨基硝基苯甲酸的方法。 二硝基苯甲酸可以还原成氨基硝基苯甲酸。 在一些具体实施方案中,2,6-过二丙酸可转化为2-氨基-6-硝基苯甲酸。 最终产品可用作制造包括农药和药物在内的各种化合物的中间体。