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    Catalytic reduction of dinitrobenzenes using a noble metal catalyst and iron or iron salts
    82.
    发明授权
    Catalytic reduction of dinitrobenzenes using a noble metal catalyst and iron or iron salts 失效
    使用贵金属催化剂和铁或铁盐催化还原二硝基苯

    公开(公告)号：US5105012A

    公开(公告)日：1992-04-14

    申请号：US595901

    申请日：1990-10-11

    申请人： George Theodoridis

    发明人： George Theodoridis

    IPC分类号： C07C209/36

    CPC分类号： C07C209/365

    摘要： There is provided an improved process for the reduction of optionally substituted dinitrobenzenes to the corresponding nitroanilines with high yields which comprises contacting the dinitrobenzene with hydrogen in an acidic medium in the presence of a catalytic amount of a combination of a noble metal hydrogenation catalyst, and iron or an iron salt. Isomer specific reductions may be achieved with those compounds containing suitable directing substituents.The 2-halo-5-nitroanilines which may be produced in this process may be converted via a multi-step synthesis to useful 1-aryl-4-substituted 1,4-dihydro-5H-tetrazol-5-one herbicides.

    摘要翻译： 提供了一种用于以高收率将任选取代的二硝基苯还原成相应的硝基苯胺的改进方法，其包括在催化量的贵金属氢化催化剂和铁的组合存在下，在酸性介质中使二硝基苯与氢接触 或铁盐。 可以通过含有合适导向取代基的那些化合物来实现异构体特异性降低。 可以在该方法中生产的2-卤代-5-硝基苯胺可以通过多步合成转化为有用的1-芳基-4-取代的1,4-二氢-5H-四唑-5-酮除草剂。

    Supported copper catalyst, process for its preparation and process for the preparation of N-alkylated aromatic amines using this copper catalyst
    84.
    发明授权
    Supported copper catalyst, process for its preparation and process for the preparation of N-alkylated aromatic amines using this copper catalyst 失效
    支持铜催化剂，其制备方法及使用该铜催化剂制备N-烷基化芳族氨基酸的方法

    公开(公告)号：US5097071A

    公开(公告)日：1992-03-17

    申请号：US585590

    申请日：1990-09-20

    申请人： Otto Immel ,  Hans-Helmut Schwarz ,  Rudolf Braden

    发明人： Otto Immel ,  Hans-Helmut Schwarz ,  Rudolf Braden

    IPC分类号： B01J23/889 ,  C07B61/00 ,  C07C209/18 ,  C07C209/36 ,  C07C211/48

    CPC分类号： B01J23/8892 ,  C07C209/18 ,  C07C209/36

    摘要： The novel copper catalyst on an Al.sub.2 O.sub.3 -containing carrier which is impregnated with compounds of manganese and of one or more rare earth metals, having a Cu content of 0.1-5% by weight, a total content of compounds of manganese and of the rare earth metal or metals of 0.05 to 8% by weight, calculated as metals, is described, the weight ratio of rare earth metal(s) to manganese being 5:1-1:5, calculated as metal, and all percentages being relative to the total weight of the catalyst. Such catalyst is prepared by first impregnating the carrier with compounds of manganese and of the rare earth metal or metals, then fixing the copper salt on the impregnated carrier and activating the catalyst in a preferred manner by treatment with H.sub.2 at 150.degree. to 350.degree. C. Such a catalyst is suitable, for example, for the N-alkylation of aromatic amines with alkanols, where the aromatic amines can be prepared from the parent nitro compounds in an alkylation reactor with simultaneous addition of H.sub.2.

    摘要翻译： 在含有Al 2 O 3的载体上的新型铜催化剂，其浸渍有锰和一种或多种稀土金属的化合物，其Cu含量为0.1-5重量％，锰和稀土化合物的总含量 以金属计算为0.05〜8重量％的金属或金属，稀土金属与锰的重量比为5:1-1:5，以金属计算，所有百分比均相对于 催化剂的总重量。 这种催化剂是通过首先用锰和稀土金属或金属的化合物浸渍载体，然后将铜盐固定在浸渍的载体上并以优选的方式通过在150-350℃下用H 2处理来活化催化剂来制备的。 这种催化剂适用于芳族胺与链烷醇的N-烷基化，其中芳族胺可以在烷基化反应器中由母体硝基化合物制备，同时加入H 2。

    Process and intermediates for the preparation of 2,6-difluoroaniline
    86.
    发明授权
    Process and intermediates for the preparation of 2,6-difluoroaniline 失效
    制备2,6-二氟苯胺的方法和中间体

    公开(公告)号：US5041674A

    公开(公告)日：1991-08-20

    申请号：US537975

    申请日：1990-06-14

    申请人： R. Garth Pews ,  James A. Gall

    发明人： R. Garth Pews ,  James A. Gall

    IPC分类号： C07C209/36 ,  C07C211/52

    CPC分类号： C07C211/52 ,  C07C209/365

    摘要： 1-Chloro-3,5-difluorobenzene is chlorinated to give 4,6-difluoro-1,2,3-trichlorobenzene which in turn is nitrated and reduced to the corresponding novel aniline, 2,6-difluoro-3,4,5-trichloroaniline. Further reduction of this aniline provides 2,6-difluoroaniline with high selectivity.

    摘要翻译： 氯化1-氯-3,5-二氟苯，得到4,6-二氟-1,2,3-三氯苯，然后将其硝化并还原成相应的新型苯胺，2,6-二氟-3,4,5 三氯苯胺 该苯胺的进一步还原提供了高选择性的2,6-二氟苯胺。

    Process for producing aminobenzylamine
    87.
    发明授权
    Process for producing aminobenzylamine 失效
    生产氨基苄胺的方法

    公开(公告)号：US4978792A

    公开(公告)日：1990-12-18

    申请号：US323087

    申请日：1989-03-14

    申请人： Teruyuki Nagata ,  Akihiro Tamaki ,  Katsuzi Watanabe ,  Akihiro Yamaguchi

    发明人： Teruyuki Nagata ,  Akihiro Tamaki ,  Katsuzi Watanabe ,  Akihiro Yamaguchi

    IPC分类号： C07C209/36

    CPC分类号： C08G59/504 ,  C07C209/36

    摘要： A commercially advantageous process for producing m- or p-aminobenzylamine is provided, which is characterized by subjecting m- or p-nitrobenzaldehyde and ammonia to catalytic reduction in the presence of a reducing catalyst in an organic solvent; in the reduction, when nitrobenzaldehyde and ammonia are in advance made a mixed solution in an organic solvent, and this solution is added in divided manner, the yield being further improved.

    摘要翻译： 提供了一种商业上有利的生产对 - 或对氨基苄胺的方法，其特征在于在还原催化剂存在下在有机溶剂中使对 - 硝基苯甲醛和氨进行催化还原; 在还原时，预先将硝基苯甲醛和氨在有机溶剂中制成混合溶液，分开加入该溶液，进一步提高收率。