Method for preparing aromatic secondary amino compound
    65.
    发明授权
    Method for preparing aromatic secondary amino compound 失效
    芳香族仲氨基化合物的制备方法

    公开(公告)号:US5618980A

    公开(公告)日:1997-04-08

    申请号:US640022

    申请日:1996-04-30

    摘要: Disclosed are (1) a method for preparing an aromatic secondary amino compound which comprises reacting an N-cyclohexylideneamino compound in the presence of a hydrogen moving catalyst and a hydrogen acceptor by the use of a sulfur-free polar solvent and/or a cocatalyst, and(2) a method for preparing an aromatic secondary amino compound which comprises reacting cyclohexanone or a nucleus-substituted cyclohexanone, an amine and a nitro compound corresponding to the amine in a sulfur-free polar solvent in the presence of a hydrogen moving catalyst, a cocatalyst being added or not added. In a further aspect, a method is provided for the preparation of aminodiphenylamine by reacting phenylenediamine and cyclohexanone in the presence of a hydrogen transfer catalyst in a sulfur-free polar solvent while using nitroaniline as a hydrogen acceptor.

    摘要翻译: 公开的是(1)一种制备芳香族仲氨基化合物的方法,其包括在氢移动催化剂和氢受体存在下,通过使用无硫极性溶剂和/或助催化剂使N-亚环己基氨基化合物反应, 和(2)一种制备芳族仲氨基化合物的方法,其包括在氢移动催化剂存在下,在无硫极性溶剂中使环己酮或核取代的环己酮,对应于胺的胺和硝基化合物反应, 添加或不添加助催化剂。 在另一方面,提供了一种通过在氢转移催化剂存在下,在无硫极性溶剂中使苯二胺和环己酮反应制备氨基二苯胺的方法,同时使用硝基苯胺作为氢受体。

    Process for producing 1,3-dialkyl-2-imidazolidinone
    66.
    发明授权
    Process for producing 1,3-dialkyl-2-imidazolidinone 失效
    1,3-二烷基-2-咪唑啉酮的制备方法

    公开(公告)号:US5583256A

    公开(公告)日:1996-12-10

    申请号:US494735

    申请日:1995-06-26

    IPC分类号: C07C275/14 C07D233/34

    CPC分类号: C07D233/34 C07C275/14

    摘要: A novel bis-urea compound, preparation process of the compound, and preparation process of 1,3-dialkyl-2-imidazolidinone are disclosed and the disclosure provides a novel preparation process of 1,3-dialkyl-2-imidazolidinone and simultaneously enables effective utilization of N,N',N"-trialkyldiethylentriamine which lacks a large amount use and is desired to develop new application.

    摘要翻译: 公开了一种新的双脲化合物,该化合物的制备方法和1,3-二烷基-2-咪唑烷酮的制备方法,本公开提供了1,3-二烷基-2-咪唑烷酮的新型制备方法,同时使得有效 利用缺乏大量使用的N,N',N“ - 三烷基二乙基三胺,需要开发新的应用。

    Process for the preparation of diphenylamine or nucleus-substituted
derivative thereof
    67.
    发明授权
    Process for the preparation of diphenylamine or nucleus-substituted derivative thereof 失效
    二苯胺或其取代衍生物的制备方法

    公开(公告)号:US5545752A

    公开(公告)日:1996-08-13

    申请号:US458294

    申请日:1995-06-02

    IPC分类号: C07C209/18 C07C209/28

    CPC分类号: C07C209/18 C07C209/28

    摘要: A processes for the preparation of diphenylamine or a nucleus-substituted derivative thereof, which comprise, upon feeding into a reaction system a phenol compound and reacting in the reaction system a cyclohexanone compound with an aniline compound in the presence of a hydrogen transfer catalyst and a catalytic amount of the cyclohexanone compound corresponding to the phenol compound while using the phenol compound as a hydrogen acceptor and forming the cyclohexanone compound in the reaction system, (1) conducting reaction while adding dropwise the aniline compound and (2) employing a hydroxide, carbonate or bicarbonate of an alkali metal and/or alkaline earth metal when the hydrogen transfer catalyst is one of noble metals of Group VIII of the periodic table, respectively.

    摘要翻译: 一种二苯胺或其取代衍生物的制备方法,其包括在反应体系中加入酚化合物,并在氢转移催化剂存在下使反应体系中的环己酮化合物与苯胺化合物反应, 催化量的对应于酚化合物的环己酮化合物,同时使用酚化合物作为氢受体并在反应体系中形成环己酮化合物,(1)在滴加苯胺化合物的同时进行反应,和(2)使用氢氧化物,碳酸酯 或氢过渡催化剂分别为周期表第Ⅷ族贵金属之一时,碱金属和/或碱土金属的碳酸氢盐。

    Process for the preparation of diphenylamine
    68.
    发明授权
    Process for the preparation of diphenylamine 失效
    二苯胺制备方法

    公开(公告)号:US5449829A

    公开(公告)日:1995-09-12

    申请号:US260903

    申请日:1994-06-15

    CPC分类号: C07C209/28 C07C209/26

    摘要: A diphenylamine with both the phenyl groups being substituted is prepared by reacting a phenol with ammonia in the presence of a hydrogen transfer catalyst and a cyclohexanone; or by converting a portion of the phenol to the cyclohexanone in the presence of a hydrogen transfer catalyst and under hydrogen pressure and then reacting the remaining portion of the phenol with ammonia in the presence of the cyclohexanone so converted and the hydrogen transfer catalyst. The diphenylamine can be obtained very efficiently.

    摘要翻译: 具有两个苯基取代的二苯胺通过在氢转移催化剂和环己酮的存在下使苯酚与氨反应来制备; 或者通过在氢转移催化剂的存在下和在氢气压力下将一部分酚转化为环己酮,然后在所转化的环己酮和氢转移催化剂的存在下使酚的剩余部分与氨反应。 可以非常有效地获得二苯胺。

    Process for producing cyclic ureas
    70.
    发明授权
    Process for producing cyclic ureas 失效
    生产环脲的方法

    公开(公告)号:US4918186A

    公开(公告)日:1990-04-17

    申请号:US320228

    申请日:1989-03-07

    摘要: A process for producing a cyclic urea is provided. The process comprises reacting a diamine expressed by the formula (II)R-HN-R'-NH-R (II)wherein R represents hydrogen atom or a lower alkyl group and R' represent dimethylene group, a lower alkyl group-substituted dimethylene group, trimethylene group, a lower alkyl group-substituted trimethylene group, tetramethylene group, a lower alkyl group-substituted tetramethylene group, but a case where R represents hydrogen atom and R' represent dimethylene group, a case where R represents hydrogen atom and R' represents a lower alkyl group-substituted dimethylene group and a case where R represent methyl group and R' represents dimethylene group are excluded, with phosgene in the presence of a dehydrochlorinating agent. In the process, the diamine is first converted to its hydrochloride, followed by reacting the hydrochloride with phosgene in water solvent while maintaining a pH of the reaction liquid in the range of 5.0 to 8.0 by said dehydrochlorinating agent to obtain a cyclic urea expressed by the formula (I) ##STR1## wherein R and R' are each as defined above.

    摘要翻译: 提供了一种制备环状尿素的方法。 该方法包括使由式(II)R-HN-R'-NH-R(II)表示的二胺反应,其中R表示氢原子或低级烷基,R'表示二亚甲基,低级烷基取代的二亚甲基 基团,三亚甲基,低级烷基取代的三亚甲基,四亚甲基,低级烷基取代的四亚甲基,但是R表示氢原子,R'表示二亚甲基的情况,R表示氢原子,R '表示低级烷基取代的二亚甲基,并且在脱氯化氢剂的存在下,光气被排除在外,R表示甲基,R'表示二亚甲基的情况。 在此过程中,首先将二胺转化为盐酸盐,然后将盐酸盐与光气在水溶剂中反应,同时用上述脱氯化氢将反应液的pH值保持在5.0〜8.0的范围内,得到由 式(I)其中R和R'各自如上所定义。