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31 条记录 (耗时 0.018 秒)

    Process for preparing 4,6-dinitroresorcinol
    4.
    发明授权
    Process for preparing 4,6-dinitroresorcinol 失效
    制备4,6-二硝基间苯二酚的方法

    公开(公告)号：US4745232A

    公开(公告)日：1988-05-17

    申请号：US1243

    申请日：1987-01-07

    申请人： Robert J. Schmitt ,  David S. Ross ,  James F. Wolfe

    发明人： Robert J. Schmitt ,  David S. Ross ,  James F. Wolfe

    IPC分类号： C07C201/00 ,  C07C67/00 ,  C07C201/08 ,  C07C205/20 ,  C07C205/23 ,  C07C79/28

    CPC分类号： C07C201/08

    摘要： A method of nitrating resorcinol which is selective for the production of the 4,6-dinitro resorcinal isomer. A resorcinol-based starting material is admixed with a nitrating solution from which substantially all nitrogen dioxide and nitrous has been removed. The nitrating solution contains white fuming nitric acid, a nitrosonium ion control agent such as urea, and, optionally, concentrated sulfuric acid. The 4,6-dinitroresorcinal isomer is provided in yields of about 65-85% with minimal production of undesirable side products.

    摘要翻译： 一种硝化间苯二酚的方法，间苯二酚对于生产4,6-二硝基间苯二酚异构体是有选择性的。 将基于间苯二酚的原料与硝化溶液混合，从其中除去基本上所有的二氧化氮和亚硝酸。 硝化溶液含有白色发烟硝酸，硝基鎓离子控制剂如尿素，以及任选的浓硫酸。 提供的4,6-二硝基间苯二酚异构体的产率约为65-85％，同时产生不希望的副产物。

    Preparation of p-nitrophenolic compounds
    8.
    发明授权
    Preparation of p-nitrophenolic compounds 失效
    对硝基酚类化合物的制备

    公开(公告)号：US5414148A

    公开(公告)日：1995-05-09

    申请号：US249200

    申请日：1994-05-26

    申请人： Pascal Metivier ,  Laurent Bernard

    发明人： Pascal Metivier ,  Laurent Bernard

    IPC分类号： C07C201/06 ,  C07C201/10 ,  C07C205/22 ,  C07C207/04 ,  C07C205/20 ,  C07C205/21 ,  C07C205/26

    CPC分类号： C07C201/00 ,  C07C201/08

    摘要： p-Nitrophenolic compounds, e.g., p-nitrophenol itself, are selectively prepared by (a) reacting a phenolic compound with a nitrosating agent in the presence of sulfuric acid, the concentration of which H.sub.2 SO.sub.4 being at least 60%, (b) oxidizing the p-nitrosophenolic compound thus formed with nitric acid, the concentration of sulfuric acid in the medium of reaction, upon completion of oxidation, being no greater than 80%, and (c) separating the p-nitrophenolic compound which thus precipitates.

    摘要翻译： 通过（a）在硫酸存在下使酚类化合物与亚硝化剂反应，其中H 2 SO 4的浓度为至少60％，（b）将硝基酚类化合物氧化为 由硝酸形成的对亚硝基苯酚化合物，氧化后的反应介质中的硫酸浓度不大于80％，（c）分离因此析出的对硝基酚化合物。

    Cyclohexenol derivatives
    9.
    发明授权
    Cyclohexenol derivatives 失效
    环己酮衍生物

    公开(公告)号：US5169993A

    公开(公告)日：1992-12-08

    申请号：US746975

    申请日：1991-08-19

    申请人： Paul H. Briner

    发明人： Paul H. Briner

    IPC分类号： C07C29/40 ,  C07C35/21 ,  C07C35/50 ,  C07C37/20 ,  C07C39/23 ,  C07C43/23 ,  C07C49/83 ,  C07C69/76 ,  C07C205/20 ,  C07C215/70 ,  C07C233/25 ,  C07C255/53 ,  C07C271/40 ,  C07C317/22 ,  C07C323/19

    CPC分类号： C07C35/50 ,  C07C35/21

    摘要： The invention provides cyclohexenol derivatives of the general formula ##STR1## in which n represents an integer from 0 to 5; each R represents a halogen atom, nitro, cyano, hydroxyl, alkyl, haloalkyl, alkoxy, haloalkoxy, amino, alkylamino, dialkylamino, alkoxycarbonyl, carboxyl, alkanoyl, alkylthio, alkylsulphinyl, alkylsulphonyl, carbamoyl, alkylamido, cycloalkyl or phenyl group; and R.sup.1, R.sup.2 and R.sup.3 independently represent a hydrogen atom or an alkyl group, with the provisos that when R.sup.1, R.sup.2 and R.sup.3 all represent a hydrogen atom then n is not 0 and, when R.sup.1, R.sup.2 and R.sup.3 all represent a hydrogen atom and n is 1, R does not represent a fluorine atom substituted at the 4-position of the phenyl ring; and a process for their preparation. Compounds of formula I are useful as intermediates in the preparation of certain fungicidal active cyclopentane derivatives.

    Aromatic coupling process
    10.
    发明授权
    Aromatic coupling process 失效
    芳香族偶合过程

    公开(公告)号：US4538006A

    公开(公告)日：1985-08-27

    申请号：US606952

    申请日：1984-05-04

    申请人： G. Patrick Stahly

    发明人： G. Patrick Stahly

    IPC分类号： C07C205/20 ,  C07C205/35 ,  C07C79/24

    CPC分类号： C07C201/12

    摘要： 4-(2,4-Dinitrophenyl)phenols are prepared by reacting a 1,3-dinitrobenzene having a replaceable hydrogen in the 4-position with a phenol having a replaceable hydrogen in the 4-position in an inert solvent and in the presence of a strong base. The 1,3-dinitrobenzene and phenol may be substituted or unsubstituted, and preferred phenols include phenol and 2,6-dialkylphenols.

    摘要翻译： 4-（2,4-二硝基苯基）酚是通过在4-位上具有可置换氢的1,3-二硝基苯与4-位上具有可置换氢的苯在惰性溶剂中反应制备的， 强大的基地。 1,3-二硝基苯和苯酚可以是取代或未取代的，优选的酚包括苯酚和2,6-二烷基酚。