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195 条记录 (耗时 0.03 秒)

    Process for the preparation of dialkyl carbonates
    122.
    发明授权
    Process for the preparation of dialkyl carbonates 失效
    制备碳酸二甲酯的方法

    公开(公告)号：US5218135A

    公开(公告)日：1993-06-08

    申请号：US834457

    申请日：1992-02-12

    申请人： Hans-Josef Buysch ,  Alexander Klausener

    发明人： Hans-Josef Buysch ,  Alexander Klausener

    IPC分类号： B01J27/138 ,  B01J31/18 ,  B01J31/24 ,  C07C68/04 ,  C07C68/06 ,  C07C69/96 ,  C07D317/38

    CPC分类号： C07C68/065 ,  C07D317/38 ,  Y02P20/142

    摘要： A process for the preparation of dialkyl carbonates is described in which an alkylene carbonate is first formed from alkylene oxides and CO.sub.2 and this alkylene carbonate is then transesterified with alkanols. Both reaction steps are carried out in the presence of a bifunctional catalyst of the formula[A.sub.a -X.sub.b ].sub.m .multidot.[B.sub.c Y.sub.d ].sub.n (I)wherein A, B, X, Y and the indices a, b, c, d, m and n have the meaning indicated in the description.

    摘要翻译： 描述了制备碳酸二烷基酯的方法，其中首先由环氧烷和CO 2形成碳酸亚烷基酯，然后将这种碳酸亚烃酯与链烷醇进行酯交换。 两种反应步骤均在式[Aa-Xb] mx [BcYd] n（I）的双功能催化剂存在下进行，其中A，B，X，Y和指数a，b，c，d，m和 n具有说明书中指出的含义。

    Process for the preparation of di- and trialkyl-4'-phthalimidomethylfurocoumarins
    123.
    发明授权
    Process for the preparation of di- and trialkyl-4'-phthalimidomethylfurocoumarins 失效
    制备二 - 和三亚苄基-4'-邻二甲酰氧基甲酰胺的方法

    公开(公告)号：US5099031A

    公开(公告)日：1992-03-24

    申请号：US608046

    申请日：1990-10-31

    申请人： Gamal Mikhail ,  Hans-Josef Buysch

    发明人： Gamal Mikhail ,  Hans-Josef Buysch

    IPC分类号： C07D493/04

    CPC分类号： C07D493/04

    摘要： Di- and trialkyl-4'-phthalimidomethyl-furocoumarins are prepared by reacting di- or trialkyl-furocoumarins in the presence of an acid and, if appropriate, of a polar solvent with a compound of the formula (I) ##STR1## in which R" represents hydrogen, a second phthalimidomethyl group, C.sub.1 - to C.sub.4 -alkyl or C.sub.1 - to C.sub.6 -acyl,where, when using trialkyl-furocoumarins, R" does not represent hydrogen.

    摘要翻译： 二 - 和三烷基-4'-邻苯二甲酰亚氨基甲基 - 呋喃香豆素通过二酸或三烷基 - 呋喃香豆素在酸和（如果合适的话）极性溶剂与式（I）化合物的存在下反应制备。 ）其中R“表示氢，第二苯二甲酰亚氨基甲基，C 1至C 4 - 烷基或C 1至C 6酰基，其中当使用三烷基 - 呋喃香豆素时，R”不表示氢。

    Process for the preparation of N-alkylated anilines
    125.
    发明授权
    Process for the preparation of N-alkylated anilines 失效
    N-烷基化苯胺的制备方法

    公开(公告)号：US5055617A

    公开(公告)日：1991-10-08

    申请号：US552277

    申请日：1990-07-12

    申请人： Peter Wimmer ,  Hans-Josef Buysch ,  Lothar Puppe ,  Christian Froehlich

    发明人： Peter Wimmer ,  Hans-Josef Buysch ,  Lothar Puppe ,  Christian Froehlich

    IPC分类号： C07C209/18 ,  C07C211/48

    CPC分类号： C07C209/18

    摘要： Anilines or N-alkyl-anilines are advantageously reacted with alkyl alcohols or the associated dialkyl ethers at elevated temperature in the gas phase, if a .gamma.-Al.sub.2 O.sub.3 is used that is prepared by dehydration of an aluminum oxide/hydroxide hydrate and has a BET surface area from 50 to 400 m.sup.2 /g and a surface acidity of 5 to 600 mmol H.sup.+ /kg.

    摘要翻译： 如果使用通过氧化铝/氢氧化物水合物的脱水制备并具有BET表面的γ-Al 2 O 3，则苯胺或N-烷基苯胺有利地在气相中在升高的温度下与烷基醇或相关联的二烷基醚反应 面积为50〜400m2 / g，表面酸度为5〜600mmol H + / kg。

    Process for the preparation of oligophenyls dihalogenated in the 4,4'-position
    126.
    发明授权
    Process for the preparation of oligophenyls dihalogenated in the 4,4'-position 失效
    制备4,4'-位二卤代低聚苯基的方法

    公开(公告)号：US5053566A

    公开(公告)日：1991-10-01

    申请号：US571956

    申请日：1990-08-23

    申请人： Artur Botta ,  Hans-Josef Buysch ,  Lothar Puppe

    发明人： Artur Botta ,  Hans-Josef Buysch ,  Lothar Puppe

    IPC分类号： C07C41/22 ,  B01J29/50 ,  B01J29/60 ,  B01J29/70 ,  C07B61/00 ,  C07C17/12 ,  C07C25/18 ,  C07C41/38 ,  C07C43/225

    CPC分类号： C07C17/12

    摘要： Oligophenyls dihalogenated in the 4,4'-position, of the formula ##STR1## can be prepared by catalyzed halogenation of oligophenyls of the formula ##STR2## wherein, in the formulae, X.sup.1 and X.sup.2 independently of one another represent chlorine or bromine, preferably chlorine,X.sup.3 denotes hydrogen, chlorine or bromine, preferably hydrogen or chlorine and particularly preferably hydrogen,R.sup.1, R.sup.2 and R.sup.3 independently of one another represent hydrogen, C.sub.1 -C.sub.4 -alkyl (preferably methyl or ethyl and particularly preferably methyl), C.sub.1 -C.sub.4 -alkoxy (preferably methoxy or ethoxy and particularly preferably methoxy), fluorine, chlorine or bromine anda assumes the value zero or one,with halogenating agents, the preparation being carried out in the presence of methylene chloride or solvent mixtures essentially containing methylene chloride and in the presence of zeolites of the L structure type which contain metal cations.

    摘要翻译： 在式（Ⅰ）的4,4'-位上二卤代的低级苯基可以通过式（II）的低聚苯基的催化卤化来制备，其中在式中X1和X2彼此独立地 代表氯或溴，优选氯，X3表示氢，氯或溴，优选氢或氯，特别优选氢，R 1，R 2和R 3彼此独立地表示氢，C 1 -C 4烷基（优选甲基或乙基，特别优选 甲基），C1-C4-烷氧基（优选甲氧基或乙氧基，特别优选甲氧基），氟，氯或溴，并且与卤化剂呈现零或一个值，该制剂在二氯甲烷或溶剂存在下进行 基本上含有二氯甲烷的混合物和在含有金属阳离子的L结构类型的沸石的存在下。