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    4.
    发明专利
    未知

    公开(公告)号：DE3869473D1

    公开(公告)日：1992-04-30

    申请号：DE3869473

    申请日：1988-05-27

    Applicant: HOECHST AG

    Inventor： HECK DIETER ,  HEISE HARTMUT DR ,  HINTZMANN MANFRED DR

    IPC: C07C205/38 ,  C07C67/00 ,  C07C201/00 ,  C07C201/12 ,  C07C205/31 ,  C07C205/37

    Abstract: Prodn. of 2,4-dinitrophenyl ethers of formula (I) is effected by reacting a mixt. of 1 mole 2,4-dinitrochlorobenzene (II) and 1-3 moles anhydrous alkali metal carbonate (III) in an alcohol of formula ROH (IV) at 20-150 deg.C, opt. under pressure; R1 = 1-6C alkyl or (1-4C)alkoxy(1-4C)alkyl. Pref. (III) is K2CO3. The (III):(II) molar ratio is 1.05-1.8:1. The reaction is effected at 40-120 deg.C., opt. in the presence of an inert diluent.

    7.
    发明专利
    未知

    公开(公告)号：DE58904300D1

    公开(公告)日：1993-06-17

    申请号：DE58904300

    申请日：1989-02-03

    Applicant: HOECHST AG

    Inventor： HEISE HARTMUT DR ,  HINTZMANN MANFRED DR

    IPC: B01J23/755 ,  C07B61/00 ,  C07C231/02 ,  C07C233/25 ,  C07C233/43

    Abstract: Process for the preparation of 4-acylamino-2-aminoalkoxybenzenes of the formula (1) … … in which R denotes a C1-C6-alkyl or C1-C4-alkoxy-C1-C4-alkylene group and R' denotes a methyl or ethyl group, by pumping a solution or suspension of a 2,4-dinitroalkoxybenzene of the formula (2) … … in which R has the said meaning, in a butyl acetate into a suspension of a nickel catalyst on a kieselguhr support in butyl acetate, which is initially introduced into an autoclave and stirred, at a hydrogen pressure of about 5 to 50 bar and a temperature of about 60 to about 120 DEG C at a rate which corresponds to the rate of hydrogenation of the 2,4-dinitroalkoxybenzene to the 2,4-diaminoalkoxybenzene, removing water from the reduction solution by azeotropic distillation after the hydrogenation and acylating the resultant 2,4-diaminoalkoxybenzene with about 0.90 to about 0.99 mol of the anhydride of an alkyl- monocarboxylic acid of 2 to 3 C atoms, relative to 1 mol of 2,4-diaminoalkoxybenzene, at about -5 to about +15 DEG C.

    8.
    发明专利
    未知

    公开(公告)号：DE3737919A1

    公开(公告)日：1989-05-18

    申请号：DE3737919

    申请日：1987-11-07

    Applicant: HOECHST AG

    Inventor： HEISE HARTMUT DR ,  HINTZMANN MANFRED DR

    IPC: C07B61/00 ,  B01J31/02 ,  C07C67/00 ,  C07C201/00 ,  C07C201/12 ,  C07C205/19 ,  C07C205/37

    Abstract: O-Nitrophenetol is prepared by exposing 1 mol of o-nitrochlorobenzene to the action of about 1.05 to about 1.4 mol of ethanol in the presence of a phase-transfer catalyst in about 40 to about 70 per cent strength by weight alkali metal hydroxide solution at temperatures of about 50 to about 80 DEG C in such a manner that the ethanol concentration of the reaction mixture does not exceed 1.5 per cent by weight during the entire course of the reaction.

    9.
    发明专利
    未知

    公开(公告)号：DE3720836A1

    公开(公告)日：1988-12-08

    申请号：DE3720836

    申请日：1987-06-24

    Applicant: HOECHST AG

    Inventor： HECK DIETER ,  HEISE HARTMUT DR ,  HINTZMANN MANFRED DR

    IPC: C07C205/38 ,  C07C67/00 ,  C07C201/00 ,  C07C201/12 ,  C07C205/31 ,  C07C205/37 ,  C07C79/35 ,  C07C76/02

    Abstract: A process for the preparation of 2,4-dinitrophenyl ethers of the general formula (1) (1) in which R denotes an alkyl(C1-C6) or alkoxy(C1-C4)alky(C1-C4) group by reacting 1 mole of 2,4-dinitrochlorobenzene in the anhydrous alcohol which is required for the ether formation and is of the general formula (2) R-OH (2) in which R has the abovementioned meaning, in the presence of 1.0 to 3.0 mole of an anhydrous alkali metal carbonate, at temperatures of 20 DEG C. to 150 DEG C., where appropriate under pressure.

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