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    PROCESS FOR THE PREPARATION OF 4-ACYLAMINO-2-AMINOALKOXY-BENZENES
    4.
    发明专利
    PROCESS FOR THE PREPARATION OF 4-ACYLAMINO-2-AMINOALKOXY-BENZENES 未知

    公开(公告)号：CA1310019C

    公开(公告)日：1992-11-10

    申请号：CA590714

    申请日：1989-02-10

    Applicant: HOECHST AG

    Inventor： HEISE HARTMUT ,  HINTZMANN MANFRED

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

    Abstract: HOE 88/F 029 A process for the preparation of 4-acylamino-2-amino-alkoxybenzenes of the general formula (1) (1) in which R denotes an alkyl-C1-C6- or alkoxy-C1-C4-alkylene-C1-C4 group and R' denotes a methyl or ethyl group, by pumping a solution or suspension of a 2,4-di-nitroalkoxybenzene of the general formula (2) (2) in which R has the abovementioned meaning, in a butyl acetate into a stirred suspension of a nickel catalyst on a kieselguhr carrier in butyl acetate, which has been initially introduced into an autoclave, at a hydrogen pressure of about 5 to about 50 bar, and a temperature of about 60 to about 120.degree.C, at a rate which corresponds to the rate of hydrogenation of 2,4-dinitroalkoxybenzene to 2,4-diaminoalkoxybenzene, dehydrating the reduction solution by azeotropic distillation, after the hydrogenation, and acylating the resulting 2,4-diaminoalkoxybenzene with about 0.90 to 0.99 mole of the anhydride of an alkylmonocarboxylic acid having 2 to 3 carbon atoms, relative to 1 mole of 2,4-diaminoalkoxybenzene, at about -5 to about +15.degree.C

    7.
    发明专利
    未知

    公开(公告)号：BR8900600A

    公开(公告)日：1989-10-10

    申请号：BR8900600

    申请日：1989-02-10

    Applicant: HOECHST AG

    Inventor： HEISE HARTMUT ,  HINTZMANN MANFRED

    IPC: B01J23/755 ,  C07B61/00 ,  C07C231/02 ,  C07C233/25 ,  C07C233/43 ,  C07C103/44

    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.

    PREPARING BENZOXAZOLONES-%2< AND BENZOTHIAZOLONES-%2<
    8.
    发明专利
    PREPARING BENZOXAZOLONES-%2< AND BENZOTHIAZOLONES-%2< 未知

    公开(公告)号：AU4375572A

    公开(公告)日：1974-01-03

    申请号：AU4375572

    申请日：1972-06-22

    Applicant: HOECHST AG

    Inventor： HEISE HARTMUT ,  MEES BERNHARD

    IPC: C07D263/58 ,  C07D277/68 ,  C07D85/36 ,  C07D91/24

    Abstract: 1371688 Preparation of benzoxalones-(2) and benzothiazolones-(2) FARBWERKE HOECHST AG 22 June 1972 [24 June 1971] 29273/72 Heading C2C Benzoxazolanes - (2) and benzothiazolones- (2) of general formula where R represents hydrogen, halogen, C 1 -C 3 alkyl or C 1 -C 3 alkyloxy and X is O or S are prepared by condensing urea in solution, preferably aqueous, in the presence of an acid, with an aminophenol or an aminothiophenol of formula the pH of the reaction mixture not exceeding 7. The acid catalyst may be sulphuric, hydrochloric, phosphoric or hydrobromic acid and preferably 1À5 to 3 moles of urea are used per mol of aminophenol or aminothiophenol.

    9.
    发明专利
    未知

    公开(公告)号：MX170939B

    公开(公告)日：1993-09-22

    申请号：MX1491789

    申请日：1989-02-13

    Applicant: HOECHST AG

    Inventor： HEISE HARTMUT ,  HINTZMANN MANFRED

    IPC: B01J23/755 ,  C07B61/00 ,  C07C231/02 ,  C07C233/25 ,  C07C233/43 ,  C07C103/44

    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.

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