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    PROCESS FOR THE PREPARATION OF 4-ALKYLSULFONYL-1-ALKYL-2-CHLOROBENZENES AND SIMILAR COMPOUNDS
    151.
    发明专利
    PROCESS FOR THE PREPARATION OF 4-ALKYLSULFONYL-1-ALKYL-2-CHLOROBENZENES AND SIMILAR COMPOUNDS 未知

    公开(公告)号：ZA921040B

    公开(公告)日：1992-10-28

    申请号：ZA921040

    申请日：1992-02-13

    Applicant: HOECHST AG

    Inventor： FOLZ GEORG ,  GEORG FOLZ ,  PAPENFUHS THEODOR ,  THEODOR PAPENFUHS

    IPC: C07B61/00 ,  B01J27/128 ,  C07C303/22 ,  C07C313/04 ,  C07C315/00 ,  C07C317/14 ,  C07C

    Abstract: Process for the preparation of 4-alkylsulfonyl-1-alkyl-2-chlorobenzenes and like compounds.A process for the preparation of 4-alkyl(C1-C4)-sulfonyl-1-alkyl-2-chlorobenzenes, in very good yields and with high selectivity by selectively chlorinating a p-alkyl-benzenesulfonyl chloride with gaseous chlorine in the presence of a chlorine carrier at 50° C. to 100° C. to give a compound of the formulain which R1 is an alkyl (C1-C4) group, subsequently reducing the latter in an aqueous medium at a pH of 8 to 10 with sodium hydrogen sulfite or sodium sulfite at 40 to 90° C. to give a compound of the formulaand reacting the latter with alkyl(C1-C4) chloride in the presence of an acid binder at 80 to 150° C., and also compounds of the last mentioned formula which, instead of the -SO2Na group contain the -SO2X group (X=hydrogen atom or alkali metal atom).

    PROCESS FOR THE PREPARATION OF 2,3,4,5-TETRAFLUOROBENZOIC ACID
    152.
    发明专利
    PROCESS FOR THE PREPARATION OF 2,3,4,5-TETRAFLUOROBENZOIC ACID 未知

    公开(公告)号：CA2067075A1

    公开(公告)日：1992-10-26

    申请号：CA2067075

    申请日：1992-04-24

    Applicant: HOECHST AG

    Inventor： PAPENFUHS THEODOR ,  PFIRMANN RALF

    IPC: C07C51/00 ,  C07C51/06 ,  C07C63/70

    Abstract: HOE 91/F 119 of the disclosure: Process for the preparation of 2,3,4,5-tetrafluorobenzoic acid A process for the preparation of 2,3,4,5,-tetrafluoro-benzoic acid of the formula (1) (1), by heating N'substituted N-aminotetrafluorophthalLmides of the formula (2) (2), in which X, is the radical , where Rl, R2 are a hydrogen atom, an alkyl-(Cl-C1O)- group, aryl group, alkyl-(C1 -C6) CO- group or aryl-CO- group, it being possible for the aryl or aryl-CO- group in the case of R1 and Rz to be substituted on the aromatic ring by fluorine and/or chlorine atoms and/or alkyl-(C1-C4)-groups, or R1 and R2 together are a phthaloyl radlcal which can be substituted on the aromatic ring by 4 chlorine atoms or 4 fluorine atoms, ox where X is the radical which can be substituted on the aromatic ring by fluorine and/or chlorine atoms and/or alkyl-(C1-C4)- groups, ln an aqueous medium at pH values of approximately -1 to approximately +1 at temperatures of approxi.mately 160 to approximately 220 .degree.C.

    PROCESS FOR PREPARING 4-ALKYLSULFONYL-1-ALKYL-2-CHLOROBENZENES AND THE LIKE
    153.
    发明专利
    PROCESS FOR PREPARING 4-ALKYLSULFONYL-1-ALKYL-2-CHLOROBENZENES AND THE LIKE 未知

    公开(公告)号：AU1176092A

    公开(公告)日：1992-09-15

    申请号：AU1176092

    申请日：1992-01-31

    Applicant: HOECHST AG

    Inventor： FOLZ GEORG ,  PAPENFUHS THEODOR

    IPC: B01J27/128 ,  C07B61/00 ,  C07C303/22 ,  C07C313/04 ,  C07C315/00 ,  C07C317/14

    Abstract: Process for the preparation of 4-alkylsulfonyl-1-alkyl-2-chlorobenzenes and like compounds.A process for the preparation of 4-alkyl(C1-C4)-sulfonyl-1-alkyl-2-chlorobenzenes, in very good yields and with high selectivity by selectively chlorinating a p-alkyl-benzenesulfonyl chloride with gaseous chlorine in the presence of a chlorine carrier at 50° C. to 100° C. to give a compound of the formulain which R1 is an alkyl (C1-C4) group, subsequently reducing the latter in an aqueous medium at a pH of 8 to 10 with sodium hydrogen sulfite or sodium sulfite at 40 to 90° C. to give a compound of the formulaand reacting the latter with alkyl(C1-C4) chloride in the presence of an acid binder at 80 to 150° C., and also compounds of the last mentioned formula which, instead of the -SO2Na group contain the -SO2X group (X=hydrogen atom or alkali metal atom).

    PROCESS FOR THE PREPARATION OF¹4-ALKYLSUL-FONYL-1-ALKYL-2-CHLOROBENZENES AND SIMILAR¹COMPOUNDS
    154.
    发明专利
    PROCESS FOR THE PREPARATION OF¹4-ALKYLSUL-FONYL-1-ALKYL-2-CHLOROBENZENES AND SIMILAR¹COMPOUNDS 未知

    公开(公告)号：IE920469A1

    公开(公告)日：1992-08-12

    申请号：IE920469

    申请日：1992-02-13

    Applicant: HOECHST AG

    Inventor： FOLZ GEORG ,  PAPENFUHS THEODOR

    IPC: C07B61/00 ,  C07C303/22 ,  B01J27/128 ,  C07C313/04 ,  C07C315/00 ,  C07C317/14 ,  C07C309/30

    Abstract: Process for the preparation of 4-alkylsulfonyl-1-alkyl-2-chlorobenzenes and like compounds.A process for the preparation of 4-alkyl(C1-C4)-sulfonyl-1-alkyl-2-chlorobenzenes, in very good yields and with high selectivity by selectively chlorinating a p-alkyl-benzenesulfonyl chloride with gaseous chlorine in the presence of a chlorine carrier at 50° C. to 100° C. to give a compound of the formulain which R1 is an alkyl (C1-C4) group, subsequently reducing the latter in an aqueous medium at a pH of 8 to 10 with sodium hydrogen sulfite or sodium sulfite at 40 to 90° C. to give a compound of the formulaand reacting the latter with alkyl(C1-C4) chloride in the presence of an acid binder at 80 to 150° C., and also compounds of the last mentioned formula which, instead of the -SO2Na group contain the -SO2X group (X=hydrogen atom or alkali metal atom).

    PROCESS FOR PREPARING 1,4-BIS-(4-HYDROXYBENZOYL)-BENZENE
    155.
    发明专利
    PROCESS FOR PREPARING 1,4-BIS-(4-HYDROXYBENZOYL)-BENZENE 未知

    公开(公告)号：CA2062783A1

    公开(公告)日：1990-12-31

    申请号：CA2062783

    申请日：1990-06-25

    Applicant: HOECHST AG

    Inventor： HACKENBRUCH JOACHIM ,  PAPENFUHS THEODOR

    IPC: B01J31/02 ,  C07B61/00 ,  C07C45/64 ,  C07C49/83

    Abstract: HOE 89/F 202 Process for the preparation of 1,4-bis(4-hyrobybenzoyl)-benzene A process for the preparation of 1,4-bis(4-hydroxy-benzoyl)benzene of the formula (I) (I) by reacting a 1,4-bis(4-halobenzoyl)benzene of the formula (II) (II) in which X is a fluorine, chlorine or bromine atom, with an alkali metal hydroxide ox alkaline earth metal hydroxide or with mixtures of these hydroxides in a solvent which is inert to the reaction components under the reaction conditions at temperatures of about 100.degree.C to about 250.degree.C, if appropriate in the presence of a phase transfer catalyst.

    156.
    发明专利
    未知

    公开(公告)号：BR8901084A

    公开(公告)日：1989-10-31

    申请号：BR8901084

    申请日：1989-03-08

    Applicant: HOECHST AG

    Inventor： HACKENBRUCH JOACHIM ,  PAPENFUHS THEODOR ,  WARNING KLAUS ,  SIEGEMUND GUENTER

    IPC: C07B61/00 ,  C07C45/00 ,  C07C45/46 ,  C07C49/813 ,  C07C49/84 ,  C07C67/00 ,  C07C315/04 ,  C07C317/22 ,  C07C317/24 ,  C07C319/20 ,  C07C323/09 ,  C07C323/22 ,  C07F7/08 ,  C07C45/61 ,  C07C47/24

    Abstract: Process for the preparation of halogenated aromatic compounds of the formula … … in which Hal denotes fluorine, chlorine or bromine and… Z denotes an aromatic group,… characterised in that a halobenzene of the formula C6H5Hal (II) is reacted under anhydrous conditions with a bis-acid halide of the formula Hal-CO-Z-CO-Hal (III) in a molar ratio of at least 2:1 in the presence of haloalkanesulphonic acids of the formula Y(CnX2n)SO3H (IV), where in the formulae II and III Hal and Z have the meaning given previously and Y denotes fluorine or hydrogen, X denotes fluorine and/or chlorine and n denotes an integer from 1 to 10, where at least one X stands for fluorine. … The invention further relates to the use of compounds of the formula I, preferably of 1,4-bis(4-fluorobenzoyl)benzene and of 1,4-bis(4-chlorobenzoyl)benzene, in the form of a clear solution in diphenyl sulphone, which has been obtained by treatment with a solid base, preferably Na2CO3, K2CO3 or MgO, for the preparation of polycondensates.

    PROCESS FOR THE PRODUCTION OF HIGH-PURITY TETRACHLORO-1,4-BENZOQUINONE
    157.
    发明专利
    PROCESS FOR THE PRODUCTION OF HIGH-PURITY TETRACHLORO-1,4-BENZOQUINONE 未知

    公开(公告)号：IN165050B

    公开(公告)日：1989-08-05

    申请号：IN42CA1988

    申请日：1988-01-18

    Applicant: HOECHST AG

    Inventor： ARNDT OTTO ,  PAPENFUHS THEODOR

    IPC: C07C37/62 ,  C07C45/00 ,  C07C46/00 ,  C07C46/06 ,  C07C50/24 ,  C07C67/00 ,  C07C50/00

    Abstract: Highly pure tetrachloro-1,4-benzoquinone is prepared by the action of chlorine and hydrochloric acid on hydroquinone, characterised in that the 1.9- to 2.1-fold molar amount of gaseous chlorine is allowed to act, at temperatures from 5 to 15 DEG C, on 1 mole of hydroquinone in the 6- to 7-fold molar amount of 30% to 37% hydrochloric acid, the suspension obtained, which essentially contains the 2,5-dichlorohydroquinone, is then diluted with 2 to 3 parts of water relative to the hydroquinone employed, and first heated to a temperature of 20 to 30 DEG C, the 1.9- to 2.1-fold molar amount of chlorine gas is then passed in in an atmosphere of air and while increasing the temperature to 90 to 100 DEG C, while simultaneously diluting the mixture with 3.5 to 4.5 parts of water, relative to hydroquinone employed, and finally passing in, at temperatures from 100 to 115 DEG C, the 1- to 2-fold molar amount of gaseous chlorine, relative to hydroquinone employed.

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