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    Process for preparation of 4-alkylsulfonyl-1-alkyl-2-chlorobenzenes and similar compounds
    141.
    发明专利
    Process for preparation of 4-alkylsulfonyl-1-alkyl-2-chlorobenzenes and similar compounds 未知

    公开(公告)号：AU657515B2

    公开(公告)日：1995-03-16

    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).

    145.
    发明专利
    未知

    公开(公告)号：DE59007399D1

    公开(公告)日：1994-11-10

    申请号：DE59007399

    申请日：1990-06-25

    Applicant: HOECHST AG

    Inventor： HACKENBRUCH JOACHIM ,  PAPENFUHS THEODOR

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

    Abstract: PCT No. PCT/EP90/01002 Sec. 371 Date Feb. 24, 1992 Sec. 102(e) Date Feb. 24, 1992 PCT Filed Jun. 25, 1990 PCT Pub. No. WO90/00256 PCT Pub. Date Jan. 10, 1991.A process for the preparation of 1,4-bis(4-hydroxybenzoyl)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 or 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 DEG C. to about 250 DEG C., if appropriate in the presence of a phase transfer catalyst.

    146.
    发明专利
    未知

    公开(公告)号：DE59007162D1

    公开(公告)日：1994-10-20

    申请号：DE59007162

    申请日：1990-10-25

    Applicant: HOECHST AG

    Inventor： HACKENBRUCH JOACHIM DR ,  PAPENFUHS THEODOR ,  SCHNELLER ARNOLD

    IPC: B01J31/02 ,  C07B61/00 ,  C07C45/54 ,  C07C49/83

    Abstract: PCT No. PCT/EP90/01809 Sec. 371 Date Apr. 29, 1992 Sec. 102(e) Date Apr. 29, 1992 PCT Filed Oct. 25, 1990 PCT Pub. No. WO91/06524 PCT Pub. Date May 16, 1991.A process for the preparation of 1,4-bis(4-hydroxybenzoyl)benzene of the formula (I) (I) by rearranging diphenyl terephthalate of the formula (II) (II) in about 3 to about 50 parts, relative to the diphenyl terephthalate, of an anhydrous organic solvent which is inert to the reactants, in the presence of about 30 to about 500 mol-% of a haloalkanesulfonic acid (catalyst) of the general formula (III) or (IV) Y(CnX2n)SO3H (III) Y(CnF2n)SO3H (IV) in which Y is a fluorine or hydrogen atom, and X is a fluorine and/or chlorine atom, with the proviso that at least one X is a fluorine atom, and n is an integer from 1 to 10, at temperatures of about 10 DEG to about 200 DEG C.

    2,3,4-TRIFLUORO-N-ETHYLANILINE AND PROCESSES FOR ITS PREPARATION
    147.
    发明专利
    2,3,4-TRIFLUORO-N-ETHYLANILINE AND PROCESSES FOR ITS PREPARATION 未知

    公开(公告)号：CA2111714A1

    公开(公告)日：1994-06-19

    申请号：CA2111714

    申请日：1993-12-17

    Applicant: HOECHST AG

    Inventor： PAPENFUHS THEODOR ,  PLANKER SIEGFRIED

    IPC: B01J23/40 ,  C07B61/00 ,  C07C209/26 ,  C07C209/36 ,  C07C211/52

    Abstract: of the disclosure 2,3,4-Trifluoro-N-ethylaniline and process for the preparation thereof The present invention relates to the compound 2,3,4-tri-fluoro-N-ethylaniline and to a process for the preparation thereof. 2,3,4-Trifluoro-N-ethylaniline is prepared by reducing 1 mol of 2,3,4-trifluoronitrobenzene with hydrogen in an organic solvent which is inert towards the reactants and under the reaction conditions as diluent in the presence of a modified nickel or noble metal catalyst and a buffer material at temperatures of from about 80.degree.C to about 120.degree.C at pH values of from about 7 to 10 at atmospheric pressure or increased pressure to form 2,3,4-trifluoro-aniline and subsequently subjecting this, through addition of from 1 to about 1.5 mol of acetaldehyde, based on the 2,3,4-trifluoroaniline formed, with or without an inert organic solvent as diluent, to reductive alkylation with hydrogen at temperatures of from about 40.degree.C to about 100.degree.C.

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