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    NEW DERIVATIVE OF 2,3,6-TRIFLUOROPHENOL AND PRODUCTION OF THE SAME
    1.
    发明专利
    NEW DERIVATIVE OF 2,3,6-TRIFLUOROPHENOL AND PRODUCTION OF THE SAME 失效

    公开(公告)号：JPH09183745A

    公开(公告)日：1997-07-15

    申请号：JP33242996

    申请日：1996-12-12

    Applicant: HOECHST AG

    Inventor： PFIRMANN RALF ,  WINGEN RAINERN

    IPC: B01J23/72 ,  C07B61/00 ,  C07C37/00 ,  C07C37/62 ,  C07C39/24 ,  C07C39/26 ,  C07C39/27 ,  C07C41/18 ,  C07C43/225

    Abstract: 2,3,6-Trifluorophenol derivatives and ethers of formula (I) are new; in which R = hydrogen (H), 1-6 carbon (C) (fluoro)alkyl, benzyl or benzyl substituted by 1-4 C alkyl, 1-4 C alkoxy or halogen; X = H, chlorine (Cl), bromine (Br) or iodine (I); and X not = R. (I) are prepared by (i) decarboxylating a (di)carboxylic acid of formula (II) in basic solvent(s) in the presence of a decarboxylation catalyst at 120-220 degrees C; (ii) optionally acidifying the reaction mixture; (iii) separating the decarboxylated product; (iv) optionally introducing the group X = Cl, Br or I by halogenation; and (v) optionally introducing R by etherification if R not = H; in which R' = H and R not = H or especially R' = R; n = 2 or especially 1.

    PROCESS FOR THE PREPARATION OF ESTERS OF AROMATIC CARBOXYLIC ACIDS
    3.
    发明专利
    PROCESS FOR THE PREPARATION OF ESTERS OF AROMATIC CARBOXYLIC ACIDS 未知

    公开(公告)号：CA2182350A1

    公开(公告)日：1997-02-01

    申请号：CA2182350

    申请日：1996-07-30

    Applicant: HOECHST AG

    Inventor： PFIRMANN RALF ,  PAPENFUHS THEODOR

    IPC: B01J31/02 ,  C07B61/00 ,  C07C67/00 ,  C07C67/11 ,  C07C67/28 ,  C07C69/76 ,  C07C69/78 ,  C07C69/84 ,  C07C69/92 ,  C07C227/18 ,  C07C229/52 ,  C07C319/20 ,  C07C323/62

    Abstract: Process for the preparation of esters of aromatic carboxylic acids The present invention relates to a process for the preparation of compounds of the formula (1) R1R2R3R4R5ArCOOR (1) in which R1, R2, R3, R4 and R5 are identical or different and are hydrogen, a halogen, an alkyl or alkoxy group having 1 to 6 carbon atoms, OR, NHR, NR2, SR or COOR, R being an alkyl radical having 1 to 4 carbon atoms, Ar is an aryl radical having 6 to 12 carbon atoms and the radical R identified in formula (1) has the above meaning, by reacting a compound of the formula (2) R1R2R3R4R5ArCOOH (2) in which R1, R2, R3, R4 and R5 are identical or different and are hydrogen, a halogen, an alkyl or alkoxy group having 1 to 6 carbon atoms, OH, NH2, NHR, SH or COOH and Ar has the same meaning as in formula (1), with a sulfate of the formula (RO)2SO2, in which R has the above meaning, at a pH from 5 to 12 in the presence of a water-insoluble tertiary amine and water at a temperature from 10 to 120.degree.C in the presence or absence of a water-insoluble solvent and with addition of a base.

    2,4,5-TRIHALOCINNAMONITRILES AND PROCESS FOR THEIR PREPARATION
    6.
    发明专利
    2,4,5-TRIHALOCINNAMONITRILES AND PROCESS FOR THEIR PREPARATION 未知

    公开(公告)号：CA2133374A1

    公开(公告)日：1995-04-03

    申请号：CA2133374

    申请日：1994-09-30

    Applicant: HOECHST AG

    Inventor： BELLER MATTHIAS ,  FISCHER HARTMUT ,  FORSTINGER KLAUS ,  PFIRMANN RALF ,  STRUTZ HEINZ

    IPC: B01J27/13 ,  B01J31/24 ,  C07B61/00 ,  C07C253/30 ,  C07C255/35 ,  C07C255/37 ,  C07C255/32

    Abstract: 2,4,5-Trihalocinnamonitriles and process for their preparation 2,4,Trihalocinnamonitriles of the formula I (I) wherein R1 is hydrogen, straight-chain or branched C1-C12 alkyl, fluoro, chloro or phenyl, the phenyl radical being unsubstituted or substituted, if desired, with C1-C4 alkyl or C1-C2 alkoxy, and X, Y and Z are identical or different and are fluoro, chloro or bromo. Furthermore, a process for the preparation of the compounds of the formula I by reacting a compound of the formula (II) (II) in which R1 is as defined above with a compound of the formula III (III) in which X, Y and Z are as defined above and A is iodo, bromo or chloro, in the presence of a palladium catalyst, a base and, if desired, a solvent and/or stabilizing ligand and/or ammonium salts, at temperatures of 80-200.degree.C.

    PROCESS FOR THE PREPARATION OF TETRAFLUOROPHTHALIC ACID AND/OR TETRAFLUOROPHTHALIC ANHYDRIDE
    7.
    发明专利
    PROCESS FOR THE PREPARATION OF TETRAFLUOROPHTHALIC ACID AND/OR TETRAFLUOROPHTHALIC ANHYDRIDE 未知

    公开(公告)号：CA2100198A1

    公开(公告)日：1994-01-11

    申请号：CA2100198

    申请日：1993-07-09

    Applicant: HOECHST AG

    Inventor： PFIRMANN RALF ,  PAPENFUHS THEODOR

    IPC: C07C51/06 ,  C07C51/00 ,  C07C51/083 ,  C07C51/38 ,  C07C51/54 ,  C07C63/68 ,  C07C63/70 ,  C07C63/72 ,  C07D209/48 ,  C07D307/89

    Abstract: HOE 92/F 209 of the disclosure: Process for the preparation of tetrafluorophthalic acid and/or tetrafluorophthalic anhydride The present invention relates to a process for the preparation of tetrafluorophthalic acid and/or tetrafluorophthalic anhydride by reacting a compound of the formula in which X is a radical which is optionally mono- or polysubstituted on the aromatic nucleus by fluorine and/or chlorine and/or alkyl groups having 1 to 4 carbon atoms, or is a radical in which R1 and R2 are identical or different and are a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, an alkyl-CO- group having 1 to 6 carbon atoms in the alkyl radical or an aryl group or aryl-CO- group which is optionally mono- or polysubstituted on the aromatic nucleus by fluorine andtor chlorine and/or alkyl groups having 1 to 4 carbon atoms, or R1 and R2 together form a radical of the formula in which R3 is a hydrogen atom, a chlorine atom or a fluorine atom, with water, and subsequently removing the water still present by azeotropic distillation or extracting the tetrafluorophthalic acid and/or its anhydride with a water-insoluble solvent or solvent mixture.

    PROCESS FOR THE PREPARATION OF 2,4,5-TRIFLUOROBENZONITRILE
    8.
    发明专利
    PROCESS FOR THE PREPARATION OF 2,4,5-TRIFLUOROBENZONITRILE 未知

    公开(公告)号：CA2090768A1

    公开(公告)日：1993-08-27

    申请号：CA2090768

    申请日：1993-02-25

    Applicant: HOECHST AG

    Inventor： PFIRMANN RALF ,  PAPENFUHS THEODOR

    IPC: B01J31/02 ,  C07B61/00 ,  C07C253/30 ,  C07C255/50

    Abstract: HOE 92/F 051 of the disclosure: Process for the preparation of 2,4,5-trifluorobenzo-nitrile The present invention relates to a process for the preparation of 2,4,5-trifluorobenzonitrile in which 2,4dichloro-5-fluorobenzonitrile is reacted with approximately 100 to approximately 300 mol % of an alkali metal fluoride or of a tetraalkyl(C1-C18)ammonium fluoride or mixtures of such fluorides per chlorine atom to be exchanged, at temperatures from approximately 80 to approximately 250.degree.C, in the presence of a phase transfer catalyst, if appropriate in a dipolar aprotic solvent.

    N'-SUBSTITUTED N-AMINO-3,4,5,6,-TETRAFLUOROPHTHALIMIDES, ANDPROCESSES FOR THEIR PREPARATION
    10.
    发明专利
    N'-SUBSTITUTED N-AMINO-3,4,5,6,-TETRAFLUOROPHTHALIMIDES, ANDPROCESSES FOR THEIR PREPARATION 未知

    公开(公告)号：CA2067074A1

    公开(公告)日：1992-10-26

    申请号：CA2067074

    申请日：1992-04-24

    Applicant: HOECHST AG

    Inventor： PAPENFUHS THEODOR ,  PFIRMANN RALF

    IPC: C07C63/68 ,  C07C63/70 ,  C07D209/48 ,  C07C51/00

    Abstract: N'-substituted N-amino-3,4,5,6-tetrafluorophthalimides, and processes for their preparation Compounds of the formula (see figure I) in which X is the radical (see figure II) where R1 and R2 are in each case a hydrogen atom, an alkyl-(C1-C10) group, aryl group, alkyl(C1-C6)-CO group or aryl-CO group, where the aryl or aryl-CO group in the case of R1 and R2 can 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 radical which can be substituted on the aromatic ring by 4 chlorine atoms or 4 fluorine atoms, or where X is the radical (see figure III) which can be substituted on the aromatic ring by fluorine and/or chlorine atoms and/or alkyl(C1-C4) groups, and processes for their preparation.

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