公开(公告)号：IN182592B

公开(公告)日：1999-05-15

申请号：IN493CA1994

申请日：1994-06-27

Applicant: HOECHST AG

Inventor： SCHACH THOMAS ,  PAPENFUHS THEODOR

IPC: B01J31/02 ,  C07C19/12 ,  C07C79/10

公开(公告)号：CA2191652A1

公开(公告)日：1997-06-02

申请号：CA2191652

申请日：1996-11-29

Applicant: HOECHST AG

Inventor： NEUBER MARITA ,  SCHACH THOMAS ,  PAPENFUHS THEODOR ,  PFIRMANN RALF ,  ROSCHER GUENTER

IPC: B01J27/122 ,  C07B61/00 ,  C07C17/093 ,  C07C17/35 ,  C07C25/13

Abstract: The invention relates to a process for preparing 1-bromo-3,5-difluorobenzene, which comprises converting 3,5-difluoroaniline into its diazonium salt and then reacting the diazonium salt with HBr in the presence of CuBr.

公开(公告)号：ZA938576B

公开(公告)日：1995-01-17

申请号：ZA938576

申请日：1993-11-17

Applicant: HOECHST AG

Inventor： SCHACH THOMAS ,  PAPENFUHS THEODOR

IPC: B01J23/44 ,  C07B39/00 ,  C07B61/00 ,  C07C17/00 ,  C07C17/23 ,  C07C25/13 ,  C07D213/61 ,  C07C

Abstract: 1,3-Difluorobenzene is prepared by catalytic elimination of halogen from a 1,3-difluorohalobenzene by reacting a 1,3-difluorohalobenzene of the formula (1) in which R to R denote H, Cl or Br and at least one of the radicals R to R stands for Cl or Br, in the presence of a palladium catalyst and of an amine, if appropriate in the presence of water or of an organic solvent which is inert to the reactants and the reaction conditions, with hydrogen under pressure and at temperatures from about 70@ to about 140@C.

公开(公告)号：IN172469B

公开(公告)日：1993-08-14

申请号：IN755CA1991

申请日：1991-10-07

Applicant: HOECHST AG

Inventor： SCHACH THOMAS ,  PAPENFUHS THEODOR ,  HACKENBRUCH JOACHIM

IPC: B01J23/44 ,  C07B37/04 ,  C07B61/00 ,  C07C1/26 ,  C07C15/14 ,  C07C15/24 ,  C07C17/26 ,  C07C25/18 ,  C07C25/22 ,  C07C41/30 ,  C07C43/20 ,  C07C43/205 ,  C07C315/04 ,  C07C317/14 ,  C07B37/00 ,  C07C15/00 ,  C07C17/00 ,  C07C19/02 ,  C07C19/08

公开(公告)号：IN181355B

公开(公告)日：1998-05-30

申请号：IN483CA1994

申请日：1994-06-24

Applicant: HOECHST AG

Inventor： SCHACH THOMAS ,  PAPENFUHS THEODOR

IPC: C07B39/00 ,  C07C79/12

公开(公告)号：CA2142247A1

公开(公告)日：1995-08-12

申请号：CA2142247

申请日：1995-02-10

Applicant: HOECHST AG

Inventor： SCHACH THOMAS ,  PAPENFUHS THEODOR

IPC: B01J23/44 ,  C07B61/00 ,  C07C17/23 ,  C07C25/13 ,  C07C43/225 ,  C07C45/65 ,  C07C47/55 ,  C07C47/56 ,  C07C47/575 ,  C07C209/74 ,  C07C211/56 ,  C07C211/59 ,  C07C255/50 ,  C07D213/61 ,  C07C25/00 ,  C07C41/24 ,  C07C49/807 ,  C07C211/52 ,  C07C253/30 ,  C07C255/49

Abstract: The invention relates to a process for the preparation of aromatic fluoro compounds of the formula I FnArR1R2R3 (I) in which Ar is phenyl, naphthyl or pyridyl, R1, R2 and R3 independently of one another are hydrogen, halogen, (C1-C4)-alkyl, phenyl, NR2, OR, CN, CHO or COR, where R is hydrogen or (C1-C6)-alkyl, and n = 1, 2, 3, 4 or 5, which comprises reacting aromatic fluoro compounds of the formula II XmFnArR1R2R3 (II) in which Ar, R1, R2, R3 and n have the abovementioned meaning, each X is a chlorine or bromine atom and m = 1, 2, 3, 4 or 5, with hydrogen in the presence of a palladium catalyst, a water-insoluble amine which also does not form water-soluble hydrohalides, and if desired an inert solvent.

公开(公告)号：CA2142248A1

公开(公告)日：1995-08-12

申请号：CA2142248

申请日：1995-02-10

Applicant: HOECHST AG

Inventor： SCHACH THOMAS ,  PAPENFUHS THEODOR

IPC: C07D213/73 ,  B01J23/44 ,  C07B61/00 ,  C07C209/36 ,  C07C209/74 ,  C07C211/52 ,  C07C211/59 ,  C07C213/00 ,  C07C221/00 ,  C07C223/06 ,  C07C225/22 ,  C07C253/30 ,  C07C255/58 ,  C07C215/74 ,  C07C217/78

Abstract: The invention relates to a process for preparing fluoroanilines of the formula (I) FnArNH2 (I) in which n is 1, 2, 3 or 4, Ar is phenyl, naphthyl or pyridyl, and the remaining substituents on the Ar radical are identical or different and are, independently of each other, hydrogen, halogen, (C1-C4)-alkyl, phenyl, NR2, OR, CN, CHO, or COR, where R is hydrogen or (C1-C6)-alkyl, wherein fluoronitrobenzenes of the formula (II) XmFnArNO2 (II) in which n, Ar and the remaining substituents on the Ar radical have the abovementioned meaning, X is chlorine or bromine and m is 1, 2, 3 or 4, are reacted with hydrogen in the presence of a palladium catalyst, of an amine which is not soluble in water and which also does not form watersoluble hydrohalides, and, where appropriate, of an inert solvent.

公开(公告)号：IN175200B

公开(公告)日：1995-05-20

申请号：IN676CA1993

申请日：1993-11-08

Applicant: HOECHST AG

Inventor： SCHACH THOMAS ,  PAPENFUHS THEDOR

IPC: C01C25/13

公开(公告)号：CA2128469A1

公开(公告)日：1995-01-22

申请号：CA2128469

申请日：1994-07-20

Applicant: HOECHST AG

Inventor： SCHACH THOMAS ,  PAPENFUHS THEODOR

IPC: B01J31/02 ,  C07B61/00 ,  C07C201/12 ,  C07C205/12 ,  C07C205/11

Abstract: Process for preparing multiply fluorinated nitrobenzenes Multiply, preferably doubly or triply, fluorinated nitrobenzenes are prepared in an advantageous way from the corresponding chloronitrobenzenes and an alkali metal fluoride in a chlorine-fluorine exchange reaction by catalyzing the reaction with a quaternary ammonium compound comprising at least one alkoxypolyoxyalkyl radical.

公开(公告)号：CA2128465A1

公开(公告)日：1995-01-22

申请号：CA2128465

申请日：1994-07-20

Applicant: HOECHST AG

Inventor： SCHACH THOMAS ,  PAPENFUHS THEODOR ,  PFIRMANN RALF

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

Abstract: Process for preparing fluorobenzonitriles Fluorobenzonitriles and chlorofluorobenzonitriles are prepared in an advantageous manner from the corresponding chlorobenzonitriles and an alkali metal fluoride in a chlorine-fluorine exchange reaction, by catalyzing the reaction with a quaternary ammonium compound comprising at least one alkoxypolyoxyalkyl radical.