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公开(公告)号：CA2094802A1
公开(公告)日：1992-04-27
申请号：CA2094802
申请日：1991-10-16
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 , C07C45/72 , C07C49/782 , C07C317/32
Abstract: - 14 - HOE 90/F 322 Process for the preparation of biaryls Process for the preparation of biaryls of the formula (1) R1m - Ar - Ar - R1m (1) wherein Ar is a phenylene or naphthylene radical, R1 is a hydrogen, fluorine or chlorine atom or an unbranched or branched alkyl(C1-C6)-, alkyl(C1-C6)-O-, alkyl(C1-C6)-CO- or alkyl(C1-C6)-SO2H radical and m is the number of still unsubstituted =C- positions on the Ar radical, in which a compound of the formula (2) R1m - Ar - X (2) wherein Ar, R1 and m have the meanings cited above and X is a chlorine or bromine atom, is dehalogenated and dimerized in the presence of a palladium catalyst on a support material, of a reducing agent, a hydrogen halide acceptor, a polyether or polyether mixture and of water at temperatures of about 50 to about 120.degree.C.
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公开(公告)号：CA2148862A1
公开(公告)日：1995-11-10
申请号：CA2148862
申请日：1995-05-08
Applicant: HOECHST AG
Inventor： PFIRMANN RALF , SCHACH THOMAS
IPC: C07C17/093 , C07C25/13 , C07C201/08 , C07C205/12 , C07C209/36 , C07C211/52 , C07C253/00 , C07C255/50 , C07C51/08 , C07D215/48 , C07C63/70
Abstract: The present invention relates to substituted 2-chloro-3,4,5-trifluorobenzenes of the formula , in which R is NO2, NH2, CN or Cl, and to a process for the preparation of substituted 2-chloro-3,4,5-trifluoro-benzenes of the formula given above, in which R is NO2, NH2, CN, Cl or Br, which involves reacting 2,3,4-tri-fluorochlorobenzene with a nitrating agent in the presence or absence of a water-insoluble solvent at from -10 to 50.degree.C, reducing 2-chloro-3,4,5-trifluoronitro-benzene or a mixture which contains 2-chloro-3,4,5-trifluoronitrobenzene and 5-chloro-2,3,4-trifluoronitro-benzene, in the presence of an organic solvent, isolating 2-chloro-3,4,5-trifluoroaniline or a mixture which contains 2-chloro-3,4,5-trifluoroaniline and 5-chloro-2,3,4-trifluoroaniline, diazotizing this product, if desired, and exchanging the diazotized group for a chloride atom, bromide atom or cyanide radical.
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公开(公告)号：CA2128467A1
公开(公告)日：1995-01-22
申请号：CA2128467
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 fluoronitrobenzenes Fluoronitrobenzenes are prepared in an advantageous way from the corresponding chloronitrobenzenes and an alkali metal fluoride by means of a chlorine-fluorine exchange reaction with replacement of a chlorine atom by a fluorine atom, by catalyzing the reaction with a quaternary ammonium compound which comprises at least one alkoxypolyoxyalkyl radical.
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公开(公告)号：CA2128466A1
公开(公告)日：1995-01-22
申请号：CA2128466
申请日：1994-07-20
Applicant: HOECHST AG
Inventor： SCHACH THOMAS , PAPENFUHS THEODOR
IPC: B01J31/02 , C07B37/04 , C07B61/00 , C07C201/12 , C07C205/12 , C07C205/26 , C07C253/14 , C07C253/30 , C07C255/50
Abstract: : Catalyst for nucleophilic aromatic substitutions A catalyst consisting essentially of a quaternary ammonium compound, comprising at least one linear or branched alkoxypolyoxyalkyl chain, and a quaternary ammonium or phosphonium salt or a polyether, or a mixture of each of the specified compounds, is suitable for accelerating, or making possible for the first time, many nucleophilic aromatic substitutions.
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公开(公告)号：ZA9308576B
公开(公告)日：1995-01-17
申请号：ZA9308576
申请日：1993-11-17
Applicant: HOECHST AG
Inventor： SCHACH THOMAS , PAPENFUHS THEODOR
CPC classification number: C07D213/61 , C07B39/00 , C07C17/23 , C07C25/13
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Patent Agency Ranking
公开(公告)号：CA2061489A1
公开(公告)日：1992-08-21
申请号：CA2061489
申请日：1992-02-19
Applicant: HOECHST AG
Inventor： SCHACH THOMAS , PAPENFUHS THEODOR
IPC: C07C253/00 , C07C253/14 , C07C255/50
Abstract: HOE 91/F 055 Process for the preparation of 2,4 dichloro-5-fluoro-benzonitrile Process for the preparation of 2,4-dichloro-5-fluoro-benzonitrile, by reacting 5-bromo-2,4-dichlorofluoro-benzene with about 10 to about 300 mol % of copper(I) cyanide in the presence of about 10 to about 2,000 mol % of a polar aprotic solvent at temperatures from about 100 to about 250.degree.C to give 2,4-dichloro-5-fluorobenzonitrile.
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公开(公告)号：IN181657B
公开(公告)日：1998-08-15
申请号：IN494CA1994
申请日：1994-06-27
Applicant: HOECHST AG
Inventor： SCHACH THOMAS , PAPENFUHS THEODOR , PFIRMANN RALF
IPC: C07B39/00 , C07C121/52
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公开(公告)号：IN179199B
公开(公告)日：1997-09-13
申请号：IN485CA1994
申请日：1994-06-24
Applicant: HOECHST AG
Inventor： SCHACH THOMAS , PAPENFUHS THEODOR
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公开(公告)号：DE59106559D1
公开(公告)日：1995-10-26
申请号：DE59106559
申请日：1991-10-16
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
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公开(公告)号：CA2103303A1
公开(公告)日：1994-05-19
申请号：CA2103303
申请日：1993-11-17
Applicant: HOECHST AG
Inventor： SCHACH THOMAS , PAPENFUHS THEODOR
Abstract: of the disclosure Process for preparing 1,3-difluorobenzene Process for preparing 1,3-difluorobenzene by means of the catalytic elimination of halogen from a 1,3-difluorohalo-benzene, by reacting a 1,3-difluorohalobenzene of the formula (1) (1) in which R1 to R4 are H, Cl or Br, and at least one of the radicals R1 to R4 is Cl or Br, in the presence of a palladium catalyst and of an amine, where appropriate in the presence of water or of an organic solvent which is inert towards the reactants and the reaction conditions, with hydrogen under pressure and at temperatures from about 70.degree. to about 140.degree.C.
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