-
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.
-
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
-
公开(公告)号：DE59106058D1
公开(公告)日：1995-08-24
申请号：DE59106058
申请日：1991-09-25
Applicant: HOECHST AG
Inventor： PAPENFUHS THEODOR , HACKENBRUCH JOACHIM , PFIRMANN RALF DR
IPC: B01J23/02 , C07B61/00 , C07C201/12 , C07C205/26
Abstract: PCT No. PCT/EP91/01829 Sec. 371 Date Mar. 23, 1993 Sec. 102(e) Date Mar. 23, 1993 PCT Filed Sep. 25, 1991 PCT Pub. No. WO92/05141 PCT Pub. Date Apr. 2, 1992.According to a process for producing isomer-free 2,3-difluoro-6-nitrophenol, 2,3,4-trifluoronitrobenzene is reacted with an aqueous solution of alkali metal or alkaline earth metal hydroxide in the absence of organic solvent, at temperatures between about 20 degrees C. and 100 degrees C., the pH value of the reaction mixture is set at about 1 to 6 by acid addition, the resulting product is stream distilled and the 2,3-difluoro-6-nitrophenol is isolated after cooling. No organic solvents are used during any of the steps of the process.
-
公开(公告)号：CA2092407A1
公开(公告)日：1992-03-26
申请号：CA2092407
申请日：1991-09-25
Applicant: HOECHST AG
Inventor： PAPENFUHS THEODOR , HACKENBRUCH JOACHIM , PFIRMANN RALF
IPC: B01J23/02 , C07B61/00 , C07C201/12 , C07C205/26
Abstract: PCT No. PCT/EP91/01829 Sec. 371 Date Mar. 23, 1993 Sec. 102(e) Date Mar. 23, 1993 PCT Filed Sep. 25, 1991 PCT Pub. No. WO92/05141 PCT Pub. Date Apr. 2, 1992.According to a process for producing isomer-free 2,3-difluoro-6-nitrophenol, 2,3,4-trifluoronitrobenzene is reacted with an aqueous solution of alkali metal or alkaline earth metal hydroxide in the absence of organic solvent, at temperatures between about 20 degrees C. and 100 degrees C., the pH value of the reaction mixture is set at about 1 to 6 by acid addition, the resulting product is stream distilled and the 2,3-difluoro-6-nitrophenol is isolated after cooling. No organic solvents are used during any of the steps of the process.
-
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
-
Patent Agency Ranking
公开(公告)号：MX9101754A
公开(公告)日：1992-07-08
申请号：MX9101754
申请日：1991-10-24
Applicant: HOECHST AG
Inventor： SCHACH THOMAS , PAPENFUHS THEODOR , HACKENBRUCH JOACHIM
IPC: B01J23/44 , C07B35/06 , 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
-
公开(公告)号：CA2072084A1
公开(公告)日：1991-05-03
申请号：CA2072084
申请日：1990-10-25
Applicant: HOECHST AG
Inventor： HACKENBRUCH JOACHIM , PAPENFUHS THEODOR , SCHNELLER ARNOLD
Abstract: Process for the preparation of 1,4-bis(4-hydroxyben-zoyl)benzene A process for the preparation of 1,4-bis(4-hydroxyben-zoyl)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 to about 200.degree.C.
-
公开(公告)号：CA2092407C
公开(公告)日：1997-03-18
申请号：CA2092407
申请日：1991-09-25
Applicant: HOECHST AG
Inventor： PAPENFUHS THEODOR , HACKENBRUCH JOACHIM , PFIRMANN RALF
IPC: B01J23/02 , C07B61/00 , C07C201/12 , C07C205/26
Abstract: According to a process for producing isomer-free 2,3-difluor-6-nitrophenol, 2,3,4-trifluornitrobenzol is reacted with an aqueous solution of alkali metal or alkaline earth metal hydroxide in the absence of organic solvent, at temperatures between about 20.degree.C and 100.degree.C, the pH value of the reaction mixture is set at about 1 to 6 by acid addition, the resulting product is steam distilled and the 2,3-difluor-6-nitrophenol is isolated after cooling. No organic solvents are used during any of the steps of the process.
-
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
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.
-
公开(公告)号：IN172004B
公开(公告)日：1993-03-13
申请号：IN204CA1989
申请日：1989-03-13
Applicant: HOECHST AG
Inventor： HACKENBRUCH JOACHIM , PAPENFUHS THEODOR , WARNING KLAUS , SIEGEMUND GUNTER
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 , C07C41/18 , C07C43/263 , C07C49/807 , C07C147/06
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.
-
-
-
-
-
-
-
-
-
Search Results
12
records
(took 0.023 seconds)
