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公开(公告)号：CA2117735A1
公开(公告)日：1995-04-09
申请号：CA2117735
申请日：1994-10-07
Applicant: HOECHST AG
Inventor： NEUBER MARITA , LEUPOLD ERNST I , LITTERER HEINZ , BARTELS GUENTER , KANSCHIK-CONRADSEN ANDREAS
Abstract: of the disclosure: Process for preparing 1-bromo-3,5-difluorobenzene Process for preparing 1-bromo-3,5-difluorobenzene, which comprises isomerizing 1-bromo-2,4-difluorobenzene or a mixture of 1-bromo-2,4-difluorobenzene and 1-bromo-2,6-difluorobenzene over acid zeolites of the pentasil type.
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公开(公告)号：HUT44772A
公开(公告)日：1988-04-28
申请号：HU432986
申请日：1986-10-17
Applicant: HOECHST AG
Inventor： BARTELS GUENTER
IPC: C07D319/06 , C07D309/06
Abstract: The invention relates to a process for preparing the ketals of 4-bromobutanal and of 5-bromopentanal of the formula which comprises reacting 2,3-dihydroguran and 3,4-dihydro-2H-pyran respectively in a solvent in the presence of a catalyst with neopentylglycol and then brominating the resulting product. The invention also relates to the said ketal of 5-bromobutanal as such.
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公开(公告)号：CA1304400C
公开(公告)日：1992-06-30
申请号：CA534405
申请日：1987-04-10
Applicant: HOECHST AG
Inventor： KLEINER HANS-JERG , BARTELS GUENTER
Abstract: HOE 86/F 076 A process for the production of .alpha.-aminoalkylphosphonic acids or salts thereof of the formula A (A) wherein R1 represents hydrogen, alkyl having from 1 to 4 carbon atoms or CH2-C6H5 and X hydrogen or a metal cation, which comprises reacting a compound of the formula B (B) in which R1 has the same meaning as in formula A and MP? represents hydrogen or a p-valent metal cation, with a hypohalite of a p-valent metal cation, and isolating the metal salt produced or acidifying the reaction mixture obtained to produce the .alpha.-aminoalkyl-phosphonic acid.
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公开(公告)号：CA1261347A
公开(公告)日：1989-09-26
申请号：CA497410
申请日：1985-12-11
Applicant: HOECHST AG
Inventor： BARTELS GUENTER
Abstract: : .alpha. -Aminoalkylphosphonic and .alpha.-aminoalkylphosphinic acids of the formula I (I) uhere n = 1 or 0, R1 = H, CH3 or CH2-C6H5 R2 = H (for n = 1) and also = alkyl or phenyl (for n = O) are prepared by Hofmann degradation from compounds of the formula II (II) where n and R1 have the same meaning as in formula I, R3 = alkyl (for n = 1), alkyl or phenyl (for n = 0), and Mp+ = p-valent cation, with subsequent working up in the known manner. Some of the compounds I are biologically active, and some are intermediates for the preparation of biologically active compounds.
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公开(公告)号：HUT46701A
公开(公告)日：1988-11-28
申请号：HU158487
申请日：1987-04-09
Applicant: HOECHST AG
Inventor： KLEINER HANS-JERB , BARTELS GUENTER
Abstract: alpha -Aminoalkylphosphonic acids or salts thereof of the formula A … … in which R is H, alkyl having 1-4 C atoms or CH2-C6H5 and X is H or a metal cation, are prepared by treating compounds of the formula B … … in which R has the same meaning as in formula A and M denotes hydrogen or a p-valent metal cation, with a hypohalite of a p-valent metal cation and isolating the metal salt formed or acidifying the reaction mixture obtained for preparing alpha -aminoalkylphosphonic acid. … Some of the compounds A are biologically active and some are intermediates for preparing biologically active compounds and also other compounds.
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Patent Agency Ranking
公开(公告)号：ZA8702591B
公开(公告)日：1987-11-25
申请号：ZA8702591
申请日：1987-04-10
Applicant: HOECHST AG
Inventor： KLEINER HANS-JERG , HANS-JERG KLEINER , BARTELS GUENTER , GUENTER BARTELS
CPC classification number: C07F9/3808
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7.发明专利
公开(公告)号：ZA859481B
公开(公告)日：1986-08-27
申请号：ZA859481
申请日：1985-12-11
Applicant: HOECHST AG
Inventor： BARTELS GUENTER
Abstract: 1. A process for the preparation of alpha-aminoalkylphosphonic and of alpha-aminoalkylphosphinic acids of the formula I see diagramm : EP0184753,P10,F1 where n = 1 or 0, R1 = H, CH3 or CH2 -C6 H5 , and R2 = H (for n = 1) and also = alkyl or phenyl (for n = 0), wherein compounds of the formula II see diagramm : EP0184753,P10,F2 where n and R1 have the same meaning as in formula I, R3 = alkyl (for n = 1), alkyl or phenyl (for n = 0), and M**p+ = p-valent cation, are subjected to a Hofmann degradation and the compounds of the formula I are obtained in the known manner.
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8.发明专利
公开(公告)号：ZA8509481B
公开(公告)日：1986-08-27
申请号：ZA8509481
申请日：1985-12-11
Applicant: HOECHST AG
Inventor： BARTELS GUENTER
CPC classification number: C07F9/301 , C07F9/3808
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9.发明专利
公开(公告)号：CA2117736A1
公开(公告)日：1995-04-09
申请号：CA2117736
申请日：1994-10-07
Applicant: HOECHST AG
Inventor： RAPP JOCHEN , PLANKER SIEGFRIED , PAPENFUHS THEODOR , BARTELS GUENTER
IPC: B01J27/045 , C07B61/00 , C07C227/04 , C07C227/06 , C07C227/08 , C07C229/56
Abstract: The present invention relates to a process for the preparation of 5-fluoroanthranilic alkyl esters and/or 5-fluoroanthranilic acid, which comprises dissolving a 3-fluorobenzoic alkyl ester in sulfuric acid and reacting the solution with nitrating acid at from -10 to 30.degree.C, then adding water, separating off the nitrated reaction product and reacting it with hydrogen at from 50 to 120.degree.C under elevated pressure in the presence of a catalyst comprising a metal of the platinum group and sulfur, and, if desired, removing 5-fluoroanthranilic alkyl esters by distillation and hydrolyzing them to give 5-fluoro-anthranilic acid.
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公开(公告)号：ZA872591B
公开(公告)日：1987-11-25
申请号：ZA872591
申请日：1987-04-10
Applicant: HOECHST AG
Inventor： KLEINER HANS-JERG , HANS-JERG KLEINER , BARTELS GUENTER , GUENTER BARTELS
Abstract: alpha -Aminoalkylphosphonic acids or salts thereof of the formula A … … in which R is H, alkyl having 1-4 C atoms or CH2-C6H5 and X is H or a metal cation, are prepared by treating compounds of the formula B … … in which R has the same meaning as in formula A and M denotes hydrogen or a p-valent metal cation, with a hypohalite of a p-valent metal cation and isolating the metal salt formed or acidifying the reaction mixture obtained for preparing alpha -aminoalkylphosphonic acid. … Some of the compounds A are biologically active and some are intermediates for preparing biologically active compounds and also other compounds.
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