公开(公告)号：CA2117736C

公开(公告)日：2005-08-16

申请号：CA2117736

申请日：1994-10-07

Applicant: HOECHST AG

Inventor： RAPP JOCHEN ,  PLANKER SIEGFRIED ,  PAPENFUHS THEODOR ,  BARTELS GUNTER

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 acids 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.

公开(公告)号：BR8506195A

公开(公告)日：1986-08-26

申请号：BR8506195

申请日：1985-12-11

Applicant: HOECHST AG

Inventor： BARTELS GUNTER

IPC: A01N57/18 ,  C07F9/30 ,  C07F9/32 ,  C07F9/38 ,  C07F9/40

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.