Process and intermediates for the preparation of 2,6-difluoroaniline
申请人:DowElanco
公开号:US05041674A1
公开(公告)日:1991-08-20
1-Chloro-3,5-difluorobenzene is chlorinated to give 4,6-difluoro-1,2,3-trichlorobenzene which in turn is nitrated and reduced to the corresponding novel aniline, 2,6-difluoro-3,4,5-trichloroaniline. Further reduction of this aniline provides 2,6-difluoroaniline with high selectivity.
A process for the preparation of 2,6-difluoroaniline from 1,2,3-trichlorobenzene
申请人:DOWELANCO
公开号:EP0506199B1
公开(公告)日:1994-12-14
US5041674A
申请人:——
公开号:US5041674A
公开(公告)日:1991-08-20
Aromatic fluorine chemistry. Part 4. Preparation of 2.6-difluoroaniline
作者:R.G. Pews、J.A. Gall
DOI:10.1016/s0022-1139(00)80345-0
日期:1991.5
1-Chloro-3,5-difluorobenzene prepared via KF exchange on 1,3,5-trichlorobenzene is dichlorinated and nitrated in a single reactor to a mixture of trichlorodifluoronitrobenzenes. The latter are reduced to ∼4:1 isomeric mixture of 2,6-difluoroaniline and 2,4-difluoroaniline.