Verfahren zur Herstellung von 3-Alkyl-2,6-dichloracylaniliden durch elektrolytische Debromierung von 3-Alkyl-4-brom-2,6-dichloracylaniliden
申请人:HOECHST AKTIENGESELLSCHAFT
公开号:EP0657417A1
公开(公告)日:1995-06-14
Verfahren zur Herstellung von 3-Alkyl-2,6-dichloracylaniliden der allgemeinen Formel I
worin R¹, R² unabhängig voneinander (C₁-C₄)-Alkyl bedeuten, indem man Bromalkylacylanilide der allgemeinen Formel II
worin R¹, R² die oben angegebene Bedeutung besitzen, elektrolytisch debromiert.
通式 I 的 3-烷基-2,6-二氯酰基苯胺的制备工艺
将通式 II 的溴代烷基乙酰苯胺反应,其中 R¹、R² 相互独立地为 (C₁-C₄)-烷基
其中 R¹、R² 具有上述含义,通过电解脱溴反应。
Process for the preparation of 2,6-dichloro-4-bromoanilides
申请人:DOWELANCO
公开号:EP0727412A2
公开(公告)日:1996-08-21
The present invention is directed to a process for preparing a 2,6-dichloro-4-bromoanilide which is characterized by reacting a 4-bromoanilide with from 1.8 to 2.5 equivalents of chlorine in a solvent consisting of from 3:1 to 100:1 parts of an alkanoic acid per part of water in the presence of from 0.5 to 2.0 equivalents of alkali metal bicarbonate at a temperature between 40°C and the freezing point of the mixture.
Process for the preparation of 2-chloro and 2,6-dichloroanilines
申请人:DowElanco
公开号:US05068392A1
公开(公告)日:1991-11-26
2-Chloro and 2,6-dichloroanilines, optionally substituted in the 3-, 5-, and/or 6-position are prepared from the corresponding anilides by selective bromination, chlorination, reduction and hydrolysis. The selectivity of the process for introducing chlorines ortho to the amino group is very high.