公开(公告)号：US3822311A

公开(公告)日：1974-07-02

申请号：US33925473

申请日：1973-03-08

Applicant: BAYER AG

Inventor： WEDEMEYER K ,  HELM R ,  PAWELLEK D

IPC: C07B61/00 ,  B01J31/00 ,  C07C67/00 ,  C07C201/00 ,  C07C205/58 ,  C07C79/46

CPC classification number: C07C205/58 ,  C07C201/12

Abstract: 2,5-DICHLORO-3-NITRO-BENZOIC ACID IS PRODUCED BY REACTING 5-CHLORO-3-NITRO-SALICYLIC ACID WITH AN EXCESS OF A CHLORINATING AGENT, PREFERABLY AT THE REFLUX TEMPERATURE OF THE MIXTURE, IN THE PRESENCE OF A N,N-DIALKYLCARBOXYLIC ACID AMIDE OR A TERTIARY AMINE AS A CATALYST, AND SPANIFYING, UNDER ACID CONDITIONS, THE ACID CHLORIDE THEREBY PRODUCED, THE YIELD THE DESIRED COMPOUND.