公开(公告)号：BR7602623A

公开(公告)日：1976-11-23

申请号：BR7602623

申请日：1976-04-28

Applicant: HOECHST AG

Inventor： PASZTHORY E ,  ZIMMERMANN V ,  HILLE E ,  SEIFERT K

IPC: C07C235/80 ,  C07C67/00 ,  C07C231/00 ,  C07C231/04 ,  C07C233/16 ,  C07C103/30

Abstract: N-acetoacetyl-2,5-dimethoxy-4-chloroanilide is obtained in high yield and purity by suspending 2,5-dimethoxy-4-chloroaniline in water and adding the complete amount of diketene necessary altogether at the beginning of the reaction. The product is obtained in a purity allowing its use as an azoic coupling component without purification.