公开(公告)号：ZA7806067B

公开(公告)日：1979-11-28

申请号：ZA7806067

申请日：1978-10-27

Applicant: HOECHST AG

Inventor： ABLERS A ,  RINGEL E ,  PASZTHORY E ,  ELINKMANN H

IPC: C02F1/74 ,  C02F3/12 ,  C02F11/08 ,  C02C

CPC classification number: C02F11/08

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.

公开(公告)号：DK479778A

公开(公告)日：1979-04-30

申请号：DK479778

申请日：1978-10-27

Applicant: HOECHST AG

Inventor： PASZTHORY E ,  ALBERS A ,  RINGEL E ,  ELINKMANN H G

IPC: C02F1/74 ,  C02F3/12 ,  C02F11/08 ,  C02C

公开(公告)号：BR7507755A

公开(公告)日：1976-08-10

申请号：BR7507755

申请日：1975-11-24

Applicant: HOECHST AG

Inventor： PASZTHORY E ,  MEES B ,  HILLE E

IPC: C07B61/00 ,  C07C20060101 ,  C07C67/00 ,  C07C213/00 ,  C07C213/02 ,  C07C217/84 ,  C07C87/52

Abstract: 1527892 Preparation of 4-chloro-2,5-dimethoxyaniline HOECHST AG 25 Nov 1975 [25 Nov 1974] 48445/75 Heading C2C 4 - Chloro - 2,5 - dimethoxyaniline or a salt thereof is obtained by treating a mixture comprising water and particles of 4-chloro-2,5- dimethoxynitrobenzene having an average size of less than 100 microns with hydrogen in the presence of a nickel catalyst, and if desired, converting the 4-chloro-2,5-dimethoxyaniline to a salt thereof.

公开(公告)号：ZA786067B

公开(公告)日：1979-11-28

申请号：ZA786067

申请日：1978-10-27

Applicant: HOECHST AG

Inventor： ABLERS A ,  RINGEL E ,  PASZTHORY E ,  ELINKMANN H

IPC: C02F1/74 ,  C02F3/12 ,  C02F11/08 ,  C02C

公开(公告)号：IN144221B

公开(公告)日：1978-04-08

申请号：IN736CA1976

申请日：1976-04-27

Applicant: HOECHST AG

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

IPC: C07C235/80 ,  C07C67/00 ,  C07C231/00 ,  C07C231/04 ,  C07C233/16 ,  C07C103/12

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.