公开(公告)号：CZ20013470A3

公开(公告)日：2002-03-13

申请号：CZ20013470

申请日：2000-03-30

Applicant: BASF AG

Inventor： MEKLE HANS RUPERT ,  HERBIG KLAUS ,  FRETSCHNER ERICH ,  FROHLICH HELMUT

IPC: C07D237/22

Abstract: In a process for preparing 4-amino-5-chloro-1-phenylpyridazin-6-one by reacting 4,5-dichloro-1-phenylpyridazin-6-one with aqueous ammonia in the presence of a catalyst, the catalyst used is soluble in the aqueous alkaline reaction medium but is essentially insoluble in the reaction medium which has been acidified after removal of the 4-amino-5-chloro-1-phenylpyridazin-6-one.The process of the present invention makes it possible for the catalyst to be recovered and reused in a simple manner.

公开(公告)号：SK286901B6

公开(公告)日：2009-07-06

申请号：SK13172001

申请日：2000-03-30

Applicant: BASF AG

Inventor： MERKLE HANS RUPERT ,  HERBIG KLAUS ,  FRETSCHNER ERICH ,  FROHLICH HELMUT

IPC: C07D237/00 ,  C07D237/22

Abstract: The invention relates to a method for producing 4-amino-5-chloro-1-phenyl pyridazinone-(6) by reacting 4,5-dichloro-1-phenyl pyridazinone-(6) with aqueous ammonia in the presence of a catalyst. According to the invention, a catalyst is used which is soluble in the aqueous alkaline reaction medium but which is, however, essentially insoluble in the reaction mixture that is acidically regulated after the 4-amino-5-chloro-1-phenyl pyridazinone-(6) has been removed. The inventive method makes it possible, in a simple manner, to recover and reuse the catalyst.

公开(公告)号：SK13172001A3

公开(公告)日：2002-05-09

申请号：SK13172001

申请日：2000-03-30

Applicant: BASF AG

Inventor： MERKLE HANS RUPERT ,  HERBIG KLAUS ,  FRETSCHNER ERICH ,  FROHLICH HELMUT

IPC: C07D237/22

Abstract: In a process for preparing 4-amino-5-chloro-1-phenylpyridazin-6-one by reacting 4,5-dichloro-1-phenylpyridazin-6-one with aqueous ammonia in the presence of a catalyst, the catalyst used is soluble in the aqueous alkaline reaction medium but is essentially insoluble in the reaction medium which has been acidified after removal of the 4-amino-5-chloro-1-phenylpyridazin-6-one.The process of the present invention makes it possible for the catalyst to be recovered and reused in a simple manner.

公开(公告)号：AU771700B2

公开(公告)日：2004-04-01

申请号：AU3433100

申请日：2000-03-30

Applicant: BASF AG

Inventor： MERKLE HANS RUPERT ,  HERBIG KLAUS ,  FRETSCHNER ERICH ,  FROHLICH HELMUT

IPC: C07D237/22

Abstract: In a process for preparing 4-amino-5-chloro-1-phenylpyridazin-6-one by reacting 4,5-dichloro-1-phenylpyridazin-6-one with aqueous ammonia in the presence of a catalyst, the catalyst used is soluble in the aqueous alkaline reaction medium but is essentially insoluble in the reaction medium which has been acidified after removal of the 4-amino-5-chloro-1-phenylpyridazin-6-one.The process of the present invention makes it possible for the catalyst to be recovered and reused in a simple manner.

公开(公告)号：AU3433100A

公开(公告)日：2000-10-23

申请号：AU3433100

申请日：2000-03-30

Applicant: BASF AG

Inventor： MERKLE HANS RUPERT ,  HERBIG KLAUS ,  FRETSCHNER ERICH ,  FROHLICH HELMUT

IPC: C07D237/22

Abstract: In a process for preparing 4-amino-5-chloro-1-phenylpyridazin-6-one by reacting 4,5-dichloro-1-phenylpyridazin-6-one with aqueous ammonia in the presence of a catalyst, the catalyst used is soluble in the aqueous alkaline reaction medium but is essentially insoluble in the reaction medium which has been acidified after removal of the 4-amino-5-chloro-1-phenylpyridazin-6-one.The process of the present invention makes it possible for the catalyst to be recovered and reused in a simple manner.