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公开(公告)号：DE2937421A1
公开(公告)日：1981-04-09
申请号：DE2937421
申请日：1979-09-15
Applicant: BASF AG
Inventor： RICHARZ WINFRIED DIPL CHEM DR , FROEHLICH HELMUT DIPL CHEM DR , SCHROEDER HARALD DIPL CHEM DR
IPC: A01N43/58 , A01P13/00 , C07D237/22 , C07D237/10
Abstract: The manufacture of substantially pure 4-amino-5-chloro-1-phenylpyridaz-6-one by reaction of 4,5-dichloro-1-phenylpyridaz-6-one with ammonia in the presence of phenol-4-sulfonic acid.
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