专利检索 ap:("NISSAN CHEMICAL INDUSTRIES LTD.") AND inv:"Kawamura, Yasuo c/o Central Research Institute" 第 1 页

1.

发明公开
Process for producing 2-tert.-butyl-4,5-dichloro-3(2H)-pyridazinone 失效
标题翻译：制备2-叔丁基-4,5-二氯-3（2H） - 吡啶酮的方法

公开(公告)号：EP0169375A3

公开(公告)日：1986-12-03

申请号：EP85107602

申请日：1985-06-19

申请人： NISSAN CHEMICAL INDUSTRIES LTD.

发明人： Suzuki, Hideo c/o Central Research Institute , Kawamura, Yasuo c/o Central Research Institute , Ogura, Tomoyuki c/o Central Research Institute

IPC分类号： C07D237/14 , C07C109/18

CPC分类号： C07C251/72 , C07D237/14

摘要： Novel processes for producing 2-tert.-butyl-4,5-dichloro--3(2H)-pyridazinone comprise reacting tert. -butylhydrazine with mucochloric acid in an aromatic hydrocarbon and/or chlorinated hydrocarbon solvent. A novel compound, mucochloric acid-tert.-butylhydrazone, is also provided as an intermediate product.