专利检索 ap:("BASF AKTIENGESELLSCHAFT") AND inv:"MERKLE, Hans, Rupert" 第 3 页

21.

发明公开
VERFAHREN ZUR HERSTELLUNG VON 3,5-DIARYLPYRAZOLEN 失效
标题翻译：用于生产3,5-二芳基吡

公开(公告)号：EP0802906A1

公开(公告)日：1997-10-29

申请号：EP96900559.0

申请日：1996-01-04

申请人： BASF AKTIENGESELLSCHAFT

发明人： MERKLE, Hans, Rupert , FRETSCHNER, Erich

IPC分类号： C07D231

CPC分类号： C07D231/12

摘要： A process for producing 3,5-diaryl pyrazolene of general formula (I), where R?1 and R3¿ are possibly substituted aryl radicals, R2 is hydrogen, C¿1?-C8 alkyl and possibly substituted aryl, in which hydrazine hydrate is reacted with 1,3 diaryl propenonene of general formula (II), where R?1, R2 and R3¿ have the above meanings, in sulphuric acid in the presence of iodine or an iodine compound.