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公开(公告)号:DE2902740A1
公开(公告)日:1980-08-07
申请号:DE2902740
申请日:1979-01-25
Applicant: HOECHST AG
IPC: C07C67/08 , C07C205/57 , C07C205/58 , C07C205/59 , C07C101/52 , C07C99/00
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公开(公告)号:DE2855226A1
公开(公告)日:1980-07-10
申请号:DE2855226
申请日:1978-12-21
Applicant: HOECHST AG
Inventor: HEISE HARTMUT DIPL CHEM DR , HILLE ERNST DIPL CHEM DR , WAGNER REINHARD DIPL CHEM DR , KUEMMERLE KURT DIPL CHEM DR
IPC: C07D235/26
Abstract: Benzimidazolone-(2) is obtained in good yield and high purity when o-phenylene diamine is condensed with urea in water at a pH of 4 to 9 and a temperature above 90 DEG C.
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