Invention Grant
US4087610A Process for the preparation of 5-acetoacetylamino-benzimidazolone
失效
5-乙酰乙酰氨基 - 苯并咪唑酮的制备方法
- Patent Title: Process for the preparation of 5-acetoacetylamino-benzimidazolone
- Patent Title (中): 5-乙酰乙酰氨基 - 苯并咪唑酮的制备方法
-
Application No.: US680719Application Date: 1976-04-27
-
Publication No.: US4087610APublication Date: 1978-05-02
- Inventor: Wilfried Sahm , Ernst Hille , Wolfgang Schiller
- Applicant: Wilfried Sahm , Ernst Hille , Wolfgang Schiller
- Applicant Address: DT Frankfurt am Main
- Assignee: Hoechst Aktiengesellschaft
- Current Assignee: Hoechst Aktiengesellschaft
- Current Assignee Address: DT Frankfurt am Main
- Priority: DT2518922 19750429
- Main IPC: C07D235/26
- IPC: C07D235/26
Abstract:
5-Acetoacetylamino benzimidazolone-(2) is obtained in high yield and excellent purity by reacting diketene with the aqueous solution of a salt of 5-amino-benzimidazolone-(2) and an acid having a pKa value of 1 to 7, preferably in the presence of an antioxidant and/or a reducing agent.
Public/Granted literature
- US4698930A Film holder Public/Granted day:1987-10-13
Information query
