Process for the preparation of 5-acetoacetylamino-benzimidazolon

Details Process for the preparation of 5-acetoacetylamino-benzimidazolon Process for the preparation of 5-acetoacetylamino-benzimidazolon

1976-04-27

1978-05-02

Trousof, Natalie

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D23526

Patent

active

040876101

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.

REFERENCES:
patent: 1982675 (1934-12-01), Law
patent: 2152132 (1939-03-01), Boese
patent: 3963694 (1976-06-01), Mory et al.

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