Process for the preparation of 5-acetoacetylamino...

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

C - Chemistry, Metallurgy

07

D

260/314

C07D 235/26 (2006.01)

Patent

CA 1058621

PROCESS FOR THE PREPARATION OF 5-ACETOACETYLAMINO- . BENZIMIDAZOLONE Abstract of the Disclosure: 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.

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