Method for preparing 5-acetoacetylamino-2-benzamidazolone

摘要

5-acetoacetylamino by successive reactions of 5-amino-2benzimidazolone, including reacting at boiling point temperature in the presence of a water soluble (C ₁ -C ₄ ) -alcohol or a mixture of this alcohol and water. A method for preparing 2-benzimidazolone is provided.