申请人:SUMITOMO CHEMICAL COMPANY, LIMITED
公开号:EP0716088A1
公开(公告)日:1996-06-12
There is disclosed a process for producing a 2-(tetrazol-5-yl)-4-oxo-4H-benzopyran of general formula (1):
which comprises reacting a hydroxyacetophenone of general formula (2):
with a tetrazole compound of general formula (3):
in the presence of a base in a solvent composed mainly of at least one selected from hydrocarbons, halogenated hydrocarbons and alcohols, and then treating the reaction mixture under acidic conditions.
本发明公开了一种通式(1)的 2-(四唑-5-基)-4-氧代-4H-苯并吡喃的生产工艺:
其中包括使通式(2)的羟基苯乙酮反应:
与通式(3)的四唑化合物反应:
在主要由碳氢化合物、卤代烃和醇中至少一种组成的溶剂中,在碱存在下与四唑化合物反应,然后在酸性条件下处理反应混合物。