PROCESS FOR PRODUCING 2-(TETRAZOL-5-YL)-4-OXO-4H-BENZOPYRANS

摘要

There is disclosed a process for producing a 2-(tetrazol-5-yl)-4-oxo-4H-benzopyran of general formula (1): <CHEM> which comprises reacting a hydroxyacetophenone of general formula (2): <CHEM> with a tetrazole compound of general formula (3): <CHEM> 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.