NEW 1,2-DIHYDRO-4H-3,1-BENZOXAZIN-4-ONE DERIVATIVE AND ITS PRODUCTION

摘要

NEW MATERIAL:The compound of formula. USE:An intermediate for the production of therapeutic agents of allergic diseases. PREPARATION:The compound can be produced by reacting anthranilic acid with 2,2-dimethoxypropane in the presence of an acid catalyst (e.g. benzenesulfonic acid, p-toluenesulfonic acid or sulfuric acid) optionally in a solvent.