Improvement of the Catalyst in Reaction on the Synthesis of 7-Diethylamino-4-methylcoumarin

Synthesis of 7-hydroxy-4-methyl coumarin catalyzed by sulfoacid resin;

Synthesis of 7-hydroxy-4-methyl coumarin on stannic chloride anhydrous catalyst;

7-hydroxy-4-methyl coumarin as chemical or medical intermediates is very important in industry.

4-methyl-7-hydroxycoumarin,acetic anhydride were used as main materials to synthesis 4-methyl-7-acetoxycoumarin by two methods,One was direct esterification of 4-methyl-7-hydroxycoumarin with acetic anhydride,the other was reacting of acetic anhydride with 4-methyl-7-hydroxy coumarin′ sodium salt, the construction of title compound was confirmed by m.