5-Hydroxy-8,8-dimethyl-6-(2-methyl-butyryl)-4-phenyl-3,4,9,10-tetrahydro-8H-pyrano[2,3-f]chromen-2-one 、
硫酸二甲酯 在
potassium carbonate 作用下,
以
丙酮 为溶剂,
反应 3.0h,
以45 mg的产率得到5-Methoxy-8,8-dimethyl-6-(2-methyl-butyryl)-4-phenyl-3,4,9,10-tetrahydro-8H-pyrano[2,3-f]chromen-2-one