Methods: Chloroform being solvent,under bath heat, 4-hydroxymethyl caged bicyclic phosphate acylated with pentanoyl chloride and hexanoyl chloride dividedly.

• 方法：用氯仿作溶剂，在浴温条件下，4-羟甲基笼状双环磷酸酯分别与戊酰氯、己酰氯发生酰化反应。