3'-O-(4-methoxytetrahydropyranyl)thymidine 、
5'-O-methoxytetrahydropyranylthymidine 3'-(o-chlorophenyl) phosphate triethylammonium salt 在
苯甲基-2-磺酰三硝基三氮唑 作用下,
以
吡啶 为溶剂,
反应 0.33h,
以68%的产率得到5'-O-methoxytetrahydropyranylthymidylyl-(3'-> 5')-3'-O-methoxytetrahydropyranylthymidine o-chlorophenyl ester