甲基戊酰氯 、
5'-O-trityl-3'-β-hydroxy-3'-α-(diethyl)phosphonothymidine 在
4-二甲氨基吡啶 作用下,
以
乙腈 为溶剂,
反应 1.0h,
生成 Oxalic acid (2R,3S,5R)-3-(diethoxy-phosphoryl)-5-(5-methyl-2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-2-trityloxymethyl-tetrahydro-furan-3-yl ester methyl ester