(9H-fluoren-9-yl)methyl (3-chloro-3-oxopropyl)carbamate 、
5'-amino-5'-deoxy-2',3'-O-isopropylideneuridine 在
sodium carbonate 作用下,
以
氯仿 为溶剂,
以93%的产率得到9H-fluoren-9-ylmethyl N-[3-[[(3aR,4R,6R,6aR)-4-(2,4-dioxopyrimidin-1-yl)-2,2-dimethyl-3a,4,6,6a-tetrahydrofuro[3,4-d][1,3]dioxol-6-yl]methylamino]-3-oxopropyl]carbamate