5'-O-(tert-butyldimethylsilyl)-2',3'-O-isopropylideneuridine 、
三甲基乙炔基硅 在
铜 、
钯 作用下,
以94%的产率得到1-[(3aR,4R,6R,6aR)-6-(tert-Butyl-dimethyl-silanyloxymethyl)-2,2-dimethyl-tetrahydro-furo[3,4-d][1,3]dioxol-4-yl]-5-trimethylsilanylethynyl-1H-pyrimidine-2,4-dione