2-iodoethyl phenoxyacetate 、
5'-O-(4,4'-dimethoxytrityl)-3'-O-(t-butyldimethylsilyl)-2'-deoxythymidine 在
1,8-二氮杂双环[5.4.0]十一碳-7-烯 作用下,
以
乙腈 为溶剂,
反应 24.0h,
以87.5%的产率得到Phenoxy-acetic acid 2-{3-[(2R,4S,5R)-5-[bis-(4-methoxy-phenyl)-phenyl-methoxymethyl]-4-(tert-butyl-dimethyl-silanyloxy)-tetrahydro-furan-2-yl]-5-methyl-2,6-dioxo-3,6-dihydro-2H-pyrimidin-1-yl}-ethyl ester