N(6)-benzoyl-8-(bromomethyl)-5'-O-[dimethyl(1,1,2-trimethylpropyl)silyl]-2',3'-O-isopropylideneadenosine 、
5'-S-acetyl-2',3'-O-isopropylidene-6-{[(4-methoxyphenyl)diphenylmethoxy]methyl}uridine 在
sodium methylate 作用下,
以
甲醇 为溶剂,
反应 14.0h,
以75%的产率得到5'-O-[dimethyl(1,1,2-trimethylpropyl)silyl]-2',3'-O-isopropylideneadenosine-8-methyl-(8'->5'-S)-2',3'-O-isopropylidene-6-{[(4-methoxyphenyl)diphenylmethoxy]methyl}-5'-thiouridine