5’-O-[dimethyl(1,1,2-trimethylpropyl)silyl]-N2-isobutyryl-2’,3’-O-isopropylidene-O6-[2-(4-nitrophenyl)ethyl]guanosine-8-methyl-(81→5’-S)-N4-benzoyl-2’,3’-O-isopropylidene-5’-thiocytidine-6-methyl-(61→5’-S)-2’,3’-O-isopropylidene-5’-thiouridine-6-methyl-(61→5’-S)-N6-benzoyl-2’,3’-O-isopropylidene-8-{[(methylsulfonyl)oxy]methyl}-5’-thioadenosine 、 5’-S-acetyl-2’,3’-O-isopropylidene-5’-thiouridine-6-methyl-(6
1→5’-S)-N
6-benzoyl-2’,3’-O-isopropylidene-5’-thioadenosine-8-methyl-(8
1→5’-S)-N
2-isobutyryl-2’,3’-O-isopropylidene-O
6-[2-(4-nitrophenyl)-ethyl]-5’-thioguanosine-8-methyl-(8
1→5’-S)-N
4-benzoyl-6-(hydroxymethyl)-2’,3’-O-isopropylidene-5’-thiocytidine 在
N,N-二异丙基乙胺 作用下,
以
二甲基亚砜 为溶剂,
反应 6.0h,
以135 mg的产率得到5’-O-[dimethyl(1,1,2-trimethylpropyl)silyl]-N2-isobutyryl-2’,3’-O-isopropylidene-O
6-[2-(4-nitrophenyl)ethyl]guanosine-8-methyl-(8→5’-S)-N
4-benzoyl-2’,3’-O-isopropylidene-5’-thiocytidine-6-methyl-(6
1→5’-S)-2’,3’-O-isopropylidene-5’-thiouridine-6-methyl-(6
1→5’-S)-N
6-benzoyl-2’,3’-O-isopropylidene-5’-thioadenosine-8-methyl-(8
1→5’-S)-2’,3’-O-isopropylidene-5’-thiouridine-6-methyl-(6
1→5’-S)-N
6-benzoyl-2’,3’-O-isopropylidene-5’-thioadenosine-8-methyl-(8
1→5’-S)-N
2-isobutyryl-2’,3’-O-isopropylidene-O
6-[2-(4-nitrophenyl)ethyl]-5’-thioguanosine-8-methyl-(8
1→5’-S)-N
4-benzoyl-6-(hydroxymethyl)-2’,3’-O-isopropylidene-5’-thiocytidine