9-<3'-azido-3'-deoxy-5'-O-(monomethoxytrityl)-β-D-xylofuranosyl>-N
6-<2-(4-nitrophenyl)ethoxycarbonyl>adenin 2'-<2-(4-nitrophenyl)ethyl triethylammonium phosphate> 、
9-<3'-azido-3'-deoxy-β-D-xylofuranosyl>-N6-<2-(4-nitrophenyl)ethoxycarbonyl>adenin 2'-<2,5-dichlorophenyl 2-(4-nitrophenyl)ethyl phosphate> 在
N-甲基咪唑 、
2,4,6-三异丙基苯磺酰氯 作用下,
以
吡啶 为溶剂,
以88%的产率得到<9-<3'-azido-3'-deoxy-5'-O-(monomethoxytrityl)-β-D-xylofuranosyl>-N
6-<2-(4-nitrophenyl)ethoxycarbonyl>adenin>-2'-yl-<2'-
P-<2-(4-nitrophenyl)ethyl>>-> 5'>-9-<3'-azido-3'-deoxy-β-D-xylofuranosyl>-N6-<2-(4-nitrophenyl)ethoxycarbonyl>adenine) ...