3'-O-acetyl-N2-isobutyryl-2'-deoxyguanosine   、                                                                                      
(Sp)-5'-O-DMT-thymidine-3'-O-(Se-methyl methanephosphonoselenolate)                                                                                                                                                              在
                                                                                                                                                                                 
1,8-二氮杂双环[5.4.0]十一碳-7-烯   、                                                                                                  
lithium chloride                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
吡啶                                                                                  为溶剂,
                                                                                                                                                                                        以93%的产率得到[(2R,3S,5R)-2-[[[(2R,3S,5R)-2-[[bis(4-methoxyphenyl)-phenylmethoxy]methyl]-5-(5-methyl-2,4-dioxopyrimidin-1-yl)oxolan-3-yl]oxy-methylphosphoryl]oxymethyl]-5-[2-(2-methylpropanoylamino)-6-oxo-1H-purin-9-yl]oxolan-3-yl] acetate