1-(3-O-tert-butyldimethylsilyl-β-D-ribofuranosyl)-5,6-dichlorobenzimidazolyl-(2'-P-(2,5-dichlorophenyl)>->5')-5,6-dichloro 1-(2,3-di-O-tert-butyldimethylsilyl-β-D-ribofuranosyl)benzimidazole   、                                                                                      
1-(3-O-tert-butyldimethylsilyl-5-O-p-methoxytrityl-β-D-ribofuranosyl)-5,6-dichlorobenzimidazole 2'-<2,5-dichlorophenyl pyridinium phosphate>                                                                                                                                                              在
                                                                                                                                                                                 
四氮唑   、                                                                                                  
2,4,6-三异丙基苯磺酰氯                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
吡啶                                                                                  为溶剂,
                                                                                                                                                    反应 24.0h,
                                                                                                                以54%的产率得到[(2R,3R,4R,5R)-4-[[(2R,3R,4R,5R)-3,4-bis[[tert-butyl(dimethyl)silyl]oxy]-5-(5,6-dichlorobenzimidazol-1-yl)oxolan-2-yl]methoxy-(2,5-dichlorophenoxy)phosphoryl]oxy-3-[tert-butyl(dimethyl)silyl]oxy-5-(5,6-dichlorobenzimidazol-1-yl)oxolan-2-yl]methyl [(2R,3R,4R,5R)-4-[tert-butyl(dimethyl)silyl]oxy-2-(5,6-dichlorobenzimidazol-1-yl)-5-[[(4-methoxyphenyl)-diphenylmethoxy]methyl]oxolan-3-yl] (2,5-dichlorophenyl) phosphate