2',3'-O,O-isopropylidene-2'-C-β-methylguanosine   、                                                                                      
2-chlorobenzyl (chloro(naphthalen-1-yloxy)phosphoryl)-L-valinate                                                                                                                                                              在
                                                                                                                                                                                 
叔丁基氯化镁                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
四氢呋喃                                                                                  为溶剂,
                                                                                                                                                                                        以65%的产率得到(2-chlorophenyl)methyl (2S)-2-[[[(3aR,4R,6R,6aR)-4-(2-amino-6-oxo-1H-purin-9-yl)-2,2,3a-trimethyl-6,6a-dihydro-4H-furo[3,4-d][1,3]dioxol-6-yl]methoxy-naphthalen-1-yloxyphosphoryl]amino]-3-methylbutanoate