2',3'-O,O-isopropylidene-2'-C-β-methylguanosine 、
1-phenylethyl (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54%的产率得到1-phenylethyl (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