苯甲醛二甲缩醛 、
2',3'-O-benzylidene-5'-O-tert-butyldimethylsilylguanosine 反应 24.0h,
以68%的产率得到9-[(3aR,4R,6R,6aR)-6-(tert-Butyl-dimethyl-silanyloxymethyl)-2-phenyl-tetrahydro-furo[3,4-d][1,3]dioxol-4-yl]-2-{[1-phenyl-meth-(E)-ylidene]-amino}-1,9-dihydro-purin-6-one