二碳酸二叔丁酯 、
2,5-anhydro-3,4-di-O-benzyl-1-deoxy-1-(uracil-1'-yl)-6-(5''-(4'''-(N,N'-bis-(tertbutyloxycarbonyl)guanidinomethylene)-1H,1''',2''',3'''-triazol-1'''-yl)-1'',5''-dideoxy-2'',3''-O-isopentylidene-β-D-ribos-1''-yl)-D-glucitol 在
4-二甲氨基吡啶 、
三乙胺 作用下,
以
四氢呋喃 为溶剂,
以79%的产率得到2,5-anhydro-3,4-di-O-benzyl-1-deoxy-1-(3'-(N-tertbutyloxycarbonyl)-uracil-1'-yl)-6-(5''-(4'''-(N,N',N'',N''-tetra-(tertbutyloxycarbonyl)guanidinomethylene)-1H,1''',2''',3'''-triazol-1'''-yl)-1'',5''-dideoxy-2'',3''-O-isopentylidene-β-D-ribos-1''-yl)-D-glucitol