(S)-3-{4-[Bis-(2-nitro-benzyloxy)-phosphoryloxy]-phenyl}-2-(3,4-dimethoxy-2-nitro-benzyloxycarbonylamino)-propionic acid cyanomethyl ester 、 phosphoro-2′-deoxycytidylyl[3′→5′]adenosine tris(tetrabutylammonium) salt 以
N,N-二甲基甲酰胺 为溶剂,
以77%的产率得到N{[(2-nitroveratryl)oxy]carbonyl}-O-[bis[(2-nitrobenzyl)oxy]phosphoryl]-(S)-tyrosine pdCpA ester