N-(4-pentenoyl)-(S)-[1-13C]valine cyanomethyl ester 、
N-(4-pentenoyl)-(S)-alanine cyanomethyl ester 、 phosphoro-2′-deoxycytidylyl[3′→5′]adenosine tris(tetrabutylammonium) salt 在
三乙胺 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
以28%的产率得到[(2R,3R,4R,5R)-2-[[[(2R,3S,5R)-5-(4-amino-2-oxopyrimidin-1-yl)-2-(phosphonooxymethyl)oxolan-3-yl]oxy-hydroxyphosphoryl]oxymethyl]-5-(6-aminopurin-9-yl)-4-[(2S)-2-(pent-4-enoylamino)propanoyl]oxyoxolan-3-yl] (2S)-3-methyl-2-(pent-4-enoylamino)(113C)butanoate