N-[9-[(2R,3R,4S,5R)-5-[[bis(4-methoxyphenyl)-phenylmethoxy]methyl]-3-fluoro-4-hydroxyoxolan-2-yl]purin-6-yl]benzamide 在
三乙胺 、
(3aR)-1-chlorotetrahydro-1H,3H-pyrrolo[1,2-c][1,3,2]oxazaphosphole 作用下,
以
二氯甲烷 为溶剂,
以70 %的产率得到N-benzoyl-5'-O-[bis(4-methoxyphenyl)(phenyl)methyl]-2'-deoxy-2'-fluoro-3'-O-[(1S,3aR)-tetrahydro-1H,3H-pyrrolo[1,2-c][1,3,2]oxazaphosphol-1-yl]adenosine