(SP)-N4-benzoyl-5'-O-(4,4'-dimethoxytrityl)-2'-deoxycytidine-3'-O-monothio-phosphate O-2-(4-nitrophenyl)ethyl ester 、
碘甲烷 在
吡啶 、
三乙胺 作用下,
反应 24.0h,
以65%的产率得到(S)-Thiophosphoric acid O-{(2R,3S,5R)-5-(4-benzoylamino-2-oxo-2H-pyrimidin-1-yl)-2-[bis-(4-methoxy-phenyl)-phenyl-methoxymethyl]-tetrahydro-furan-3-yl} ester S-methyl ester O'-[2-(4-nitro-phenyl)-ethyl] ester