2-Phenylsulfonylethylchloroformate (PSEC) 、
N4-benzoyl-O5'-(2-dibromomethyl-benzoyl)-2'-deoxy-cytidine 以
吡啶 为溶剂,
反应 0.5h,
以99%的产率得到2-Dibromomethyl-benzoic acid (2R,3S,5R)-3-(2-benzenesulfonyl-ethoxycarbonyloxy)-5-(4-benzoylamino-2-oxo-2H-pyrimidin-1-yl)-tetrahydro-furan-2-ylmethyl ester